CN114179277A

CN114179277A - Punch forming die

Info

Publication number: CN114179277A
Application number: CN202111504231.2A
Authority: CN
Inventors: 杨卫海
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-03-15
Anticipated expiration: 2041-12-09
Also published as: CN114179277B

Abstract

The invention relates to the technical field of stamping devices, and particularly discloses a stamping forming die which comprises an upper die base, a lower die base and a material ejecting device, wherein the upper die base is provided with a punch, the lower die base is provided with a processing groove, the bottom wall of the processing groove is provided with a material ejecting cavity with an opening, a workpiece to be processed covers the opening of the bottom wall of the processing groove, the material ejecting device comprises a material ejecting block and a driving assembly, the material ejecting block is arranged in the material ejecting cavity, and the driving assembly is connected with the material ejecting block so as to drive the material ejecting block to slide relative to the material ejecting cavity. The punch and the ejection block are abutted to two sides of a workpiece to be processed, the upper die base drives the punch to stretch and punch the workpiece to be processed, the punch presses the workpiece into the ejection cavity from the opening, the driving assembly drives the ejection block to slide along the ejection cavity, and the movement directions of the ejection block and the punch are the same, so that the pressure of the workpiece to be processed is unchanged. The stamping forming die in the technical scheme of the invention has the advantages of simple structure, reduced production cost, short production period and effectively improved production efficiency.

Description

Punch forming die

Technical Field

The invention relates to the technical field of stamping devices, in particular to a stamping forming die.

Background

Polycarbonate (PC) is colorless and transparent, heat-resistant and impact-resistant, has the characteristics of high mechanical strength, wide use temperature range, good electrical insulation performance and the like, and can be used for protecting chips.

When the PC film is subjected to hot stamping forming, the PC film needs to be heated and formed firstly, and then the formed product needs to be cooled, so that the process is complex, the number of input devices is large, the production period is long, the production efficiency is low, and the production cost is high. When the PC film is formed by cold stamping, the stress distribution of the PC film is uneven, the stress is large, the processed product is distorted, and the stability of the size of the product cannot be ensured.

Therefore, the problems of large stress and uneven distribution of the PC film caused by cold stamping are to be solved.

Disclosure of Invention

The invention mainly aims to provide a punch forming die, and aims to solve the problems of large stress and uneven distribution of a PC film caused by cold stamping.

In order to achieve the above object, the present invention provides a press forming die, including:

the upper die holder is provided with a punch;

the lower die base is opposite to the upper die base and provided with a processing groove, a material ejecting cavity with an opening is formed in the bottom wall of the processing groove, and the punch extends into the material ejecting cavity from the opening; and

the ejection device comprises an ejection block and a driving assembly, the ejection block is movably arranged in the ejection cavity and is connected with the output end of the driving assembly, and the driving assembly drives the ejection block to slide relative to the ejection cavity.

Optionally, the drive assembly comprises:

one end of the pull rod assembly is movably arranged in the material ejecting cavity and connected with the material ejecting block, and the other end of the pull rod assembly penetrates through the lower die base; and

the cylinder is connected to one end, deviating from the ejector block, of the pull rod assembly.

Optionally, the driving assembly further includes a return spring, the return spring is sleeved at one end of the pull rod assembly located in the material ejecting cavity, and two ends of the return spring respectively elastically abut against the material ejecting block and the bottom wall of the material ejecting cavity.

Optionally, the material pushing block is provided with a limiting groove, the inner wall of the material pushing cavity is provided with a limiting table, one end of the return spring is accommodated in the limiting groove, and the other end of the return spring abuts against the limiting table.

Optionally, the tie rod assembly comprises:

the pull rod is connected to the material pushing block and penetrates through the lower die base, and the reset spring is sleeved on the pull rod;

the swinging piece is connected to one end, away from the ejector block, of the pull rod; and

the plug-in components movably abut against the swinging components and the lower die base, and the air cylinder is connected to one end, deviating from the swinging components, of the plug-in components.

Optionally, the distance between the outer side wall of the punch and the inner side wall of the ejection cavity is smaller than the thickness of the workpiece to be processed.

Optionally, the lower die base is further provided with a rigid pressing ring and a flexible pressing ring, the pressing ring is located at the opening of the material ejection cavity, and the flexible pressing ring is sleeved on the periphery of the rigid pressing ring.

Optionally, the lower die holder is further provided with a pressing sheet, and the pressing sheet is arranged on one side, away from the lower die holder, of the flexible pressing ring.

Optionally, the upper die holder is further provided with a movable pressing block, the punch penetrates through the movable pressing block, and the movable pressing block is movably abutted to the periphery of the machining groove so as to press the workpiece to be machined.

Optionally, the lower die base is further provided with a limiting assembly, and a limiting opening is formed in one side, facing the processing groove, of the limiting assembly so as to limit the workpiece to be processed.

The stamping forming die comprises an upper die base, a lower die base and a material ejecting device, wherein the upper die base is provided with a punch, the lower die base is provided with a processing groove, the bottom wall of the processing groove is provided with a material ejecting cavity with an opening, a workpiece to be processed covers the opening of the bottom wall of the processing groove, the material ejecting device comprises a material ejecting block and a driving assembly, the material ejecting block is arranged in the material ejecting cavity, and the driving assembly is connected with the material ejecting block so as to drive the material ejecting block to slide relative to the material ejecting cavity. The punch and the ejector block are located on two sides of the workpiece to be processed and are abutted against the workpiece to be processed, the punch is driven by the upper die base to stretch and punch the workpiece to be processed, the workpiece is pressed into the ejector cavity through the punch through the opening, the ejector block is driven by the driving assembly to slide along the ejector cavity, the ejector block and the punch are the same in moving direction, and the pressure on the workpiece to be processed is constant. Therefore, through setting up foretell liftout device, treat the in-process of processing work piece stamping forming, mutually support with the drift for the pressure that treats processing work piece and receive is unchangeable, with the good mobility of assurance work piece, and then makes the stress after the work piece stamping forming less, non-deformable. The stamping forming die in the technical scheme of the invention has the advantages of simple structure, reduced production cost, short production period and effectively improved production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a press forming die according to an embodiment of the present invention;

FIG. 2 is a side cross-sectional view of a stamping forming die in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a schematic structural view of a lower die holder according to an embodiment of the present invention;

FIG. 6 is an enlarged view of portion C of FIG. 4;

fig. 7 is a schematic structural diagram of a rigid pressing ring and a flexible pressing ring in an embodiment of the invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating 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, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Polycarbonate (PC) is colorless and transparent, heat-resistant and impact-resistant, has the characteristics of high mechanical strength, wide use temperature range, good electrical insulation performance and the like, and can be used for protecting chips. When the PC film is subjected to hot stamping forming, the PC film needs to be heated and formed firstly, and then the formed product needs to be cooled, so that the process is complex, the number of input devices is large, the production period is long, the production efficiency is low, and the production cost is high. When the PC film is formed by cold stamping, the stress distribution of the PC film is uneven, the stress is large, the processed product is distorted, and the stability of the size of the product cannot be ensured. Therefore, the problems of large stress and uneven distribution of the PC film caused by cold stamping are to be solved.

Based on the above conception and problems, please refer to fig. 1 to 7 in combination, an embodiment of the present invention provides a stamping forming mold 100, which includes an upper mold base 1, a lower mold base 2, and a material ejecting device 3, wherein the upper mold base 1 is provided with a punch 11; the lower die base 2 is opposite to the upper die base 1, the lower die base 2 is provided with a processing groove 21, the bottom wall of the processing groove 21 is provided with a material ejecting cavity 22 with an opening, and the punch 11 extends into the material ejecting cavity 22 from the opening; the material ejecting device 3 comprises an ejecting block 31 and a driving assembly 32, wherein the ejecting block 31 is movably arranged in the material ejecting cavity 22 and is connected with an output end of the driving assembly 32, and the driving assembly 32 drives the ejecting block 31 to slide relative to the material ejecting cavity 22.

In this embodiment, die steel material is adopted to make for upper die base 1 and lower die holder 2, and upper die base 1 is located 2 tops of lower die holder to relative with lower die holder 2, upper die base 11 is equipped with drift 11, and drift 11 sets up towards lower die holder 2. The lower die holder 2 is provided with a processing groove 21 for placing a workpiece 4 to be processed, the notch of the processing groove 21 faces the upper die holder 1, the groove bottom wall of the processing groove 21 is provided with an ejection cavity 22 with an opening, the opening of the ejection cavity 22 is positioned on the groove bottom wall of the processing groove 21, the punch 11 penetrates through the notch of the processing groove 21 and extends into the ejection cavity 22 from the opening of the ejection cavity 22, the cross section of the ejection cavity 22 is arranged in a rectangular shape, and the workpiece 4 to be processed can be a PC film. In other embodiments, the stamping forming mold 100 of the present application may also be used for stamping films of other materials, and the cross section of the ejector cavity 22 may also be configured in other shapes, such as a circle, and may be configured according to actual processing requirements, which is not specifically limited.

The ejector block 31 is made of die steel material and movably arranged in the ejector cavity 22, and an output end of the driving device 32 is connected to the ejector block 31 to drive the ejector block 31 to slide relative to the ejector cavity 22.

It can be understood that, the workpiece 4 to be processed is placed in the processing tank 21 and covers the opening of the ejector cavity 22, the ejector block 31 abuts against one side of the workpiece 4 to be processed, and the upper die base 1 moves towards the lower die base 2 to drive the punch 11 to move and abut against one side of the workpiece 4 to be processed, which is far away from the ejector block 31. The upper die holder 1 drives the punch 11 to move, a certain pressure is applied to the workpiece 4 to be processed, and the workpiece 4 to be processed is pressed into the material ejecting cavity 22 through the opening of the material ejecting cavity 22, so that the workpiece 4 to be processed is stretched and punched. Meanwhile, the driving assembly 32 drives the ejector block 31 to slide along the ejector cavity 22, and the moving direction of the ejector block 31 is the same as the punching moving direction of the punch 11, so that the pressure on the workpiece 4 to be processed is not changed.

After the punching of once accomplishing, upper die base 1 is along the direction motion that deviates from lower die holder 2, drives drift 11 and keeps away from liftout chamber 22, treats that drift 11 breaks away from liftout chamber 22 after, liftout piece 31 resumes to initial position for stamping forming's work piece 4 can be taken out by liftout chamber 22 in, and to placing new work piece 4 of treating in processing groove 21, in order to carry out the stamping forming step of next time.

Through setting up liftout device 3, treating the in-process of processing work piece 4 stamping forming, mutually support with drift 11 for the pressure that treats that processing work piece 4 received is unchangeable, in order to guarantee to treat the good mobility of processing work piece 4, and then makes the stress after the stamping forming of processing work piece 4 less, non-deformable. The stamping forming die in the technical scheme of the invention has the advantages of simple structure, reduced production cost, short production period and effectively improved production efficiency.

In an embodiment of the present invention, referring to fig. 2 again, the driving assembly 32 includes a pulling rod assembly 321 and an air cylinder 322, one end of the pulling rod assembly 321 is movably disposed in the ejector cavity 22 and connected to the ejector block 31, and the other end of the pulling rod assembly 321 penetrates through the lower die base 2; the cylinder 322 is connected to an end of the pull rod assembly 321 facing away from the ejector block 31.

In this embodiment, the pull rod assembly 321 is made of a mold steel material, one end of the pull rod assembly 321 is movably disposed in the ejector cavity 22 and connected to the ejector block 31 to drive the ejector block 31 to slide relative to the ejector cavity 22, and the other end of the pull rod assembly 321 penetrates through the lower die base 2 and is connected to the cylinder 322. The cylinder 322 is fixedly installed on the lower die base 2, and a movable end of the cylinder 322 is connected to an end of the pull rod assembly 321 away from the ejector block 31, so as to drive the pull rod assembly 321 to move relative to the ejector cavity 22, thereby driving the ejector block 31 to slide relative to the ejector cavity 22.

It can be understood that, after the workpiece 4 to be processed is placed in the processing tank 21, the ejector block 31 abuts against one side of the workpiece 4 to be processed, the upper die base 1 moves in a direction close to the lower die base 2, and the punch 11 is driven to apply a certain pressure to the workpiece 4 to be processed, so as to stretch and stamp the workpiece 4 to be processed. Meanwhile, the air cylinder 322 drives the pull rod assembly 321 to move in a direction away from the ejector cavity 22 to drive the ejector block 31 to slide along the ejector cavity 22, and the moving direction of the ejector block 31 is the same as the punching moving direction of the punch 11, so that the pressure applied to the workpiece 4 to be processed is not changed.

After one-time stamping is completed, the upper die base 1 drives the punch 11 to move along the direction departing from the lower die base 2, at the moment, the air cylinder 322 is kept still under the action of air pressure, the time delay effect is achieved, the phenomenon that the workpiece 4 deforms due to the fact that the punch 11 is ejected out when not separated from the ejection cavity 22 is prevented, after the punch 11 is separated from the ejection cavity 22, the air cylinder 322 cuts off the air pressure, the pull rod assembly 321 is driven to move along the ejection cavity 22, the ejector block 31 is driven to slide to the initial position, and the stamped workpiece 4 is ejected out of the ejection cavity 22. A new workpiece 4 to be machined is placed in the machining tank 21 to perform the next press-forming step.

Through setting up cylinder 322, drive pull rod assembly 321 moves for liftout chamber 22 to drive liftout piece 31 and slide for waiting to process work piece 4 and receiving the punching press in-process of drift 11, the pressure that receives is unchangeable, and can be after work piece 4 stamping forming, drive pull rod assembly 321 motion, with the drive liftout piece 31 slide to initial position, simple structure, convenient to use.

In an embodiment of the present invention, referring to fig. 2 and fig. 3 again, the driving assembly 32 further includes a return spring 323, the return spring 323 is sleeved at one end of the pull rod assembly 321 located in the material ejecting cavity 22, and two ends of the return spring 323 respectively elastically abut against between the material ejecting block 31 and the inner bottom wall of the material ejecting cavity 22.

In this embodiment, the driving assembly 32 further includes a return spring 323, the return spring 323 is a cylindrical compression spring, and is sleeved at one end of the pull rod assembly 321 located in the material ejecting cavity 22, one end of the pull rod assembly 321 departing from the material ejecting cavity 22 is connected to the air cylinder 322, and two ends of the return spring 323 respectively abut against between the material ejecting block 31 and the material ejecting cavity 22.

As can be understood, the upper die holder 1 drives the punch 11 to move and abut against one side of the workpiece 4 to be processed, which is away from the ejector block 31, and applies a certain pressure to the workpiece 4 to be processed, so that the workpiece 4 to be processed is pressed into the ejector cavity 22 through the opening of the ejector cavity 22, so as to stretch and punch the workpiece 4 to be processed. At this time, the ejector block 31 presses the return spring 323 under the pressure of the punch 11, the return spring 323 immediately generates an elastic force, the elastic force of the return spring 323 to the ejector block 31 is F1, the pull rod assembly 321 is driven by the cylinder 322 to move in a direction away from the ejector cavity 22 so as to drive the ejector block 31 to slide along the ejector cavity 22, the moving direction of the ejector block 31 is the same as the punching moving direction of the punch 11, the pulling force of the cylinder 322 to the ejector block 31 through the pull rod assembly 321 is F2, and the pressure applied to the workpiece 4 to be processed is F, which is F1-F2. With the punching of the punch 11, by changing the magnitude of the air pressure of the air cylinder 322, the pulling force F2 of the pulling rod assembly 321 on the ejector block 31 is changed, so that the pressure F on the workpiece 4 to be processed is not changed.

After the punching of one time is completed, the upper die base 1 drives the punch 11 to move along the direction deviating from the lower die base 2, the cylinder 322 is kept still under the action of air pressure at the moment, the time delay effect is achieved, after the punch 11 is separated from the ejection cavity 22, the air cylinder 322 is disconnected from the air pressure, the cylinder 322 does not generate driving force any more, the ejection block 31 is restored to the initial position under the action of the spring 323, the stamping forming workpiece 4 is ejected out of the ejection cavity 22, and the stamping forming workpiece 4 is conveniently taken out.

Through setting up reset spring 323, after drift 11 breaks away from liftout cavity 22, the atmospheric pressure of disconnection cylinder 322 makes liftout piece 31 resume to initial position through elasticity to carry out the stamping process next time, and through the cooperation of cylinder 322 and pull rod assembly 321, make and treat work piece 4 and in stamping forming process, receive even pressure, in order to keep good mobility, non-deformable after the shaping.

In an embodiment of the present invention, referring to fig. 2 and fig. 3 again, the ejector block 31 is provided with a limit groove 311, the inner wall of the ejector cavity 22 is provided with a limit table 221, one end of the return spring 323 is accommodated in the limit groove 311, and the other end of the return spring 323 abuts against the limit table 221.

In this embodiment, a limiting groove 311 is formed at one end of the ejector block 31 close to the pull rod assembly 321, the cross section of the limiting groove 311 is circular, and the diameter of the circular shape is larger than that of the cross section of the return spring 323, so that the return spring 323 can perform compression movement in the limiting groove 311. The inner wall of the ejector cavity 22 is provided with a limit table 221, and the limit table 221 is disposed toward the ejector block 31, so that one end of the return spring 323 is located in the limit groove 311, and the other end abuts against the limit table 221.

It can be understood that, when the upper die holder 1 drives the punch 11 to stretch and press the workpiece 4 to be processed, the limit groove 311 covers the return spring 323 and presses the return spring 323 in a direction close to the limit table 221, and the return spring 323 generates an elastic force under the supporting action of the limit table 221 and acts on the ejector block 31. The cylinder 322 drives the pull rod assembly 321 to move, so as to drive the ejector block 31 to slide along the ejector cavity 22, so that the pressure F on the workpiece 4 to be processed is not changed.

After the primary punching is completed, the upper die base 1 drives the punch 11 to move along the direction departing from the lower die base 2, after the punch 11 leaves the ejection cavity 22, the air pressure of the air cylinder 322 is cut off, and the ejection block 31 is restored to the initial position under the action of the spring 323, so that the punch-formed workpiece 4 can be taken out from the ejection cavity 22.

The limit groove 311 is arranged to limit the return spring 323, so that the situation that the position of the return spring 323 deviates after being extruded to influence the elastic action effect is avoided. By arranging the limiting table 221, the return spring 323 is supported, and the return spring 323 is prevented from being separated from the ejection cavity 22 after being extruded.

In an embodiment of the present invention, referring to fig. 2 and fig. 3 again, the pull rod assembly 321 includes a pull rod 3211, a swinging member 3212 and an insert 3213, the pull rod 3211 is connected to the ejector block 31 and penetrates through the lower die base 2, and the return spring 323 is sleeved on the pull rod 3211; the swinging piece 3212 is connected to one end of the pull rod 3211 facing away from the ejector block 31; the plug-in member 3213 is movably abutted between the oscillating member 3212 and the lower die holder 2, and the air cylinder 322 is connected to one end of the plug-in member 3213, which is far away from the oscillating member 3212.

In this embodiment, the pull rod 3211 is cylindrical, one end of the pull rod 3211 is fixedly connected to the ejector block 31, the return spring 323 is sleeved at one end of the pull rod 3211 close to the ejector block 31, and the other end of the pull rod 3211 penetrates through the lower die base 2. The oscillating piece 3212 is fixedly connected to an end of the pull rod 3211 away from the ejector block 31, and the oscillating piece 3212 abuts against the lower die base 2. A guide surface 3213a is formed at one end of the insert 3213, and an included angle is formed between the extending direction of the guide surface 3213a and the lower surface of the lower die holder 2, that is, the guide surface 3213a is an inclined surface. One end of the plug-in member 3213, on which a guide surface 3213a is formed, is movably abutted between the swinging member 3212 and the lower die holder 2, and the guide surface 3213a is movably abutted to the swinging member 3212. The cylinder 322 is connected to an end of the insert 3213 facing away from the oscillating member 3212 to drive the insert 3213 in a reciprocating motion.

It can be understood that, when the upper die holder 1 drives the punch 11 to stretch and press the workpiece 4 to be processed, the limit groove 311 presses the return spring 323 in a direction close to the limit table 221, and the return spring 323 generates an elastic force and acts on the ejector block 31 under the supporting action of the limit table 221. Meanwhile, the air cylinder 322 is inflated, the air cylinder 322 pushes the plug-in piece 3213 to move in a direction approaching the oscillating piece 3212, the area of the contact between the guide surface 3123a and the oscillating piece 3212 is gradually increased, the oscillating piece 3212 is pushed to move in a direction away from the lower die base 2, so as to drive the pull rod 3211 to move along the ejector cavity 22, and the ejector block 31 is pulled to slide along the ejector cavity 22, so that the pressure F on the workpiece 4 to be processed is not changed.

After the punching is finished for one time, the upper die holder 1 drives the punch 11 to move along the direction deviating from the lower die holder 2, after the punch 11 leaves the ejection cavity 22, the air pressure of the air cylinder 322 is cut off, the ejection block 31 is restored to the initial position under the action of the spring 323, meanwhile, the ejection block 31 drives the pull rod 3211 to move, the pull rod 3211 pulls the swinging piece 3212 to move along the direction close to the lower die holder 2, so that the plug-in piece 3213 is extruded through the guide surface 3213a, and the plug-in piece 3213 moves to abut against the air cylinder 322 along the direction deviating from the swinging piece 3212, so as to wait for the next punching process.

The pulling rod 3212 is connected to the ejector block 31, so that the ejector block 31 can be conveniently pulled to slide along the ejector cavity 22. Through setting up swinging member 3212 and plug-in components 3213, drive power to cylinder 322 is driven to can change the effect direction of power, make overall structure simple, realize ejecting time delay function, improve production efficiency.

In an embodiment of the present invention, referring to fig. 2 and 3 again, the distance between the outer sidewall of the punch 11 and the inner sidewall of the ejection chamber 22 is smaller than the thickness of the workpiece 4 to be processed.

In this embodiment, the distance between the outer side wall of the punch 11 and the inner side wall of the ejection cavity 22 is smaller than the thickness of the workpiece 4 to be processed, that is, the workpiece 4 to be processed is subjected to negative clearance punch forming. It can be understood that, for example, the thickness of the workpiece 4 to be processed is 0.2mm, and the distance between the outer side wall of the punch 11 and the inner side wall of the ejection cavity 22, that is, the stretching gap is 0.15mm, so that the workpiece 4 to be processed can be fully punched and formed, and the stress range caused by punching and forming is effectively reduced. In other embodiments, the distance between the outer side wall of the punch 11 and the inner side wall of the ejection cavity 22 may also be set to other values, and may be set according to the actual size and production requirements of the workpiece 4 to be machined, and is not specifically limited.

In an embodiment of the present invention, referring to fig. 5 to 7 again, the lower die base 2 further includes a rigid pressing ring 23 and a flexible pressing ring 24, the rigid pressing ring 23 is located at the opening of the material ejection chamber 22, and the flexible pressing ring 24 is sleeved around the rigid pressing ring 23.

In this embodiment, the rigid pressing ring 23 is made of a die steel material, the lower bottom surface of the rigid pressing ring 23 abuts against the bottom wall of the processing tank 21 and is located at the opening of the material ejection cavity 22, and the rigid pressing ring 23 is rectangular and annular to fit the opening of the material ejection cavity 22. The inner side wall of the rigid pressing ring 23 is smoothly and transitionally connected with the upper top wall of the rigid pressing ring 23. In other embodiments, the rigid pressing ring 23 may also be configured in other shapes, and is configured according to actual production requirements, and is not particularly limited.

The flexible pressing ring 24 is made of polyethylene terephthalate (PET), the flexible pressing ring 24 is formed with a rectangular through hole matched with the rigid pressing ring 23, the rigid pressing ring 23 penetrates through the rectangular through hole to sleeve the flexible pressing ring 24 around the rigid pressing ring 23, and the lower bottom surface of the flexible pressing ring 24 abuts against the bottom wall of the processing groove 21.

It can be understood that the rigid pressing ring 23 is located at the opening of the ejection cavity 22, the flexible pressing ring 24 is sleeved around the rigid pressing ring 23, and the lower bottom surface of the rigid pressing ring 23 and the lower bottom surface of the flexible pressing ring 24 are abutted against the bottom wall of the processing tank 21. The workpiece 4 to be processed covers the rigid pressing ring 23 and the flexible pressing ring 24, the upper die base 1 drives the punch 11 to stretch and punch the workpiece 4 to be processed, and the structure of the workpiece 4 to be processed, which covers the opening of the material ejection cavity 22, is formed by punching.

After the primary punching is completed, the upper die base 1 drives the punch 11 to move along the direction departing from the lower die base 2, after the punch 11 leaves the ejection cavity 22, the air cylinder 322 cuts off the air pressure, and the ejection block 31 ejects the punched workpiece 4 out of the ejection cavity 22 under the action of the spring 323 and restores the workpiece to the initial position. And transferring the punched workpiece 4 out of the processing tank 21, and adding a new workpiece 4 to be processed into the processing tank 21 to cover the rigid pressing ring 23 and the flexible pressing ring 24 so as to wait for the next punching process.

Through setting up rigidity clamping ring 23 to improve the mobility of waiting to process work piece 4 in stamping forming process, through setting up flexible clamping ring 24, can treat the coefficient of friction who processes 4 stamping forming in-process of processing work piece and adjust, and through rigidity clamping ring 23 and flexible clamping ring 24's combined action, reduce and wait to process 4 stamping forming in-process stresses of work piece effect, make 4 non-deformable of work pieces after the shaping.

In an embodiment of the present invention, referring to fig. 5 to 7 again, the lower die base 2 is further provided with a pressing sheet 25, and the pressing sheet 25 is disposed on a side of the flexible pressing ring 24 away from the lower die base 2.

In this embodiment, the pressing sheet 25 is made of polyethylene terephthalate (PET), the surface area of the pressing sheet 25 is smaller than the surface area of the flexible pressing ring 24, and the number of the pressing sheets 25 is plural, that is, plural pressing sheets 25 are distributed on the flexible pressing ring 24 to change the local height of the flexible pressing ring 24. The number of the pressing sheets 25 in the embodiment is four, and the four pressing sheets 25 are distributed on the diagonal of the flexible pressing ring 24. In other embodiments, the number of the pressing sheets 25 can be set to other values, and is set according to actual production requirements, and is not particularly limited.

It can be understood that the lower surfaces of the rigid pressing ring 23 and the flexible pressing ring 24 are both abutted against the bottom wall of the processing groove 21, the four pressing sheets 25 are uniformly distributed on the flexible pressing ring 24 at intervals, and the lower surfaces of the pressing sheets 25 are abutted against the upper surface of the flexible pressing ring 24. The workpiece 4 to be processed covers the pressing sheet 25, the punch 11 is driven by the upper die base 1 to stretch and punch the workpiece 4 to be processed, and the structure of the workpiece 4 to be processed, which covers the opening of the material ejection cavity 22, is formed by punching.

After the one-time stamping forming is completed, the stamped workpiece 4 is transferred out of the processing tank 21, and a new workpiece 4 to be processed is added into the processing tank 21 to cover the pressing sheet 25 to wait for the next stamping process.

Through setting up preforming 25, can adjust the local height of flexible clamping ring 24, realize the not co-altitude combination of flexible clamping ring 24 for treat the stamping forming in-process of processing work piece 4, stress evenly distributed.

In an embodiment of the present invention, referring to fig. 1 to fig. 3 again, the upper die holder 1 further has a movable pressing block 12, the punch 11 is disposed through the movable pressing block 12, and the movable pressing block 12 is movably abutted against the periphery of the processing groove 21 to press the workpiece 4 to be processed.

In this embodiment, the upper die base 1 includes a gland 13, an upper cushion plate 14, a fixing plate 15, a stop plate 16 and a stripper plate 17 that are connected in sequence, and the stripper plate 17 is located at a side close to the lower die base 2. The movable pressing block 12 comprises a pressing block 121 and a pressing spring 122, the pressing block 121 is movably connected to the pressing cover 13 and sequentially penetrates through the upper backing plate 14, the fixing plate 15, the stop plate 16 and the discharging plate 17, and the pressing spring 122 abuts between the pressing cover 13 and the pressing block 121. The punch 11 is fixedly connected to the fixing plate 15 and penetrates through the swaging block 121. One end of the material pressing block 121, which is away from the material pressing spring 122, is movably abutted around the processing groove 21 so as to press the workpiece 4 to be processed.

The gland 13 is provided with four first guide posts 131, the number of the first guide posts 131 is four, two first guide posts 131 are in one group, and two groups of the first guide posts 131 are arranged on two opposite sides of the upper cushion plate 14. The stop plate 16 is provided with a plurality of stop springs 161, the stop springs 161 penetrate through the upper cushion plate 14 and the fixing plate 15 and abut between the gland 13 and the stop plate 16, and the plurality of stop springs 161 are uniformly distributed along the upper surface of the stop plate 16 at intervals.

In other embodiments, the number of the first guide pillars 131 may be set to be multiple, and the first guide pillars may be set according to the actual production requirement, and are not specifically limited, and a plurality of inner guide pillars may be further provided, and sequentially penetrate through the upper backing plate 14, the fixing plate 15, the stop plate 16, and the stripper plate 17 to align to the lower die holder 2, so as to perform limiting guidance on the gland 13 and avoid position deviation in the pressing process.

As can be understood, the workpiece 4 to be processed is covered above the pressing sheet 25, the pressing cover 13 drives the upper backing plate 14, the fixing plate 15, the stop plate 16 and the discharging plate 17 to move towards the direction close to the lower die base 2, the first guide pillar 131 is aligned with the corresponding position of the lower die base 2, so that the pressing block 121 can be aligned with the processing groove 21, and the punch 11 is aligned with the ejecting cavity 22 to perform the punch forming on the workpiece 4 to be processed. In the pressing process of the pressing cover 13, the pressing spring 122 is pressed to deform, and elasticity acts on the pressing block 121, so that the pressing block 121 can compress the workpiece 4 to be processed, and the position of the workpiece 4 to be processed in the stamping forming process is prevented from deviating.

Through setting up the material pressing block 121 and pressing the material spring 122, not only can compress tightly and treat processing work piece 4, still conveniently adjust the pressure of material pressing block to the better punching press condition of treating processing work piece 4 of adaptation.

In an embodiment of the present invention, referring to fig. 1 to 7 again, the lower die base 2 is further provided with a limiting assembly 26, and a limiting opening 261 is formed on a side of the limiting assembly 26 facing the processing groove 21 for limiting the workpiece 4 to be processed.

In this embodiment, the lower die base 2 includes a cavity plate 27, a lower backing plate 28 and a bottom plate 29 that are connected in sequence, the cavity plate 27 is located at one side close to the stripper plate 17, a processing groove 21 is arranged on the upper surface of the cavity plate 27, and the liftout cavity 22 sequentially penetrates through the cavity plate 27, the lower backing plate 28 and the bottom plate 29 to form. The ejector block 31 is positioned in the cavity plate 27, a limit table 221 is formed on one side of the bottom plate 29 close to the lower backing plate 28, the return spring 323 abuts between the limit groove 311 and the bottom plate 29, and the rigid pressing ring 23 is positioned at the cavity opening of the ejector cavity 22 and is integrally formed with the cavity plate 27.

The limiting component 26 comprises a screw plug 262, a limiting spring 263 and a limiting rod 264, the screw plug 262 is fixedly connected to the bottom plate 29, the limiting spring 263 penetrates through the bottom plate 29 and the lower backing plate 28 and abuts between the screw plug 262 and the limiting rod 264, and a limiting opening 261 is formed in one side of the limiting rod 264 facing the machining groove 21. The number of the limiting assemblies 26 is two, and the two limiting assemblies 26 are arranged on two opposite sides of the processing groove 21 to limit the workpiece 4 to be processed, so that the workpiece 4 to be processed can move forwards along the limiting port 261, and the deviation of the conveying direction of the workpiece 4 to be processed is avoided.

The side of the bottom plate 29 facing the pressing cover 13 is provided with a second guide post 291 matched with the first guide post 131, and a guide post spring 2911 is arranged around the second guide post 291 to generate elastic force when the first guide post 131 is pressed down, and when the first guide post 131 is separated, the guide post spring 2911 generates certain pushing force to the first guide post 131, which is helpful for separating the first guide post 131 from the second guide post 291, and improves the production efficiency.

Optionally, the stamping and forming die 100 further comprises a support base 5, the support base 5 being connected to a side of the bottom plate 29 facing away from the lower shim plate 28 for supporting the overall structure.

It can be understood that, the opposite two sides of the workpiece 4 to be processed are clamped into the two oppositely-arranged limiting openings 261, under the elastic action of the limiting spring 263, the limiting rod 264 is supported by the limiting spring 263 to support the workpiece 4 to be processed, the gland 13 drives the upper backing plate 14, the fixing plate 15, the stop plate 16 and the stripper plate 17 to move towards the direction close to the concave template 27, the first guide pillar 131 is aligned with the second guide pillar 291, so that the material pressing block 121 can be aligned with the processing groove 21, meanwhile, the material pressing block 121 presses the limiting rod 264, further, the workpiece 4 to be processed is pressed in the processing groove 21, the punch 11 is aligned with the material pressing cavity 22, and the workpiece 4 to be processed is subjected to punch forming.

In the process of pressing down the pressing cover 13, the pressing spring 122, the stop spring 161, the limiting spring 263 and the guide pillar spring 2911 are all compressed and deformed to press the workpiece 4 to be processed and punch-form the workpiece 4 to be processed. After the pressing process is completed, the pressing cover 13 drives the upper backing plate 14, the fixing plate 15, the stop plate 16 and the discharging plate 17 to move in the direction away from the cavity plate 27, and the pressing spring 122, the stop spring 161, the limiting spring 263 and the guide pillar spring 2911 all return to the initial state for the next press forming process.

The workpiece 4 to be processed can be a long strip-shaped PC film, one end of the PC film is aligned with the limiting opening 261 and covers the pressing sheet 25, the pressing block 121 presses the periphery of the PC film against the concave die plate 27 under the action of the pressing spring 122, the punch 11 is aligned with the PC film and presses down into the material ejecting cavity 22, the air cylinder 322 drives the plug-in component 3213 to move along the direction close to the swinging component 3212, so that the swinging component 3212 drives the pull rod 3211 to move downwards, and the plug-in component 31 and the punch 11 are pulled to move simultaneously, so that the PC film is subjected to uniform pressure. After the punching forming, the gland 13 drives the punch 11 to lift up, the long-strip-shaped PC film is conveyed forward for a certain distance, the non-punched PC film is aligned with the limiting opening 261 to be punched and formed, the steps are repeated in such a circulating mode until a PC film is completely punched and formed, a new PC film is replaced, and the punching and forming process is carried out again, so that a plurality of PC film forming products are obtained.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A punch forming die, comprising:

the upper die holder is provided with a punch;

2. The punch forming die set forth in claim 1, wherein the drive assembly comprises:

3. The stamping and forming die as claimed in claim 2, wherein the driving assembly further comprises a return spring, the return spring is sleeved at one end of the pull rod assembly located in the ejector cavity, and two ends of the return spring are respectively elastically abutted between the ejector block and the bottom wall of the ejector cavity.

4. The punch forming mold according to claim 3, wherein the ejector block is provided with a limiting groove, the inner wall of the ejector cavity is provided with a limiting table, one end of the return spring is accommodated in the limiting groove, and the other end of the return spring abuts against the limiting table.

5. The punch forming die of claim 3, wherein the tie rod assembly comprises:

6. The punch forming die according to any one of claims 1 to 5, wherein a distance between an outer side wall of the punch and an inner side wall of the ejector chamber is smaller than a thickness of the workpiece to be processed.

7. The punch forming die of claim 6, wherein the lower die holder is further provided with a rigid pressing ring and a flexible pressing ring, the pressing ring is located at the opening of the ejection cavity, and the flexible pressing ring is sleeved around the rigid pressing ring.

8. The punch forming die of claim 7, wherein the lower die base is further provided with a pressing sheet, and the pressing sheet is arranged on one side of the flexible pressing ring, which faces away from the lower die base.

9. The punch forming die according to claim 6, wherein the upper die holder is further provided with a movable pressing block, the punch is arranged through the movable pressing block, and the movable pressing block is movably abutted around the processing groove to press the workpiece to be processed.

10. The punch forming die of claim 9, wherein the lower die base is further provided with a limiting component, and a limiting opening is formed on one side of the limiting component facing the processing groove so as to limit the workpiece to be processed.