阅读说明：本技术 一种冲压模组及其工作方法 (Stamping module and working method thereof ) 是由 张永伟 李华 于 2020-04-01 设计创作，主要内容包括：本发明公开了一种冲压模组及其工作方法,包括：连接驱动机构的冲压桶,冲压桶的下方为模具型腔,型腔用于冲压制备壳体,型腔表面设有板材,冲压桶的内腔中设有通过绳索相连接的上压板和下压板,上压板和下压板能够在冲压桶内进行往复滑移；下压板的上表面设有容池,容池内装有非牛顿流体,下压板下表面连接冲压头,下压板的下表面设置至少两组泵机；当冲压头接触板材时,通过向容池中泵入或者泵出物料改变非牛顿流体的组分配比,从而调整冲压头的力度,使得板材能够在不发生断裂的情况下快速成型。本发明所涉及的一种冲压模组通过在冲压设备的部件中设置非牛顿流体来进行时效性的缓冲,从而保护了脆性板材和设备,提高了冲床的调节精度。(The invention discloses a stamping module and a working method thereof, wherein the stamping module comprises the following steps: the stamping barrel is connected with the driving mechanism, a die cavity is arranged below the stamping barrel and used for stamping the prepared shell, plates are arranged on the surface of the die cavity, an upper pressing plate and a lower pressing plate which are connected through a rope are arranged in the inner cavity of the stamping barrel, and the upper pressing plate and the lower pressing plate can slide in the stamping barrel in a reciprocating manner; the upper surface of the lower pressing plate is provided with a containing pool, non-Newtonian fluid is filled in the containing pool, the lower surface of the lower pressing plate is connected with a stamping head, and the lower surface of the lower pressing plate is provided with at least two groups of pump machines; when the punching head contacts the plate, the component proportion of the non-Newtonian fluid is changed by pumping materials into or out of the containing pool, so that the force of the punching head is adjusted, and the plate can be quickly formed without breaking. According to the stamping module, the non-Newtonian fluid is arranged in the part of the stamping equipment to buffer the stamping time effectively, so that the brittle plates and the equipment are protected, and the adjustment precision of a punch is improved.)

1. A stamping die set, comprising: a stamping barrel connected with the driving mechanism, a die cavity is arranged below the stamping barrel and used for stamping the shell, plates are arranged on the surface of the die cavity,

an upper pressing plate and a lower pressing plate which are connected through a rope are arranged in an inner cavity of the stamping barrel, and the upper pressing plate and the lower pressing plate can slide in the stamping barrel in a reciprocating manner;

the upper pressing plate is provided with a through hole, the lower surface of the upper pressing plate is provided with a plurality of top pillars, and the end faces of the free ends of the top pillars are flush;

the upper surface of the lower pressing plate is provided with a containing pool, non-Newtonian fluid is filled in the containing pool, the lower surface of the lower pressing plate is connected with a punching head, and the lower surface of the lower pressing plate is provided with at least two groups of pump machines;

when the punching head contacts the plate, the component proportion of the non-Newtonian fluid is changed by pumping materials into or out of the containing pool, so that the force of the punching head is adjusted, and the plate can be quickly formed without breaking.

2. A stamping die set according to claim 1, wherein: each jacking column consists of a middle jacking rod and a plurality of rings of telescopic barrels on the periphery of the jacking rod.

3. A stamping die set according to claim 2, wherein: two circles of telescopic barrels are arranged outside the ejector rod, and the size of the contact surface between the free end face of the ejector column and the non-Newtonian fluid is adjusted by adjusting the telescopic state of the ejector rod or each circle of telescopic barrel.

4. A stamping die set according to claim 3, wherein: the end parts of the telescopic barrels with the same diameter are all embedded on the same sleeve plate.

5. The stamping die set of claim 4, wherein: and a containing bag is arranged between the sleeve plates, non-Newtonian fluid is mixed in the containing bag, and the containing bag is connected with an external pump.

6. A stamping die set according to claim 1, wherein: the side wall of the punching barrel is transparent, and the top column is provided with scales.

7. A stamping die set according to claim 1, wherein: the pump is provided with three groups, one group is used for pumping out non-Newtonian fluid, the other two groups are used for pumping in non-Newtonian fluid, the concentration of the non-Newtonian fluid pumped in one group is larger than that of the non-Newtonian fluid in the containing pool, and the concentration of the non-Newtonian fluid pumped in the other group is smaller than that of the non-Newtonian fluid in the containing pool.

8. A stamping die set according to claim 1, wherein: a plurality of yarn forming nets are laid in the containing pool, and adjacent yarn forming nets are arranged at intervals.

9. The method of operating a stamping die set according to any of claims 1-8, comprising the steps of:

(1) taking a sample plate to be tested for stamping test, adjusting the area of the free end surface of the top column to be the maximum, and gradually reducing the area until determining the critical value of the force when the sample plate under the die set stamping is broken;

(2) placing a plate on the cavity for fixing, and injecting a certain amount of non-Newtonian fluid into the punching barrel;

(3) in an initial state, the upper pressure plate is punched at a slow speed, and the punching pressure degree is adjusted according to a critical value in a punching test;

(4) the composition ratio of the non-Newtonian fluid in the cosmetic tank is adjusted by a pump.

10. An operating method according to claim 9, wherein the jack-posts are partially depressed or sprung up at the end face while the speed of the upper platen is changed or the pump is operating.

Technical Field

The invention relates to the field of die manufacturing technology and stamping dies, in particular to a stamping die set.

Background

The stamping is a forming method in which a press and a die are used to apply external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) of a desired shape and size. Stamping and forging are plastic working (or called pressure working), and are called forging and pressing. The stamped blanks are mainly hot and cold rolled steel sheets and strips. In the world, 60-70% of steel materials are plates, and most of the plates are punched to form finished products. The body, chassis, oil tank, radiator sheet, boiler steam drum, shell of container, iron core silicon steel sheet of motor and electric appliance are all made by punching. There are also a large number of stamped parts in products such as instruments, household appliances, bicycles, office machines, and household utensils. The die used for stamping is called stamping die, and is called stamping die for short. A die is a special tool for batch processing of material (metallic or non-metallic) into the desired punches.

However, in the practical use of the punching die, the conventional buffer spring cannot protect the brittle sheet material from aging in the process of processing the brittle material, and the sheet material can be broken in the process of punching.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a stamping module and a working method thereof.

In order to achieve the purpose, the invention adopts the technical scheme that: a stamping die set, comprising: the stamping device comprises a stamping barrel connected with a driving mechanism, wherein a die cavity is arranged below the stamping barrel and used for stamping a preparation shell, plates are arranged on the surface of the die cavity, an upper pressing plate and a lower pressing plate which are connected through a rope are arranged in an inner cavity of the stamping barrel, and the upper pressing plate and the lower pressing plate can slide in the stamping barrel in a reciprocating manner; the upper pressing plate is provided with a through hole, the lower surface of the upper pressing plate is provided with a plurality of top pillars, and the end faces of the free ends of the top pillars are flush; the upper surface of the lower pressing plate is provided with a containing pool, non-Newtonian fluid is filled in the containing pool, the lower surface of the lower pressing plate is connected with a punching head, and the lower surface of the lower pressing plate is provided with at least two groups of pump machines; when the punching head contacts the plate, the component proportion of the non-Newtonian fluid is changed by pumping materials into or out of the containing pool, so that the force of the punching head is adjusted, and the plate can be quickly formed without breaking.

In a preferred embodiment of the invention, each top column consists of a middle top rod and a plurality of rings of telescopic barrels on the periphery of the top rod.

In a preferred embodiment of the invention, two circles of telescopic barrels are arranged outside the ejector rod, and the size of the contact surface between the free end surface of the ejector column and the non-Newtonian fluid is adjusted by adjusting the telescopic state of the ejector rod or each circle of telescopic barrel.

In a preferred embodiment of the present invention, the end portions of the telescopic barrels having the same diameter are embedded in the same deck.

In a preferred embodiment of the invention, a containing bag is arranged between the sleeve plates, non-Newtonian fluid is mixed in the containing bag, and the containing bag is connected with an external pump.

In a preferred embodiment of the present invention, the side wall of the stamping barrel is transparent, and the top pillar is provided with scales.

In a preferred embodiment of the invention, the pump is provided with three groups, one group is used for pumping out the non-Newtonian fluid, and the other two groups are used for pumping in the non-Newtonian fluid, wherein the concentration of the non-Newtonian fluid pumped in one group is greater than that of the non-Newtonian fluid in the containing pool, and the concentration of the non-Newtonian fluid pumped in the other group is less than that of the non-Newtonian fluid in the containing pool.

In a preferred embodiment of the invention, a plurality of gauze elements are laid in the containing pool, and adjacent gauze elements are arranged at intervals.

In order to achieve the purpose, the invention adopts another technical scheme as follows: a working method of a stamping die set comprises the following steps: (1) taking a sample plate to be tested for stamping test, adjusting the area of the free end surface of the top column to be the maximum, and gradually reducing the area until determining the critical value of the force when the sample plate under the die set stamping is broken; (2) placing a plate on the cavity for fixing, and injecting a certain amount of non-Newtonian fluid into the punching barrel; (3) in an initial state, the upper pressure plate is punched at a slow speed, and the punching pressure degree is adjusted according to a critical value in a punching test; (4) the composition ratio of the non-Newtonian fluid in the cosmetic tank is adjusted by a pump.

In a preferred embodiment of the present invention, the knock-out pin is depressed or bounced partially at the end surface while the speed of the upper platen is changed or the pump is operated.

The invention solves the defects in the background technology, and has the following beneficial effects:

(1) according to the stamping module, the non-Newtonian fluid is used as a buffer medium, the concentration of the non-Newtonian fluid in the stamping module is dynamically adjusted in the stamping process, or the contact duration of the upper pressure plate and the containing pool is used for buffering and offsetting partial acting force by using the characteristics of the non-Newtonian fluid, and the brittle sheet material and the equipment are dynamically protected to prevent the brittle sheet material from being broken due to overlarge surface stress.

(2) The impact force of a lower pressing plate in a stamping die is adjusted through the change of the area of the free end face of a top column on an upper pressing plate in a stamping die set, so that the stamping force of a stamping head on the lower pressing plate on a die cavity is changed.

(3) The invention adjusts different precisions through the area change of the free end surface of the top column and the change of the non-Newtonian fluid in the containing pool, thereby testing the critical point of the impact pressure degree required by the fracture of the plate, ensuring that the plate cannot fracture through the combined application of the area and the fluid in the actual processing process, and simultaneously improving the processing precision of the module.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 is a schematic view of a press tub construction of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of the upper and lower platens inside the ram barrel of the preferred embodiment of the present invention;

FIG. 3 is an exploded view of the stem lifter structure of the preferred embodiment of the present invention;

FIG. 4 is a perspective view of the construction of the lower platen of the preferred embodiment of the present invention;

figure 5 is a perspective view of a preferred embodiment of the punch head of the present invention approaching the mold cavity.

In the figure: 1. an upper pressure plate; 2. a lower pressing plate; 3. a through hole; 4. a top pillar; 5. a pool is contained; 6. punching a head; 7. a top rod; 8. a telescopic barrel; 9. sheathing; 10. the barrel is stamped.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention.

Fig. 1 shows a schematic structural diagram of a stamping barrel 10 of the present invention, which relates to a stamping die set, including: the stamping barrel 10 is connected with the driving mechanism, a die cavity is arranged below the stamping barrel 10 and used for stamping a prepared shell, plates are arranged on the surface of the die cavity, an upper pressing plate 1 and a lower pressing plate 2 which are connected through a rope are arranged in an inner cavity of the stamping barrel 10, and the upper pressing plate 1 and the lower pressing plate 2 can slide in the stamping barrel 10 in a reciprocating mode; the upper pressing plate 1 is provided with a through hole 3, the lower surface of the upper pressing plate 1 is provided with a plurality of top pillars 4, and the free end surfaces of the top pillars 4 are flush; the upper surface of the lower pressing plate 2 is provided with a containing pool 5, the containing pool 5 is filled with non-Newtonian fluid, the lower surface of the lower pressing plate 2 is connected with a stamping head 6, and the lower surface of the lower pressing plate 2 is provided with at least two groups of pump machines; when the punching head 6 contacts the plate, the component proportion of the non-Newtonian fluid is changed by pumping materials into or out of the containing pool 5, so that the force of the punching head 6 is adjusted, and the plate can be quickly formed without breaking.

It should be noted that the cross-sectional shape of the punching barrel 10 is illustrated as circular or square, and the basic figure is mainly used to reduce the friction of parts in the whole module machining process. The components that power the upper platen 1 are not shown. The die cavity and the sheet material on the surface of the die cavity are not shown, wherein the shape of the die cavity can refer to the shape of the stamping head 6, and the sheet material has no specific structural requirement. The upper platen 1 and the lower platen 2 in the punching barrel 10 are herein considered only for the slide punching in the vertical direction, the punching under inclination or angle variation, and further definition of the well 5 is required. The punching press head 6 that the 2 lower surfaces of holding down plate are connected is responsible for contact model panel to its punching press, panel are located the mould die cavity, and panel acquiescence is square board, has certain fragility, and is breakable, so the in-process of punching press needs abundant the dynamics of ensureing its punching press.

The whole stamping barrel 10 of the stamping module in fig. 1 is located right above the die cavity, the side wall of the stamping barrel 10 is fixed and supported by a collar, and an upper pressure plate in the stamping barrel 10 is powered by a driving mechanism (the shape is similar to that of a punch press) at the top of the stamping barrel so as to be capable of reciprocating up and down in the stamping barrel 10. The top drive as well as the collar etc. in the figure are connected to the support plate, which can be replaced according to the actual type of equipment. Meanwhile, the rod body connected with the supporting plate can be used for conveying electric power or non-Newtonian fluid on the stamping die set. The module below is equipped with the mould die cavity, and the edge circumference of mould is equipped with spacing clamp, when mould die cavity surface is arranged in to fragile panel, fixes panel through spacing clamp to by the in-process that becomes of punching press type gradually at panel, panel because the card of spacing clamp hinders, holistic range of movement can not be too obvious, then panel can the relatively stable by punching press deformation.

The upper pressing plate 1 and the lower pressing plate 2 are both positioned in the punching barrel 10, a transmission rod connected with the upper surface of the upper pressing plate 1 and a rod body connected with the lower surface of the lower pressing plate 2 can partially extend out of the punching barrel 10, the moving range of the upper pressing plate 1 and the lower pressing plate 2 in the punching barrel 10 is limited, corresponding sliding grooves and protruding blocks are arranged on the side wall edges of the upper pressing plate 1 and the lower pressing plate 2 and the side wall of an inner cavity of the punching barrel 10, so that the moving range of the upper pressing plate 1 and the lower pressing plate 2 is limited, ropes are circumferentially arranged on the edges of the upper pressing plate 1 and the lower pressing plate 2, when the upper pressing plate 1 moves upwards under the lifting of an external driving mechanism, the upper pressing plate 1 can lift the lower pressing plate 2 through the ropes, elastic components such as cushion pads are arranged on the edges of the lower pressing plate 2, so that the lower pressing plate 2 has a distance with the bottommost part of the moving range, this process is repeated in sequence to form the stamping of the present die set. The upper pressing plate 1, the lower pressing plate 2 and part of components are arranged coaxially with the punching barrel 10 as much as possible, and mutual friction in the moving process can be reduced.

Fig. 2 shows a schematic structural diagram of an upper pressing plate 1 and a lower pressing plate 2 in an inner cavity of a punching barrel 10, as shown in fig. 2, a through hole 3 is formed in the upper pressing plate 1, a top pillar 4 is arranged on the lower surface of the upper pressing plate 1, the free end face of the top pillar 4 is flush, a containing pool 5 is arranged on the upper surface of the lower pressing plate 2, non-newtonian fluid is contained in the containing pool 5, a punching head 6 is connected to the lower surface of the lower pressing plate 2, at least two groups of pump machines are arranged on the lower surface of the lower pressing plate 2, and the pump machines are not necessarily fixed on the lower pressing plate 2 and can be.

The structure of the punching head 6 and the structure of the die cavity are shown in fig. 5, the punching head below is over against the plate, the plate covers over the die cavity, and the edge of the die is provided with a limiting clamp for the plate to be obviously displaced when the plate is punched, so that the originally punched area enters other cavity areas to be punched again, and the plate at the moment has a high probability of being directly processed as a defective product. The shape of the convex block arranged on the end face of the bottom of the stamping head is matched with the shape of the die cavity relatively.

In the process that the upper pressure plate 1 is driven by the driving mechanism to be pressed downwards, the ejection column 4 with the flush free end face is contacted with the non-Newtonian fluid in the containing pool 5, and the hardness of the non-Newtonian fluid rises due to the fast impact speed, so that the punching force provided by the upper pressure plate 1 can be subjected to rigid buffering to a certain degree. Impulse at the tank 5, that is, momentum increment Δ P ═ Ft, where F is instantaneous pressure formed by the upper platen 1 dropping rapidly under the driving of the driving mechanism, t is specific duration of action of the upper platen 1, and under the initial state, that is, under the condition that the non-newtonian fluid in the tank 5 with the rest concentration is not introduced, the following parameters are provided:

contact duration t(s)	Degree of deformation L (%) -of the cell 5
		0.1-0.2	1-5
0.2-0.4	6-15
		0.4-0.6	15-35
>0.6	>40

Since the free end faces of the top posts 4 are relatively flush, the area S of all the end faces_D＝S_dN, wherein S_dThe surface area of the end face of a single top pillar 4, and N is the number of the top pillars 4. Namely, the longer the contact time is, the larger the deformation degree of the containing pool 5 is, the smaller the buffering of the corresponding stamping force is, and the contact time of the corresponding ejection column and the non-Newtonian fluid can be controlled by adjusting the running power and the stamping speed of the driving mechanism. The quantity and concentration of the non-Newtonian fluid in the containing pool 5 are adjusted by the pump machines externally connected with the lower surface of the lower pressing plate 2, at least one group of pump machines is responsible for pumping out, and is responsible for pumping in addition, and the non-Newtonian fluid needs a certain stirring time, so that the pumping-out or pumping-in process is relatively slow. In a preferred embodiment of the invention, the pump is provided with three groups, one group is used for pumping out the non-Newtonian fluid, the other two groups are used for pumping in the non-Newtonian fluid, the concentration of the non-Newtonian fluid pumped in one group is greater than that of the non-Newtonian fluid in the containing pool 5, the concentration of the non-Newtonian fluid pumped in the other group is less than that of the non-Newtonian fluid in the containing pool 5, and the concentration adjustment is relatively slow and small in amplitude change, and can be used for fine adjustment. The non-Newtonian fluid is a mixture of corn starch and water, and the non-Newtonian fluid refers to a fluid which does not meet the Newton viscosity experimental law, namely the fluid of which the shear stress and the shear strain rate are not in a linear relation. Non-newtonsFluids are widely found in life, production and nature. Most biological fluids belong to the non-newtonian fluids now defined. In humans, many body fluids such as blood, lymph, cystic fluid, and "semifluid" such as cytoplasm are non-newtonian fluids.

The concentration of the non-newtonian fluid referred to herein is the percentage of corn starch to the total amount of water and corn starch. Although the corn starch and the water are used as raw materials, the corn starch and the water are not suitable for being directly injected, and the corn starch and the water are required to be repeatedly mixed and kneaded in the process of stamping to adjust the concentration correspondingly and make the concentration of the whole uniform, so that the corn starch or the water are obviously not suitable for being directly injected, and the non-Newtonian fluids with different concentrations are directly injected, the components are the same, but the proportions of the components have certain difference, and the components are mixed from the outside and then pumped, so that the concentration change time of the non-Newtonian fluid in the containing pool 5 is shortened, and the working efficiency during stamping is improved. After the non-Newtonian fluid in the tank 5 is impacted by the top pillar 4 from the upper pressure plate 1, the impact speed is higher, the impact contact area is smaller, the formed buffer degree is smaller, and the force of the impact force received by the punching head 6, the cavity, the plate material and the like is larger.

When the punching head 6 contacts the plate, the component proportion of the non-Newtonian fluid is changed by pumping materials into or out of the containing pool 5, so that the force of the punching head 6 is adjusted, and the plate can be quickly formed without breaking. It should be noted that each top pillar 4 is composed of a top rod 7 at the middle part and a plurality of telescopic barrels 8 at the periphery of the top rod 7, and the number of the telescopic barrels 8 is two. The size of the contact surface between the free end surface of the top column 4 and the non-Newtonian fluid is adjusted by adjusting the telescopic state of the top rod 7 or each circle of telescopic barrel 8.

It should be noted that, the area adjustment here mainly utilizes the sleeve plate 9, the sleeve plate 9 itself can be completely attached to the upper platen 1, the sleeve plate 9 is also provided with through holes 3 with the same number and diameter at positions corresponding to the through holes 3 on the upper platen 1, and the through holes 3 are used for ensuring that the space between the upper platen 1 and the lower platen 2 is in a non-sealed state. The size of each ejector rod is the same, the area of the free end part of each ejector rod is S1, the area of the free end face of the first circle of telescopic barrels 8 outside each ejector rod is S2, the area of the free end face of the second circle (namely the outer side of the first circle) of telescopic barrels 8 outside each ejector rod is S3, the first circle of telescopic barrels 8 are all fixed on the first sleeve plate 9 closest to the lower surface of the upper pressure plate 1, and the second circle of telescopic barrels 8 are all fixed on the second sleeve plate 9 (next to the first) away from the lower surface of the upper pressure plate 1. The two sleeve plates 9 are mutually attached, the containing bag is arranged between the sleeve plates 9 (the containing bag can also be embedded on the surfaces of the sleeve plates 9), and the distance between the sleeve plates 9 and the upper pressure plate 1 can be increased along with the increase of the amount of non-Newtonian fluid mixed in the containing bag. When the plugging of the non-Newtonian fluid filling hole in the containing bag is smooth and almost no non-Newtonian fluid exists in the containing bag, the free end surfaces of the rod body, the first circle of telescopic barrel 8 and the second circle of telescopic barrel 8 are ensured to be flush, namely the free end surface area S1+ S2+ S3 of the ejector rod is the largest, and the impact force transmitted to the punching head 6 is the smallest under the driving of the same power. When different amounts of non-Newtonian fluid are filled into the containing bags on different sleeve plates 9, the telescopic barrels 8 are lifted, so that the area of the end face begins to be reduced, and the impact force transmitted to the punching head 6 is gradually increased.

The area of the free end surface of the top column 4 can be changed by adjusting the non-Newtonian fluid storage amount of the containing bags on different sleeve plates 9. The filling hole of the containing bag is defaulted to be a one-way valve, and the non-Newtonian fluid in the containing bag can be discharged by opening a corresponding passage. The concentration of the non-Newtonian fluid in the whole device can be readjusted after water injection as long as the internal non-Newtonian fluid does not have drastic change of physicochemical properties. It can be understood that, in order to ensure that the operation of the inner upper pressing plate 1 and the inner lower pressing plate 2 is performed smoothly, the inner part needs to be visualized, that is, the sidewall of the punching barrel 10 is transparent, and the top pillar 4 is provided with scales (not shown), so that the deformation condition of the inner part can be conveniently observed from the periphery of the punching barrel 10. When the non-newtonian fluid is not uniformly mixed or is not mixed to bear corresponding impact, the fluid in the tank 5 may splash to the side wall of the stamping barrel 10, thereby causing the outside to mistakenly estimate the internal tank 5, so a plurality of screens can be laid in the tank 5, and the adjacent screens are arranged at intervals, and can be distributed in parallel in the vertical direction, that is, the adhesion or blocking effect of each layer of screen can make the non-newtonian fluid in the tank 5 not easily splash in large quantity, thereby playing the roles of buffering and fixing the non-newtonian fluid. Locking the vast majority of the non-newtonian fluid. It should be noted that the transparency of the sidewall of the ram barrel 10 ensures the observation of the non-newtonian fluid in the tank 5, and at the same time, the amount of the non-newtonian fluid splashed from the sidewall is controlled, so as to reversely push out the mixing degree of the non-newtonian fluid, which is fed back to the stirring device in the external pump of the module, thereby ensuring the relatively uniform concentration of the non-newtonian fluid pumped into the module.

As shown in fig. 3, each sleeve plate 9 is provided with a through hole 3 and a telescopic barrel 8 corresponding to the upper position of the upper press plate 1, each sleeve plate 9 can be sequentially sleeved on the lower surface of the upper press plate 1, and is sleeved on the ejector rod through the telescopic barrel 8, it needs to be described that the upper surface of the first sleeve plate 9 is fixedly connected with the lower surface of the upper press plate 1, the expansion and the telescopic of the first sleeve plate 9 itself do not make the sleeve plate 9 fall off from the upper press plate 1, and the same setting is conducted between the other sleeve plates 9. The clearance between the ejector rod and the telescopic barrel 8 in the invention is negligible, and in fact, the end face distance between the ejector rod and the telescopic barrel 8 is not more than 5cm, namely the whole end face area is an instantaneous value, after the ejector rod is contacted for a period of time, the ejector rod can be partially sunk into non-Newtonian fluid, if the ejector column 4 is partially sunk into the non-Newtonian fluid, the speed and frequency required by a punching module can be reduced due to the fact that part of the ejector column 4 is sunk into the non-Newtonian fluid in the process of lifting the upper pressure plate 1, and the lifting of the telescopic barrel 8 can be periodically adjusted in the process of impacting the end face in the punching process, so that the separation of the telescopic barrel 8 from the non-Newtonian fluid is accelerated.

It should be noted that, the impact force to the mold cavity in the whole device is sequentially: power change > concentration change of the container 5 > area change of the end face of the top column 4. That is, the output power of the driving mechanism can be directly adjusted in a large range in the whole debugging process, and after the approximate range of the output power is determined, the concentration change of the containing pool 5 and the change of the end surface area of the top column 4 are further accurately debugged. The plate is fixed and simultaneously detected on the plate or the area where the plate is located, the real-time monitoring of the fracture degree of the plate is ensured, the stamping is a relatively continuous process, so that a plurality of sample plates with the same specification are required to be synchronously tested when corresponding fractures are collected, the pressure plate is verified within a certain time, and all parameters of accurate time, power and the like of the fractures are gradually determined, namely a plurality of stamping heads 6 can be connected on the same lower pressure plate 2,

the working method of the stamping die set comprises the following steps:

(1) taking a sample plate to be tested for stamping test, adjusting the area of the free end surface of the top column 4 to be maximum, and gradually reducing the area until determining the critical value of the force when the sample plate under the die set stamping is broken;

(2) placing the plate on the cavity for fixing, and injecting a certain amount of non-Newtonian fluid into the punching barrel 10;

(3) in an initial state, the upper pressure plate 1 is punched at a slow speed, and the punching pressure degree is adjusted according to a critical value in a punching test;

(4) the composition ratio of the non-Newtonian fluid in the volume pool 5 is adjusted by a pump.

It is noted that the brittleness, structural strength, etc. of the test sheet material used herein are similar to those of the sheet material to be processed in the present application. The area of the free end face of the top column 4 is adjusted to be the maximum, namely, the non-Newtonian fluid is not introduced into the containing bag in the sleeve plate 9, so that the non-Newtonian fluid in the containing pool 5 of the lower pressure plate 2 is ensured to keep the initial concentration unchanged, and the concentration adjustment of the non-Newtonian fluid in the containing pool 5 is not performed temporarily. Under certain power, the condition that the template on the die cavity below the stamping barrel 10 is partially broken and the condition that the template is partially not broken can be ensured, so that the module approaches and obtains the critical value of the force when the corresponding template is broken in the process of changing the area of the end surface of the free end of the top column 4, and after multiple times of debugging, if the concentration of non-Newtonian fluid in the containing pool 5 or the power and the like are adjusted, the corresponding critical value is collected, and the parameters of all parts of the current module are obtained. And finishing the critical value of the impact force of the primary sample plate during fracture and non-fracture.

As shown in fig. 4, a passage is arranged at the bottom of an inner cavity in the containing pool on the upper surface of the lower pressure plate, the passage is directly connected to a pump and a liquid storage mechanism hung on the lower surface of the lower pressure plate, the pump and the liquid storage mechanism in fig. 4 are represented by a single square, and a resistance piece is arranged on the default passage of the containing pool, so that the non-newtonian fluid in the containing pool cannot flow into the pump by itself when the pump is in a non-working state.

After the punching test, the plate is placed in the cavity, fixed by a robot arm or the like, and the non-newtonian fluid having the same concentration as that in the test stage is injected into the punching barrel 10. The drive mechanism begins to gradually increase the power output and adjust the degree of impulse pressure based on recorded thresholds, such as power adjustment, surface area of the top post 4 and concentration of non-newtonian fluid in the reservoir 5. When the speed of the upper pressure plate 1 changes or the pump works, the top column 4 partially sinks or bounces, and the fluid in the containing pool 5 can be impacted to a certain degree by the lifting change of the telescopic barrel 8 on the top column 4 while the power change and the concentration change are carried out, so that the homogenization of the non-Newtonian fluid in the containing pool 5 is promoted.

The stamping die set mainly determines corresponding parameters through a stamping force degree critical point obtained by early-stage pressure test when a plate is broken, determines initial running power by adjusting the power of a driving mechanism, and controls the buffer degree of the upper pressing plate 1 impacting non-Newtonian fluid by finely adjusting the area of the non-Newtonian fluid in the containing pool 5 or the free end face of the top column 4 on the upper pressing plate 1.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.