Blanking die

Abstract

The invention discloses a blanking die and relates to the technical field of stamping dies, in the blanking die, a pressing inner core is fixed to the middle of an upper die base, a punch-die ring is arranged outside the pressing inner core and can move in the vertical direction relative to the upper die base, an insert ring is arranged on the outer side of the punch-die, and the lower end of the insert protrudes out of the pressing inner core to form a blanking part; the male die corresponds to the material pressing inner core, the female die is fixed to the lower die base, the floating top table is located between the male die and the female die and has a floating stroke in the vertical direction, and a first position flush with the male die and the female die and a second position lower than the male die and the female die are arranged in the floating stroke of the floating top table; the air blowing assembly is used for blowing air after the lower die assembly and the upper die assembly are opened, and due to the fact that the height difference exists between waste materials and finished parts after stamping is completed, after the blanking die is opened, the air blowing assembly works, the waste materials can be blown away, and the finished parts can also be blown away after the finished parts float upwards. The product stability is high and the production speed is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stamping die, in particular to a blanking die. BACKGROUND

[0002] For the processing of metal parts, especially parts with small thickness, the traditional processing method is generally in the form of cutting and thickness grinding combination, such as the process form of laser cutting first and then thickness grinding, and there is also a form of wire cutting in part of the traditional process, but this cutting and grinding combination method is complex, time-consuming and high in cost, and the product yield is low. SUMMARY

[0003] The main purpose of the present application is to provide a blanking die, which combines die blanking and blowing system in the product forming link, has high product processing stability, high yield and fast production speed.

[0004] To achieve the above purpose, the present application provides a blanking die, comprising: An upper die assembly, comprising an upper die seat, an insert, a punch and die, and a pressure material core, the pressure material core is fixed to the middle part of the upper die seat, the punch and die is arranged in a ring shape and is arranged outside the pressure material core, and can move up and down relative to the upper die seat, the insert is arranged in a ring shape and is fixed to the upper die seat, and is arranged outside the punch and die, and the lower end of the insert protrudes from the pressure material core to form a blanking part; A lower die assembly located below the upper die assembly, comprising a lower die seat, a punch, a die, and a floating top table, the punch is fixed to the middle part of the lower die seat and corresponds to the pressure material core, the die is arranged in a ring shape and is arranged outside the punch, the die is fixed to the lower die seat, and the upper end surface of the die is flush with the upper end surface of the punch, the floating top table is arranged in a ring shape and is located between the punch and the die and has an up and down floating stroke, the floating top table corresponds to the punch and die, and in the floating stroke of the floating top table, there is a first position flush with the punch and die, and a second position lower than the punch and die; A blowing assembly for blowing after the lower die assembly and the upper die assembly are opened to blow the finished part and / or waste material away; After the upper die assembly and the lower die assembly are closed and the material belt is pressed, part of the material belt is cut off by the blanking part to obtain a first part placed on the floating top table and the punch, the punch and die move downward to drive the floating top table to switch from the first position to the second position, the first part is separated to obtain a finished part and waste material, the finished part is in the gap between the punch and the die, and the waste material is on the punch.

[0005] In an embodiment, the upper end surface of the punch is provided with an air suction hole for connecting an external negative pressure air pipe, and the air suction hole is used for adsorbing waste materials.

[0006] In an embodiment, the lower die assembly further comprises: a push plate located below the floating top platform and movable in the up-down direction, the upper end surface of the push plate is provided with a push rod, and the push rod is used to abut against the floating top platform; a plurality of floating blocks arranged in intervals and abutting against the lower end surface of the push plate, and the lower end of each floating block is connected to the lower die seat through a first elastic member; a plurality of first pressing rods corresponding to the plurality of floating blocks, the lower end of each first pressing rod is fixedly connected to the corresponding floating block through the push plate, and the upper end of each first pressing rod protrudes out of the concave die; The floating blocks push the push plate upward so that the push rod on the push plate abuts against the floating top platform, thereby keeping the floating top platform in the first position; The first pressing rods press the floating blocks downward so that the push plate is spaced apart from the floating top platform, and the floating top platform can be pushed by the punch and concave die to the second position.

[0007] In an embodiment, the lower die assembly further comprises: a lower die matching plate annularly arranged outside the concave die and fixed to the lower die seat, an upper-end-opened material dropping groove is formed on the lower die matching plate, and the material dropping groove is used for connecting the outside; a separation block movably installed to the lower die seat in the up-down direction, the upper end of the separation block extends in the direction of the punch to form an extension arm, and the separation block has a first material discharging position and a second material discharging position in its movable stroke; When the separation block is at the first material discharging position, the extension arm covers the material dropping groove, and the air blowing assembly is used to blow the waste materials away from the punch; When the separation block is at the second material discharging position, the extension arm is located above the punch and forms a material feeding gap with the material dropping groove, and the air blowing assembly is used to blow the finished parts from the material feeding gap into the material dropping groove.

[0008] In an embodiment, the lower end of the separation block is connected to the lower die seat through a second elastic member, the upper die assembly comprises a second pressing rod fixed opposite to the upper die seat, the lower end of the second pressing rod protrudes downward from the material pressing inner core, and the second pressing rod is used to abut against the separation block during the closing process of the upper die assembly and the lower die assembly; and / or, The lower end surface of the extension arm is downwardly inclined in the direction away from the punch.

[0009] In an embodiment, two first grooves are concavely formed on the lower die fitting plate, and the two first grooves are respectively arranged on two opposite sides of the blanking groove in the horizontal direction; The lower die assembly further comprises two limiting blocks, and the two limiting blocks are respectively arranged in the two first grooves. The lower end of each limiting block is connected by a third elastic member, so that the limiting block can protrude out of the first groove under the action of elastic force or be accommodated in the first groove under the action of pressure.

[0010] In an embodiment, the bottom wall or the side wall of the blanking groove is provided with a gap for communicating with the outside; A blowing passage is formed on the lower die fitting plate, the gas outlet of the blowing passage communicates with the blanking groove and is arranged towards the gap, and the gas inlet of the blowing passage is used for communicating with an external gas source.

[0011] In an embodiment, the blowing assembly comprises a fitting member arranged on the lower die seat. A first airflow passage is formed in the fitting member. The fitting member is provided with a blowing hole communicating with the first airflow passage towards the side surface of the concave die. A second airflow passage communicating with the first airflow passage is formed on the lower die seat, and the second airflow passage is used for communicating with an external gas source.

[0012] In an embodiment, the fitting member is floatingly installed on the lower die seat in the up-down direction, so as to be able to protrude upwards out of the concave die under the action of elastic force or be flush with the concave die downwards under the action of pressure; and / or, The blowing holes are arranged at intervals.

[0013] In an embodiment, the second airflow passage comprises a main flow channel and two branch flow channels communicating with the main flow channel and arranged in parallel. The main flow channel communicates with the first airflow passage. The two branch flow channels are used for communicating with an external gas source, and the gas inlets of the two branch flow channels are arranged differently. The blowing assembly further comprises two limiting rods movably installed on the lower die seat in the up-down direction. The two limiting rods correspond to the two branch flow channels respectively and can be sealingly matched with the branch flow channels. The lower end of each limiting rod is installed by a fourth elastic member. The two limiting rods are both provided with a communication hole, and the height of the two communication holes is arranged differently. After the upper die assembly and the lower die assembly are combined, the two limiting rods seal the two branch flow channels respectively; During the separation of the upper die assembly and the lower die assembly, the two limiting rods are upward under the action of elastic force, so that the two communication holes are sequentially moved to communicate with the corresponding branch flow channels, so that the second airflow passage is conducted.

[0014] In an embodiment, the male and female dies are matched by an inclined surface, the upper die assembly further comprises a driving ejector pin, the driving ejector pin is located above the male and female dies and is movably installed on the upper die seat in the up-down direction, and the driving ejector pin is used to drive the male and female dies to move downward; and / or, The male and female dies are concavely provided with guide grooves on two opposite sides in the horizontal direction, the upper die assembly further comprises a reset structure, the reset structure comprises two insertion blocks, the two insertion blocks are separately inserted into the two guide grooves, and the lower ends of the two insertion blocks are connected to the lower die seat or the insert by an elastic reset member, so that the male and female dies can be pushed upward by the elastic force to reset.

[0015] In an embodiment, the blanking die further comprises a plurality of material supporting assemblies, the plurality of material supporting assemblies are spaced apart in a first horizontal direction, each material supporting assembly comprises two material supporting rods oppositely arranged in a second horizontal direction, the sides of the two material supporting rods facing each other are concavely provided with clamping grooves, the sidewalls of each clamping groove in the first horizontal direction are throughly provided, for the material belt to pass through, and the lower ends of the two material supporting rods are movably installed on the lower die seat.

[0016] In the technical scheme, when the material belt reaches the die, the floating top platform is located at the first position and is flush with the male die and the female die, and the male and female dies are flush with the insert and the material pressing inner core. The upper die assembly and the lower die assembly are driven by the punch press to be matched, at the same time of being matched, the blanking part cuts off part of the material belt to obtain a first part, at this time, the first part is on the floating top platform and the male die, then the male and female dies move downward, and the floating top platform moves downward to the second position under the force, so that the first part is broken to obtain a finished part and waste material, the annular finished part falls together with the floating top platform, and is in the gap between the male die and the female die, and the waste material remains on the male die. Because there is a height difference between the waste material and the finished part after the stamping is completed, after the blanking die is opened, the air blowing assembly works, and the waste material can be blown away, or the finished part can be blown away after being floated up under the driving of the floating top platform. The air blowing assembly can work intermittently, so that the finished part and the waste material are sequentially blown away by the height difference. The product has high stability, high yield and fast production speed. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0018] Figure 1 A cross-sectional view of an embodiment of the blanking die provided by the present application is shown in the figure. Figure 2 Fig. 4 is a schematic view of a cross section of the upper die assembly (one angle) of the punch die; Figure 1 Figure 3 Fig. 5 is a schematic view of a cross section of the upper die assembly (another angle) of the punch die; Figure 1 Figure 4 Fig. 6 is a schematic view of a cross section of the middle push plate and the floating block of the punch die; Figure 1 Figure 5 Fig. 7 is a schematic view of a structure of the first pressure rod, the floating block and the floating top platform of the punch die; Figure 1 Figure 6 Fig. 8 is a schematic view of a structure of the limiting rod and the lower die plate of the punch die; Figure 1 Figure 7 Fig. 9 is a schematic view of a structure of the main runner and the branch runner of the punch die; Figure 1 Figure 8 Fig. 10 is a schematic view of a structure of the separation block and the limiting block of the punch die; Figure 1 Figure 9 Fig. 11 is a schematic view of a structure of the insert block and the punch-die of the punch die; Figure 1 Figure 10 Fig. 12 is a schematic view of a structure of the driving top rod and the punch-die of the punch die; Figure 1 Figure 11 Fig. 13 is a schematic view of a structure of the material supporting rod and the material belt of the punch die; Figure 1 Figure 12 Fig. 14 is a schematic view of a structure of the blanking die in the continuous punching equipment. Figure 1

[0019] Brief Description of the Drawings: 100, blanking die; 1, upper die assembly; 11, upper die seat; 12, insert; 121, blanking part; 13, punch-die; 131, guide groove; 14, material pressing inner core; 15, second pressure rod; 16, driving top rod; 17, insert block; 2, lower die assembly; 21, lower die seat; 22, punch; 221, air suction hole; 23, die; 24, floating top platform; 25, push plate; 251, push rod; 26, floating block; 260, first elastic member; 27, first pressure rod; 28, lower die matching plate; 281, blanking groove; 282, limiting block; 283, air blowing passage; 29, separation block; 290, material feeding gap; 291, extension arm; 3, air blowing assembly; 31, matching member; 311, air blowing hole; 321, main runner; 322, branch runner; 33, limiting rod; 330, communication hole; 4, material supporting assembly; 41, material supporting rod; 411, material clamping groove; 200, material belt.

[0020] ​​​​​​​​​​​The objectives, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0022] It should be noted that if the embodiments of the present application involve directional indications, the directional indications are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0023] In addition, if the embodiments of the present application involve descriptions such as "first", "second" and the like, the descriptions of "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0024] For the processing of metal parts, especially parts with small thickness, the traditional processing method is generally in the form of combination of cutting and thickness grinding, for example, the process form of laser cutting first and then thickness grinding, and there is also a form of wire cutting in some traditional processes. However, this cutting and grinding combination method is complex, time-consuming, high in cost, and low in product yield.

[0025] Especially for the mass production demand of stainless steel precision blanking 1 / 2 material thickness ring-shaped products with a plate thickness of 0.35 mm and above, the technical solution of the present application replaces the traditional machining production process, solves the problems of complex process, low yield and high cost of the traditional processing method, improves the production yield, improves the product stability, and reduces the production cost.

[0026] The present application provides a blanking die which can be used alone according to product processing requirements or applied in a continuous composite die stamping process. Through die design and air separation technology, the traditional wire cutting / laser cutting machining process is replaced to realize efficient, low-cost mass production.

[0027] Please refer to Figures 1 to 3 , the blanking die 100 comprises an upper die assembly 1, a lower die assembly 2 and a blowing assembly 3, the upper die assembly 1 comprises an upper die seat 11, an insert 12, a punch-die 13 and a pressure material core 14, the pressure material core 14 is fixed to the middle part of the upper die seat 11, the punch-die 13 is arranged in a ring shape and is arranged outside the pressure material core 14 and can move up and down relative to the upper die seat 11, the insert 12 is arranged in a ring shape, is fixed to the upper die seat 11 and is arranged outside the punch-die 13, the lower end of the insert 12 protrudes from the pressure material core 14 to form a blanking part 121; the lower die assembly 2 is located below the upper die assembly 1 and comprises a lower die seat 21, a punch 22, a die 23 and a floating top table 24, the punch 22 is fixed to the middle part of the lower die seat 21 and corresponds to the pressure material core 14, the die 23 is arranged in a ring shape and is arranged outside the punch 22, the die 23 is fixed to the lower die seat 21 and the upper end surface of the die 23 is flush with the upper end surface of the punch 22, the floating top table 24 is arranged in a ring shape, is located between the punch 22 and the die 23 and has an up-down floating stroke, the floating top table 24 corresponds to the punch-die 13, in the floating stroke of the floating top table 24, there is a first position flush with the punch 22 and the die 23 and a second position lower than the punch 22 and the die 23; the blowing assembly 3 is used to blow after the lower die assembly 2 and the upper die assembly 1 are opened to blow the finished parts and / or waste away; after the upper die assembly 1 and the lower die assembly 2 are closed and the material belt 200 is pressed tightly, part of the material belt 200 is cut off by the blanking part 121 to obtain a first part placed on the floating top table 24 and the punch 22, the punch-die 13 moves downward to drive the floating top table 24 to switch from the first position to the second position, the first part is separated to obtain a finished part and waste, the finished part is in the gap between the punch 22 and the die 23, and the waste is on the punch 22.

[0028] It should be noted that the upper die seat 11 and the lower die seat 21 are used to be fixed with the top plate and the bottom plate of the stamping machine respectively, and the upper die seat 11 and the lower die seat 21 can be a single plate or a plurality of plates arranged in layers.

[0029] The technical scheme of the present application is that the material belt 200 reaches the die mold, at this time the floating top table 24 is located at the first position and is flush with the punch 22 and the die 23, the punch-die 13 is flush with the insert 12 and the material pressing inner core 14. The upper die assembly 1 and the lower die assembly 2 are driven by the punch machine to cooperate with each other, at the same time of closing, the blanking part 121 cuts off part of the material belt 200 to obtain the first part, at this time the first part is on the floating top table 24 and the punch 22, then the punch-die 13 moves downward and the floating top table 24 moves downward to the second position, so that the first part is broken to obtain the finished part and the waste material, the annular finished part falls together with the floating top table 24, so as to be in the gap between the punch 22 and the die 23, and the waste material remains on the punch 22. Because there is a height difference between the waste material and the finished part after the stamping is completed, after the die 100 is opened, the blowing assembly 3 works, which can blow the waste material away, or after the finished part is floated up under the driving of the floating top table 24, the finished part is blown away. The blowing assembly 3 can work intermittently, so that the finished part and the waste material are blown away in turn according to the height difference. The product has high stability, high yield and fast production speed.

[0030] The punch-die 13 and the blanking part 121 move in a short interval, so that the rapid blanking can be ensured.

[0031] According to different products and blanking requirements, the shape and height of the blanking part 121 can be set differently, and the structure of the punch-die 13 can also be set differently. In the embodiment, the positioning column is arranged on the material pressing inner core 14, and the corresponding positioning groove is arranged on the punch 22.

[0032] After the finished part and the waste material are separated from the die, the punch-die 13 and the floating top table 24 are reset. After the material belt 200 is moved for a distance, the die is closed again.

[0033] The technical scheme of the present application is mainly aimed at the blanking process of metal parts, and does not limit the specific material of the metal material belt 200, for example, the product material SUS301 (relatively low chromium-nickel content), hardness state 3 / 4H; SUS304 (common and general stainless steel), hardness state H, hardness value HV370; product material SUS301 (relatively low chromium-nickel content), hardness state 1 / 2H; SUS304 (common and general stainless steel), hardness state 3 / 4H, hardness value HV310; SUS306L (low carbon-nitrogen strengthened austenitic stainless steel), hardness state 3 / 4H, hardness value HV250, etc.

[0034] Please refer to Figure 12When the blanking die 100 is applied in a continuous composite die stamping process, initially, a plurality of die structures are installed on a stamping machine, and the die structure at the end is the blanking die 100 of the present scheme, and the material belt 200 enters the blanking die 100 after being punched and shaped by the die structure of the previous work station. The stamping and molding sequence of the material belt 200 in turn through the plurality of die structures on the stamping machine is: product allowance rough cutting (1.2T~3 / 4T, T is the material thickness of the finished part), product allowance fine cutting (0.07mm~0.20mm), finished part and waste separation. According to the size and shape of different products, the number of product allowance rough cutting and product allowance fine cutting can be set to multiple times.

[0035] Please refer to Figure 2 The upper end face of the punch 22 is provided with an air suction hole 221, and the air suction hole 221 is used for communicating with an external negative pressure air pipe and is used for adsorbing waste. After the finished part and the waste in the inner ring are separated, the air suction hole 221 works to adsorb and fix the waste on the punch 22, so that the waste can be prevented from being adsorbed on the upper die after the mold is opened. Because if the waste is adsorbed on the upper die, it may be difficult to discharge or unable to discharge, which requires manual sorting or increases the mechanical hand to pick up and sort. By fixing the waste on the punch 22 through the negative pressure mechanism, the waste can be discharged through the air blowing assembly 3, which is more convenient and fast.

[0036] The air suction hole 221 is provided with a plurality of air suction holes 221 corresponding to different waste shapes of different products, and the plurality of air suction holes 221 can be arranged in a straight line, can be arranged in a circumferential direction of the punch 22, or can be arranged in an array, and the present application does not limit this.

[0037] The floating top table 24 should have three states during the conversion of the two positions; the first is that the floating top table 24 corresponds to downward movement and cooperation when the punch and die 13 move downward; the second is that the floating top table 24 actively drives the finished part to float upward; and the third is that the floating top table 24 is flush with the punch 22 and the die 23 to contact the material belt 200 together.

[0038] In the present embodiment, please refer to Figures 4 to 5The lower die assembly 2 further comprises a push plate 25, a plurality of floating blocks 26 and a plurality of first pressing rods 27. The push plate 25 is located below the floating top table 24 and is movably mounted to the lower die seat 21 in the up-down direction. The upper end surface of the push plate 25 is provided with a push rod 251 which is used to abut against the floating top table 24. The plurality of floating blocks 26 are arranged in intervals and abut against the lower end surface of the push plate 25. The lower end of each floating block 26 is connected to the lower die seat 21 through a first elastic member 260. The plurality of first pressing rods 27 correspond to the plurality of floating blocks 26. The lower end of each first pressing rod 27 is fixedly connected to the corresponding floating block 26 through the push plate 25. The upper end of each first pressing rod 27 protrudes out of the concave die 23. In this structure, the downward movement of the floating top table 24 is driven by the male and female dies 13. The upward driving is driven by the first elastic member 260 and the floating block 26. When the first pressing rod 27 is pushed downward, the push rod 251 is in a position state where the floating top table 24 is separated. The position conversion of the floating top table 24 can be controlled only by the actions of mold opening and closing, without the need to separately set a driving mechanism.

[0039] Based on the above embodiment, when the upper die assembly 1 and the lower die assembly 2 are separated from each other, the floating blocks 26 abut against the push plate 25 under the action of the elastic force. At this time, the push plate 25 abuts against the floating top table 24, so that the floating top table 24 is kept in the first position. At this time, the upper end of the first pressing rod 27 protrudes out of the concave die 23. After the upper die assembly 1 and the lower die assembly 2 are closed, at least one of the upper die seat 11 and the insert 12 can abut against the first pressing rod 27 and drive the first pressing rod 27 to move downward against the elastic force. Thus, it will not affect the closing process of the upper die assembly 1 and the lower die assembly 2. At the same time, the downward movement of the first pressing rod 27 causes the floating blocks 26 to be pressed downward, so that there is a certain distance between the floating blocks 26 and the push plate 25. Based on the frictional fit between the floating top table 24 and the male die 22 and the concave die 23, the floating top table 24 is still in the first position, but is suspended and no longer subjected to the upward force. At this time, when the male and female dies 13 move downward, the floating top table 24 is passively pushed downward by the pressure of the male and female dies 13, so as to be converted to the second position. When the upper die assembly 1 and the lower die assembly 2 are opened again, the first pressing rod 27 is no longer subjected to external force. Therefore, under the action of the elastic force, the floating blocks 26 and the first pressing rod 27 move upward. The floating blocks 26 provide an upward force to the push plate 25, so that the push rod 251 of the push plate 25 drives the floating top table 24 to reset to the first position.

[0040] It should be understood that the first pressing rod 27 and the push plate 25 are matched through shaft holes. The first pressing rod 27 is provided with at least two, corresponding to the diagonal positions of the push plate 25, so as to ensure force balance. In this embodiment, the first pressing rod 27 is provided with four, corresponding to the four corners of the push plate 25.

[0041] The number and arrangement of the push rods 251 are determined according to the shape and size of the floating top table 24.

[0042] The floating top table 24 is matched with the concave die 23 through the slope, which can provide the guide for the lifting of the floating top table 24 and ensure that the floating top table 24 has enough friction force when being suspended.

[0043] Considering the positioning and matching of the push plate 25 and the floating block 26, a plurality of stepped grooves are arranged on the push plate 25, and the floating block 26 is in contact with the upper wall surface of the corresponding stepped groove.

[0044] In other embodiments, the floating top table 24 can also be achieved through the push rod 251 and the gear and rack matching, which is not described in detail.

[0045] Further, the lower die seat 21 and / or the concave die 23 should be provided with corresponding hollow structures to facilitate the arrangement of the floating block 26, the push plate 25 and other structures, in order to limit the position of the first pressing rod 27 after resetting, the first pressing rod 27 is arranged in the upward direction with the gradually increasing outer diameter, to form the step surface arranged upwardly, when the step surface moves to the corresponding die plate, the first pressing rod 27 reaches the limit position, at this time, the upper end of the first pressing rod 27 protrudes from the concave die 23.

[0046] Please refer to Figure 1 and Figure 6The lower die assembly 2 further comprises a lower die fitting plate 28 and a separation block 29. The lower die fitting plate 28 is annularly arranged outside the female die 23 and fixed to the lower die seat 21. An open-top blanking groove 281 is formed on the lower die fitting plate 28, and the blanking groove 281 is used for communicating with the outside. The separation block 29 is movably installed to the lower die seat 21 in the up-down direction. The upper end of the separation block 29 extends in the direction of the male die 22 to form an extension arm 291. The separation block 29 has a first discharging position and a second discharging position in its movable stroke. That is, the separation block 29 is in the shape of an inverted L, which can meet the functions of installation and covering of the blanking groove 281. The separation block 29 can be entirely arranged in the blanking groove 281, that is, it can be lifted along the blanking groove 281, or it can be installed based on other positions on the lower die fitting plate 28, and the extension arm 291 extends above the blanking groove 281. Specifically, when the separation block 29 is at the first discharging position, the extension arm 291 covers the blanking groove 281, and the blowing assembly 3 is used for blowing the waste away from the male die 22. At this time, the position of the extension arm 291 in the up-down direction is not higher than the male die 22, so that the waste is not blocked when it is blown away. In the embodiment, the extension arm 291 is flush with the male die 22, and it can be used as a discharging channel for the waste when the waste is discharged. When the separation block 29 is at the second discharging position, the extension arm 291 is above the male die 22, and a feeding gap 290 is formed between the extension arm 291 and the blanking groove 281. The blowing assembly 3 is used for blowing the finished part into the blanking groove 281 from the feeding gap 290. At this time, the finished part is blown to move in the lateral direction, and after it enters the feeding gap 290, the extension arm 291 can be used as a cover to prevent the finished part from flying out, thereby ensuring its falling action to the blanking groove 281. The floating arrangement of the separation block 29 can meet the blowing of the waste and the finished part at the same time.

[0047] The separation block 29 can be provided with a corresponding driving mechanism to enable it to move up and down actively, thereby switching between two positions. In this embodiment, the lower end of the separation block 29 is connected to the lower die seat 21 through a second elastic member. The upper die assembly 1 includes a second pressing rod 15, which is fixed opposite to the upper die seat 11. The lower end of the second pressing rod 15 protrudes downward from the material pressing inner core 14. The second pressing rod 15 is used to abut against the separation block 29 during the clamping process of the upper die assembly 1 and the lower die assembly 2. Initially, the separation block 29 is floated above the material falling groove 281 by the elastic force. During clamping, the second pressing rod 15 presses the separation block 29, so that it is lower than the male die 22, thus not affecting the clamping action of the mold. When the mold is just opened, the upper die assembly 1 moves upward by a small amount. At this time, the insert 12 and the female die 23 have a certain gap therebetween, the male and female dies 13 are reset, and the second pressing rod 15 is still in contact with the separation block 29. At this time, the separation block 29 is floated to be flush with the male die 22, and the floating top platform 24 is still in the second position. At this time, the air blowing assembly 3 works, and the waste material can be blown out of the gap between the upper die assembly 1 and the lower die assembly 2. As the upper die assembly 1 continues to float upward, the second pressing rod 15 is separated from the separation block 29, and the separation block 29 is reset upward. The floating top platform 24 is reset to the first position. At this time, the air blowing assembly 3 works, and the finished product can enter the material falling groove 281 from the material gap 290. In this way, the position change of the separation block 29 can be realized only by the clamping and opening actions of the mold. The associated cooperation between the parts can avoid the setting of an active driving structure.

[0048] Specifically, a groove structure can be provided on the female die 23 and the lower die matching plate 28 corresponding to the floating installation of the separation block 29.

[0049] Furthermore, the lower end surface of the extension arm 291 is inclined downward in a direction away from the male die 22. When the extension arm 291 is in the second material discharging position, the material gap 290 is trumpet-shaped based on the inclined surface of the extension arm 291, which facilitates material feeding, so that the inclined surface of the extension arm 291 can provide material guiding.

[0050] In order to avoid the finished parts and waste materials from being scattered during the blowing movement, in this embodiment, please refer to Figure 7 and Figure 8The lower die assembly 2 further comprises two limiting blocks 282, which are arranged in the two first recesses respectively, and the lower end of each limiting block 282 is connected by a third elastic member, so that the limiting block 282 can protrude from the first recess under the action of elastic force or be accommodated in the first recess under the action of pressure. The two limiting blocks 282 are pressed downward by the corresponding modules in the upper die assembly 1 and thus are accommodated in the two first recesses, without interfering with the clamping of the mold. After the upper die assembly 1 and the lower die assembly 2 are separated, the two limiting blocks 282 can elastically float upward by a certain height, and the limiting passage between the two limiting blocks 282 is defined when the separating block 29 is in the first discharging position. The blowing direction of the blowing assembly 3 is consistent with the extension direction of the limiting passage, so that the waste material can be blown away along the limiting passage. When the separating block 29 is in the second discharging position, the limiting passage defined by the two limiting blocks 282 is in communication with the material inlet gap 290, so that the finished part is blown along the limiting passage, thereby ensuring that the discharging material moves in a specified direction without scattering.

[0051] The side surfaces of the two limiting blocks 282 facing each other are away from each other in the direction of the punch 22, that is, the limiting passage is arranged in a trumpet shape.

[0052] Further, the limiting blocks 282 can cooperate with the separating block 29, the extension arm 291 is arranged between the two limiting blocks 282, and the width of the main body of the separating block 29 is greater than the width of the limiting passage.

[0053] The finished part needs to be collected after being separated from the lower die assembly 2. Ideally, the finished part falls into an external material box after passing through the material falling groove 281, but considering that the thickness of the finished part is thin, if static electricity occurs, the finished part will be adhered to the groove wall of the material falling groove 281 and cannot be discharged. Therefore, in the embodiment, referring to Figure 1 and Figure 7 , the bottom wall or the side wall of the material falling groove 281 is provided with a gap for communication with the outside; the lower die clamping plate 28 is formed with a blowing passage 283, the gas outlet of the blowing passage 283 is in communication with the material falling groove 281 and is arranged towards the gap, and the gas inlet of the blowing passage 283 is used to connect an external gas source. The gas inlet end of the blowing passage 283 is connected to a gas pipe joint, so as to be connected to an external gas pipe through a gas pipe. By the blowing passage 283, the finished part entering the material falling groove 281 can be blown again, so as to ensure that the finished part can flow out of the gap and be collected into the material box.

[0054] It should be noted that, according to the setting position of the gap, the blowing passage 283 can extend in the upward and downward direction or extend obliquely.

[0055] The blowing assembly 3 is arranged to blow the waste material and the finished part out of the mold. In this embodiment, please refer to Figures 6 to 7 The blowing assembly 3 comprises a fitting part 31 arranged on the lower mold base 21. The fitting part 31 is internally formed with a first air flow channel. The fitting part 31 is arranged with a blowing hole 311 communicating with the first air flow channel and facing the side surface of the female mold 23. The lower mold base 21 is formed with a second air flow channel communicating with the first air flow channel. The second air flow channel is used to communicate with an external air source.

[0056] In this embodiment, the fitting part 31 is directly integrated into the mold structure, thereby reducing the distance between the blowing hole 311 of the fitting part 31 and the material to be discharged, and improving the discharging effect. The second air flow channel is an internal air duct. The air flow is injected into the second air flow channel through the air pipe joint. The air flow is guided through the first air flow channel extending in the up-down direction, thereby completing the blowing action through the laterally arranged blowing hole 311.

[0057] It should be noted that the fitting part 31 should protrude from the male mold 22 during use, thereby ensuring the blowing range. Therefore, a avoiding groove can be arranged at the corresponding position in the upper mold assembly 1, thereby avoiding the mold closing interference problem of the fitting part 31. In this embodiment, the fitting part 31 is floatingly installed to the lower mold base 21 in the up-down direction, so as to be able to protrude upwardly from the female mold 23 under the action of the elastic force, or be flush with the female mold 23 under the action of the pressure. In this way, during mold closing, the fitting part 31 can be pressed to overcome the elastic force and be accommodated in the recess, without affecting the mold closing cooperation. After the mold is opened, the fitting part 31 can be automatically popped out under the action of the rebound force, thereby ensuring the air outlet effect.

[0058] Specifically, the fitting part 31 can be movably installed in the recess by a spring. It should be understood that after the fitting part 31 floats upwardly, the fitting part 31 should be sealingly cooperated with the recess. After the air flow of the second air flow channel is guided into the recess, the air flow leakage can be avoided, thereby ensuring that the air flow can enter the first air flow channel and be discharged.

[0059] According to the adhesion degree and range of the material and the mold, the blowing holes 311 are arranged at intervals, i.e. after the air is introduced into the first air flow channel, the air is evenly divided and enters the plurality of blowing holes 311, thereby increasing the blowing range and ensuring the uniformity of the blowing.

[0060] Since the sizes of the finished part and the waste material are different, the contact areas with the corresponding molds are different, and thus the adhesion forces are different. Especially when the waste material is fixed on the male mold 22 by external negative pressure, the blowing of the waste material also needs to overcome the negative pressure adhesion force. Therefore, in this embodiment, please refer to Figure 7, in order to solve the problem of different air volume when waste and finished parts are discharged, the second airflow channel includes a main flow channel 321 and two branch flow channels 322 connected with the main flow channel 321 and arranged in parallel, the main flow channel 321 is connected with the first airflow channel, and the two branch flow channels 322 are used to connect external air sources and have different air inlet volumes; the two branch flow channels 322 are respectively connected with two air pipe joints and connected with different air sources. The blowing assembly 3 includes two limiting rods 33, the limiting rods 33 are movably installed on the lower die seat 21 along the up-down direction, the two limiting rods 33 are respectively corresponding to the two branch flow channels 322 and can be sealingly matched with the branch flow channels 322, the lower ends of the two limiting rods 33 are respectively installed through a fourth elastic member, the two limiting rods 33 are both provided with communication holes 330, and the heights of the two communication holes 330 are different; the two limiting rods 33 are floatingly matched and can be squeezed when the mold is closed, so that interference with the mold closing is avoided, the heights of the two limiting rods 33 are consistent, but the positions of the communication holes 330 of the two limiting rods 33 are different, the external air source is always in a state of air supply, and the air outlet volume of the blowing hole 311 can be adjusted according to the matching state difference between the upper mold assembly 1 and the lower mold assembly 2 and the height difference of the upper mold assembly 1. This does not need to frequently adjust the switch of the external air source in the production process, and can also avoid setting an electromagnetic valve at the air pipe joint. The structure is simple.

[0061] Specifically, after the upper mold assembly 1 and the lower mold assembly 2 are closed, the two limiting rods 33 block the two branch flow channels 322, at this time, the two branch flow channels 322 are both blocked, the blowing hole 311 does not blow air, even if the two branch flow channels 322 are both connected with the external air source, it will not affect the mold processing process, during the separation process of the upper mold assembly 1 and the lower mold assembly 2, the two limiting rods 33 are upwardly squeezed by the elastic force, because the heights of the two communication holes 330 are different, one of the two communication holes 330 is connected with the corresponding branch flow channel 322 first, the other branch flow channel 322 is blocked, so that the second airflow channel is conducted, at this time, the blowing hole 311 blows air with a first air volume to blow off the waste, after the upper mold assembly 1 stays at the height for a certain period of time, the waste discharge action is completed, then the upper mold assembly 1 continues to be lifted, the other communication hole 330 is connected with the corresponding communication hole 330, the previously connected branch flow channel 322 is blocked, so that the second airflow channel is conducted, at this time, the blowing hole 311 blows air with a second air volume to blow off the waste, after the upper mold assembly 1 stays at the height for a certain period of time, the finished part discharge action is completed, then the upper mold assembly 1 is lifted to the completely open mold state.

[0062] It should be noted that when the waste is fixed by negative pressure adsorption on the convex mold 22, the air inlet volume of the corresponding branch flow channel 322 needs to overcome the negative pressure adsorption force, and the air flow of the corresponding air pipe joint is greater than that of the negative pressure system.

[0063] The difference in the air flow of the two branch passages 322 can be realized by the difference in the diameters of the two branch passages 322 or by the difference in the air inlet amount.

[0064] For the upper die assembly 1, please refer to Figure 10 The up-and-down movement of the punch-die 13 is realized by active driving. Specifically, the punch-die 13 is matched with the insert 12 through a slope, thereby ensuring that the punch-die 13 and the insert 12 have a good guiding effect. The upper die assembly 1 further includes a driving top rod 16. The driving top rod 16 is located above the punch-die 13 and is movably mounted to the upper die seat 11 in the up-and-down direction. The driving top rod 16 is used to drive the punch-die 13 to move downward.

[0065] In some embodiments, please refer to Figure 1 and Figure 9 The driving top rod 16 is fixedly connected with the punch-die 13, thereby actively driving the punch-die 13 to move downward and upward. Considering the assembly and replacement of the mold, in this embodiment, the punch-die 13 is concavely provided with a guiding groove 131 on the two opposite sides in the horizontal direction. The upper die assembly 1 further includes a reset structure. The reset structure includes two insertion blocks 17. The two insertion blocks 17 are respectively inserted into the two guiding grooves 131. The lower ends of the two insertion blocks 17 are respectively connected with the lower die seat 21 or the insert 12 through an elastic reset member, so as to be able to push the punch-die 13 upward by the elastic force. The downward movement of the punch-die 13 can be actively driven by the driving top rod 16. The punch-die 13 drives the insertion blocks 17 to move downward together. After the driving work is completed, the driving top rod 16 is reset. At this time, the punch-die 13 is not subjected to the acting force. The insertion blocks 17 are subjected to the elastic force, thereby being able to drive the punch-die 13 to move upward and downward.

[0066] It should be noted that the insertion blocks 17 are always inserted into the two guiding grooves 131.

[0067] The material belt 200 has a certain length and can be a roll material. Therefore, after each stamping is completed, the material belt 200 needs to be driven to move a distance. In this embodiment, please refer to Figure 8 and Figure 11The blanking die 100 further comprises a plurality of material supporting assemblies 4, which are spaced apart along a first horizontal direction, each of the material supporting assemblies 4 comprises two material supporting rods 41 oppositely arranged along a second horizontal direction, the side surfaces of the two material supporting rods 41 towards each other are concavely provided with clamping grooves 411, each of the clamping grooves 411 is through-provided along the side wall of the first horizontal direction for the clamping of the material belt 200, and the lower ends of the material supporting rods 41 are floatingly installed to the lower die seat 21. During the processing, the material belt 200 is always clamped and positioned by the clamping grooves 411, and when the material belt 200 is driven to move, it can move in the clamping grooves 411. When the die is opened, each of the material supporting rods 41 is floated upward, so that the material belt 200 is separated from the lower die assembly 2, and the material belt 200 is driven to move and does not interfere with the corresponding structure on the lower die assembly 2. When the die is closed, the material belt 200 is driven to move downward, and the material supporting rods 41 are pressed to move downward, so that the material belt 200 is prevented from moving due to the height difference with the material supporting rods 41 during the stamping process.

[0068] In the technical scheme of the present application, the air blowing assembly 3, the air suction hole 221 for fixing the waste material through the negative pressure effect, and the separation block 29 for separating the finished product parts and the waste material are combined, so that the blanking forming of the product is finally realized.

[0069] In addition, the upper die assembly 1 and the lower die assembly 2 should be provided with corresponding guide structures, for example, the guide column and the guide groove 131, and the present application does not make detailed description on this.

[0070] Please refer to Figure 1 In the embodiment, the processing process of the blanking die 100 is as follows: the upper die assembly 1 and the lower die assembly 2 are separated, at this time, the separation block 29, the first pressing rod 27, the limiting block 282, the matching piece 31, the limiting rod 33 and the material supporting rod 41 are all floated upward. The upper die assembly 1 is moved downward to close the die with the lower die assembly 2, the second pressing rod 15 abuts against the separation block 29 to float downward, and the first pressing rod 27, the limiting block 282, the matching piece 31, the limiting rod 33 and the material supporting rod 41 are pressed downward by the corresponding die plate.

[0071] After the stamping is completed and the die is opened, the upper die assembly 1 is at the first stopping height, the punch and the die 13 are reset upward, the floating top table 24 is at the second position, the separation block 29 is at the first discharging position, the material supporting rod 41 is floated upward, the communication hole 330 of one of the limiting rods 33 is communicated with the corresponding branch channel 322, and the waste material is discharged. The upper die assembly 1 is lifted to the second stopping height, the floating top table 24 is at the first position, the separation block 29 is at the second discharging position, the communication hole 330 of the other limiting rod 33 is communicated with the corresponding branch channel 322, the finished product part enters the discharging groove 281, and the air blowing channel 283 blows air to discharge the finished product part to the material box outside the die.

[0072] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

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

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

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

4. The blanking die of claim 1, wherein, The lower die assembly further comprises: a lower die matching plate annularly arranged outside the die and fixed to the lower die seat, the lower die matching plate being provided with a blanking groove with an open upper end, and the blanking groove being used for connecting an external part. The separating block is movably mounted to the lower die base in the vertical direction. The upper end of the separating block extends toward the punch to form an extension arm. The separating block has a first discharge position and a second discharge position during its active stroke. When the separating block is in the first discharge position, the extension arm covers the discharge groove, and the air blowing assembly is used to blow the waste away from the punch. When the separating block is in the second discharge position, the extension arm is located above the punch and forms an infeed gap with the discharge groove. The air blowing assembly is used to blow the finished part from the infeed gap into the discharge groove.

5. The blanking die of claim 4, wherein, The lower end of the separating block is connected to the lower mold base via a second elastic element. The upper mold assembly includes a second pressure rod, which is fixed relative to the upper mold base. The lower end of the second pressure rod protrudes downward from the inner core of the pressure material. The second pressure rod is used to abut the separating block during the mold closing process of the upper mold assembly and the lower mold assembly; and / or, The lower end face of the extension arm is inclined downward in the direction away from the punch.

6. The blanking die of claim 4, wherein, The lower mold mating plate is provided with two first grooves, which are respectively located on opposite sides of the blanking groove in the horizontal direction; The lower mold assembly also includes two limiting blocks, which are respectively disposed in the two first grooves. The lower ends of each limiting block are connected by a third elastic element, so that the limiting block can protrude out of the first groove under elastic force or be retracted into the first groove under pressure.

7. The blanking die of claim 4, wherein, The bottom or side wall of the material discharge chute is provided with a notch for connecting to the outside; An air blowing channel is formed on the lower mold mating plate. The air outlet of the air blowing channel is connected to the material drop groove and is positioned towards the notch. The air inlet of the air blowing channel is used to connect to an external air source.

8. The blanking die of claim 1, wherein, The air blowing assembly includes a mating part, which is disposed on the lower mold base. A first airflow channel is formed in the mating part, and an air blowing hole communicating with the first airflow channel is provided on the side of the mating part facing the cavity mold. The lower mold base has a second airflow channel that connects to the first airflow channel, and the second airflow channel is used to connect to an external air source.

9. The blanking die of claim 8, wherein, The mating component is floatingly mounted to the lower mold base in the vertical direction, so that it can protrude upward from the die cavity under elastic force, or be flush with the die cavity under pressure; and / or, The air blowing holes are spaced out in multiples.

10. The blanking die of claim 8, wherein, The second airflow channel includes a main channel and two branch channels connected to the main channel and arranged in parallel. The main channel is connected to the first airflow channel, and the two branch channels are used to connect to an external air source. The air intake volume of the two branch channels is set differently. The air blowing assembly also includes two limiting rods, which are movably installed to the lower mold base in the vertical direction. The two limiting rods correspond to the two branch channels respectively and can be sealed with the branch channels. The lower ends of the two limiting rods are respectively installed through a fourth elastic element. Both limiting rods are provided with connecting holes, and the heights of the two connecting holes are set differently. After the upper mold assembly and the lower mold assembly are closed, the two limiting rods respectively block the two branch channels; During the separating process of the upper die assembly and the lower die assembly, the two limiting rods are upwardly pushed by elastic force, so that the two communication holes are sequentially moved to be communicated with the corresponding branch runners, so that the second airflow channel is conducted.

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

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