One-step blanking stretch punching continuous die

Abstract

The invention discloses a one-step blanking, stretching and punching continuous die, comprising an upper die, a lower die, a blanking die, a blanking punch, a stretching punch, a punching punch and an upper die elastic part. The upper die can be lifted and lowered and is located directly above the lower die. The blanking die can be slidably installed on the upper die along the longitudinal direction. There is a gap between the stretching punch fixed in the blanking die and the blanking die. The punching punch fixed on the lower die can be slidably arranged in the internal through-hole of the stretching punch along the longitudinal direction. The upper die elastic part provides downward elastic retaining force for the blanking die and the stretching punch. The blanking punch fixed on the lower die has a stretching die inside, and punching die through-holes are formed on the bottom surface of the stretching die. The blanking punch can be inserted between the blanking die and the stretching punch, the stretching punch can be inserted in the stretching die, and the punching punch can be inserted in the through-hole of the punching die. The three steps of blanking, stretching and punching can be realized in one process, which greatly reduces the die cost and improves the production efficiency.

Description

Technical Field

[0001] The invention relates to a hardware mould, in particular to a one-step blanking, stretching and punching continuous mould. Background Art

[0002] Currently in stamping production, the three actions of blanking, stretching and punching are generally completed using three sets of single-action processes, which require three sets of molds. Workers need to take out the products completed in one process and put them into another process for production. This production method leads to low production efficiency and high production costs. In addition, since three processes and three sets of molds are required, the mold cost is high, resulting in high product production costs, high product unit prices, and lack of competitiveness. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a one-step blanking, stretching and punching continuous die, through which the three actions of blanking, stretching and punching can be performed in one process, thereby realizing continuous die production, improving production efficiency and reducing production costs.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a one-step blanking stretching punching continuous die, including an upper die, a lower die, a blanking die, a blanking punch, a stretching punch, a punching punch and an upper die elastic member, the mold closing direction is set to the longitudinal direction, the upper die can be lifted and lowered in the longitudinal direction and positioned directly above the lower die, the blanking die can be slid along the longitudinal direction and installed at the lower side of the upper die at a set distance, the stretching punch is fixedly inserted in the blanking die, and there is a gap between the outer circumferential wall of the stretching punch and the inner circumferential wall of the blanking die that matches the length of the bending edge of the product, and the punching punch is fixedly installed On the upper die, the punching punch can be inserted into the internal through-hole of the stretching punch so as to slide relatively longitudinally. The elastic part of the upper die provides an elastic retaining force downward in the longitudinal direction to the blanking die and the stretching punch. The blanking punch is fixedly mounted on the upper side surface of the lower die. A stretching die is formed in the blanking punch. A punching die through-hole is formed on the bottom surface of the stretching die. The blanking punch on the lower die can be inserted into the gap between the blanking die of the upper die and the stretching punch. The stretching punch can be inserted into the stretching die of the blanking punch. The punching punch can be inserted into the punching die through-hole on the bottom surface of the stretching die.

[0005] As a further improvement of the present invention, the lower die includes a lower die base, a lower pad and a lower mold plate. The lower die base, the lower pad and the lower mold plate are fixedly stacked in sequence from bottom to top. An inverted T-shaped positioning hole with an upper inner diameter smaller than the lower inner diameter is formed on the lower mold plate. The blanking punch has an inverted T-shaped structure with an upper outer diameter smaller than the lower outer diameter. The blanking punch is tightly inserted into the inverted T-shaped positioning hole of the lower mold plate, and the upper end of the blanking punch is higher than a set height from the upper surface of the lower mold plate. The lower end face of the blanking punch is tightly against the upper surface of the lower pad. The lower pad and the lower die base are provided with a blanking hole connected to the inverted T-shaped positioning hole on the lower mold plate, and the inner diameter of the blanking hole is smaller than the inner diameter of the lower end of the inverted T-shaped positioning hole.

[0006] As a further improvement of the present invention, a floating pad and a lower die elastic member are also provided. The stretching die in the blanking punch is a vertical through-structure. The floating pad can be inserted into the stretching die of the blanking punch by sliding a set distance in the longitudinal direction. The upper surface of the floating pad forms the bottom surface of the stretching die, and the punching die perforation is located on the floating pad. The lower die elastic member provides the floating pad with a longitudinal upward elastic retaining force.

[0007] As a further improvement of the present invention, the stretching die in the blanking punch is an inverted T-shaped perforation structure with an inner diameter of the upper end smaller than that of the lower end, the inner diameter of the blanking hole on the lower pad is smaller than the inner diameter of the lower end of the inverted T-shaped perforation structure, and a circle of annular bosses is formed on the circumferential outer wall of the floating pad. The upper end of the floating pad can be inserted into the inner side of the upper end of the inverted T-shaped perforation structure by sliding along the longitudinal direction, and the lower end of the floating pad can be inserted into the blanking hole of the lower pad by sliding along the longitudinal direction. The annular boss on the floating pad can be inserted into the inner side of the lower end of the aforementioned inverted T-shaped perforation structure by sliding along the longitudinal direction, and the axial ends of the annular boss on the floating pad are respectively stopped at the step surface between the two ends of the inverted T-shaped perforation structure and the upper surface of the lower pad.

[0008] As a further improvement of the present invention, the lower pad is also provided with a push pin through hole which is opposite to the annular boss of the floating pad, and the lower die seat is provided with a spring hole which is opposite to the push pin through hole, the inner diameter of the spring hole is larger than the inner diameter of the push pin through hole, a push pin can be slidably inserted in the push pin through hole, and an outwardly expanded head is formed at the lower end of the push pin to stop the lower side of the lower pad, and the outwardly expanded head can be slidably accommodated in the spring hole of the lower die seat, the lower end of the lower die elastic member is fixedly arranged in the spring hole of the lower die seat, and the upper end of the lower die elastic member is tightly against the lower end surface of the annular boss of the floating pad.

[0009] As a further improvement of the present invention, a stripper block and a stripper elastic member are provided. The stripper block can be slid longitudinally to a set distance and is sleeved on the outside of the blanking punch. The stripper block can be higher than a set height of the blanking punch. The stripper elastic member provides a set elastic force in the longitudinal upward direction to the stripper block.

[0010] As a further improvement of the present invention, a strip stripping bolt is provided. The strip stripping bolt can be inserted into the lower template and the lower pad in a longitudinally slidable manner. The upper end of the strip stripping bolt is fixedly connected to the strip stripping block. The head of the strip stripping bolt is stopped at the lower side of the lower pad. The strip stripping elastic part is inserted in the lower mold base, and the upper end of the strip elastic part is tightly against the head of the strip stripping bolt.

[0011] As a further improvement of the present invention, the upper mold comprises an upper mold plate, an upper pad, an upper stripping plate and an upper mold seat, the upper pad is fixedly installed on the lower side surface of the upper mold seat, the upper stripping plate can be installed on the lower side of the upper pad at a set distance along the longitudinal direction, the upper mold plate is fixedly installed on the lower side surface of the upper stripping plate, the two ends of the elastic part of the upper mold in the elastic expansion direction are respectively fixedly installed on the upper pad and the upper stripping plate, the blanking die is inserted in the upper mold plate and is fixedly connected to the upper stripping plate, the inner upper end of the blanking die forms an inner diameter expansion structure, the upper end of the stretching punch forms an outer diameter expansion step structure, the step structure on the upper end of the stretching punch is just inserted in the inner diameter expansion structure at the inner upper end of the blanking die, and the step structure on the stretching punch is tightly clamped between the step surface formed by the inner diameter expansion structure at the upper end of the blanking die and the lower side surface of the upper stripping plate, the upper end of the punching punch passes through the inner holes of the stretching punch and the upper stripping plate and is finally fixedly connected to the upper pad.

[0012] As a further improvement of the present invention, a sliding block and a sliding elastic member are further provided. The sliding block can slide a set distance in the longitudinal direction and be inserted into the gap between the blanking die and the stretching punch. The lower end of the sliding block can extend outward from the lower end of the blanking die. The sliding block stops at the upper end of the product after stretching, and the sliding elastic member provides the sliding block with a longitudinal downward elastic retaining force.

[0013] As a further improvement of the present invention, the outer diameter of the upper end of the sliding block is larger than the outer diameter of the lower end, and the two ends are connected by an inclined surface. The inner side of the blanking die is a structure in which the inner diameter of the upper end is larger than the inner diameter of the lower end, and the upper end and the lower end of the inner side of the blanking die are connected by an inclined surface. The inclined surface between the two ends of the sliding block fits the outer diameter expansion structure on the inclined surface inside the blanking die, and stops on the connecting surface of the inner diameter expansion structure inside the blanking die. A sliding pin is also provided, and the sliding pin can be slidably inserted in the upper template, the upper stripping plate and the upper pad. A radially outward expansion retaining ring is formed on the upper end of the sliding pin, and the radially outward expansion retaining ring is stopped on the upper side of the upper pad. The sliding elastic part is installed on the upper die seat, and the lower end of the sliding elastic part is tightly against the upper end of the radially outward expansion retaining ring of the sliding pin.

[0014] The beneficial effects of the present invention are as follows: the present invention arranges a blanking die, a stretching punch and a blanking punch in an annular sleeve on the upper die, cooperates with the blanking punch on the lower die, and arranges a stretching die in the blanking punch, and arranges a punching die perforation on the bottom surface of the stretching die. By adopting this ingenious design of annular sleeves, the three steps of blanking, stretching and punching can be realized in one process, avoiding the use of three sets of single-action molds, greatly reducing the mold cost, improving the production efficiency, avoiding the errors caused by repeated positioning, improving the product molding accuracy, saving labor, and eliminating the need for transfer, saving a lot of labor, effectively reducing product costs, and improving the market competitiveness of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the process steps of the product using existing technology;

[0016] Figure 2 It is a schematic diagram of the process steps of the product using the present invention;

[0017] Figure 3 This is the front view of the mold opening state of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0019] Figure 5 This is a front view of the mold closing state of the present invention;

[0020] Figure 6 for Figure 5 Enlarged view of middle part B;

[0021] Figure 7 It is a top view of the present invention. DETAILED DESCRIPTION

[0022] Embodiment: A one-step blanking, stretching and punching continuous die, comprising an upper die, a lower die, a blanking die 1, a blanking punch 2, a stretching punch 3, a punching punch 4 and an upper die elastic member, wherein the mold closing direction is longitudinal, the upper die can be lifted and lowered in the longitudinal direction and positioned directly above the lower die, the blanking die 1 can be slid in the longitudinal direction and installed at the lower side of the upper die at a set distance, the stretching punch 3 is fixedly inserted in the blanking die 1, and there is a gap between the circumferential outer wall of the stretching punch 3 and the circumferential inner wall of the blanking die 1 that matches the length of the bending edge of the product, the punching punch 4 is fixedly installed on the upper die, and the punching punch 4 It can be inserted into the internal through-hole of the stretching punch 3 so as to slide relatively longitudinally. The elastic part of the upper die provides an elastic retaining force downward in the longitudinal direction to the blanking die 1 and the stretching punch 3. The blanking punch 2 is fixedly installed on the upper side surface of the lower die. A stretching die is formed in the blanking punch 2. A punching die through-hole 5 is formed on the bottom surface of the stretching die. The blanking punch 2 on the lower die can be inserted into the gap between the blanking die 1 and the stretching punch 3 of the upper die. The stretching punch 3 can be inserted into the stretching die of the blanking punch 2. The punching punch 4 can be inserted into the punching die through-hole 5 on the bottom surface of the stretching die.

[0023] The material strip 24 is fed toward the inside of the mold by the feeding mechanism, and the upper mold moves downward to close the mold with the lower mold. When closing the mold, the blanking punch 2 on the lower mold is inserted into the blanking die 1 of the upper mold to realize the loading and unloading of the material sheet from the material strip. At the same time, the stretching punch 3 is inserted into the stretching die inside the blanking punch 2. As the mold closing continues, the material sheet just unloaded is stretched by the stretching punch 3 to form a barrel-shaped body, and the elastic part of the upper mold is gradually compressed as the mold is closed. The punching punch 4 extends to the outside of the stretching punch 3 and extends into the punching die perforation 5 on the bottom surface of the stretching die to punch holes on the bottom surface of the product 25. The waste generated by the punching on the bottom surface of the product falls from the punching die perforation 5 and is discharged to the outside of the mold. The mold realizes the three actions of blanking, stretching and punching in one step, avoids the use of three sets of molds, reduces mold costs, improves production efficiency, avoids repeated positioning errors of workpieces, and improves product precision.

[0024] The lower die comprises a lower die base 6, a lower pad 7 and a lower template 8, which are fixedly stacked in sequence from bottom to top. An inverted T-shaped positioning hole with an upper inner diameter smaller than the lower inner diameter is formed on the lower template 8. The blanking punch 2 is in an inverted T-shaped structure with an upper outer diameter smaller than the lower outer diameter. The blanking punch 2 is tightly inserted into the inverted T-shaped positioning hole of the lower template 8, and the upper end of the blanking punch 2 is higher than a set height from the upper surface of the lower template 8. The lower end face of the blanking punch 2 is tightly against the upper surface of the lower pad 7. The lower pad 7 and the lower die base 6 are provided with a blanking hole 9 connected to the inverted T-shaped positioning hole on the lower template 8, and the inner diameter of the blanking hole 9 is smaller than the inner diameter of the lower end of the inverted T-shaped positioning hole. The lower end of the blanking punch 2 is clamped by the lower pad 7 and the lower template 8 to achieve axial fixed positioning. The root of the step between the two ends of the blanking punch 2 is preferably connected by a bevel, and the connection between the two ends of the inverted T-shaped positioning hole of the lower template 8 is also preferably provided with a bevel. Through the contact of the two bevels, the internal stress of the sharp corners can be greatly reduced, thereby preventing the mold from cracking due to impact force during the stamping process.

[0025] A floating pad 10 and a lower die elastic member 11 are also provided. The drawing die in the blanking punch 2 is a vertical through structure. The floating pad 10 can be inserted into the drawing die of the blanking punch 2 by sliding along the longitudinal direction at a set distance. The upper surface of the floating pad 10 forms the bottom surface of the drawing die. The punching die perforation 5 is located on the floating pad 10. The lower die elastic member 11 provides the floating pad 10 with a longitudinal upward elastic retaining force. The floating pad 10 supports the blanking sheet through elastic floating, which is conducive to ensuring the drawing accuracy.

[0026] The drawing die in the blanking punch 2 is an inverted T-shaped perforated structure with an inner diameter of the upper end smaller than that of the lower end. The inner diameter of the blanking hole 9 on the lower pad 7 is smaller than that of the lower end of the inverted T-shaped perforated structure. A circle of annular bosses 12 is formed on the outer circumferential wall of the floating pad 10. The upper end of the floating pad 10 can be inserted into the inner side of the upper end of the inverted T-shaped perforated structure by sliding in the longitudinal direction. The lower end of the floating pad 10 can be inserted into the blanking hole 9 of the lower pad 7 by sliding in the longitudinal direction. The annular boss 12 on the floating pad 10 can be inserted into the inner side of the lower end of the inverted T-shaped perforated structure by sliding in the longitudinal direction. The axial ends of the annular boss 12 on the floating pad 10 are respectively stopped at the step surface between the two ends of the inverted T-shaped perforated structure and the upper surface of the lower pad 7. The up and down movement distance of the floating pad 10 is limited by the annular boss 12 on the floating pad 10 sliding between the step surfaces at both ends of the inner side of the drawing die and the lower pad 7.

[0027] The lower pad 7 is also provided with a through hole for a push pin 13 which is opposite to the annular boss 12 of the floating pad 10, and the lower die seat 6 is provided with a spring hole which is opposite to the through hole for the push pin 13, the inner diameter of the spring hole is larger than the inner diameter of the through hole for the push pin 13, and the push pin 13 can be slidably inserted in the through hole for the push pin 13, and the lower end of the push pin 13 is formed with an outwardly expanded head which stops at the lower side of the lower pad 7, and the outwardly expanded head can be slidably accommodated in the spring hole of the lower die seat 6, the lower end of the lower die elastic member 11 is fixedly provided in the spring hole of the lower die seat 6, and the upper end of the lower die elastic member 11 is tightly against the lower end surface of the annular boss 12 of the floating pad 10.

[0028] A strip stripping block 14 and a strip stripping elastic member 15 are also provided. The strip stripping block 14 can be slid longitudinally to a set distance and sleeved on the outside of the blanking punch 2. The strip stripping block 14 can be higher than the blanking punch 2 by a set height. The strip stripping elastic member 15 provides a set elastic force in the longitudinal upward direction to the strip stripping block 14. The strip stripping block 14 is used to support the strip after blanking, so as to prevent the rubber strip from being stuck on the blanking punch 2, and realize automatic stripping of the strip after blanking.

[0029] A stripping bolt 16 is also provided, which can be inserted into the lower mold plate 8 and the lower pad 8 in a longitudinally slidable manner, the upper end of which is fixedly connected to the stripping block 14, the head of which is stopped at the lower side of the lower pad 8, the stripping elastic member 15 is inserted into the lower mold base 6, and the upper end of which is tightly against the head of the stripping bolt 16. The stripping bolt 16 can realize the positioning of the strip supporting block and the limitation of the sliding distance.

[0030] The upper mold comprises an upper mold plate 17, an upper pad 18, an upper stripping plate 19 and an upper mold base 20, wherein the upper pad 18 is fixedly mounted on the lower side of the upper mold base 20, and the upper stripping plate 19 can be mounted on the lower side of the upper pad 18 by sliding a set distance in the longitudinal direction, the upper mold plate 17 is fixedly mounted on the lower side of the upper stripping plate 19, and the two ends of the elastic part of the upper mold in the elastic expansion direction are respectively fixedly mounted on the upper pad 18 and the upper stripping plate 19, and the blanking die 1 is inserted in the upper mold plate 17 and fixedly connected to the upper stripping plate 19 , the inner upper end of the blanking die 1 forms an inner diameter expansion structure, and the upper end of the stretching punch 3 forms a step structure with an outer diameter expansion. The step structure at the upper end of the stretching punch 3 is just inserted into the inner diameter expansion structure at the inner upper end of the blanking die 1, and the step structure on the stretching punch 3 is tightly clamped between the step surface formed by the inner diameter expansion structure at the upper end of the blanking die 1 and the lower surface of the upper stripping plate 19. The upper end of the punching punch 4 passes through the inner holes of the stretching punch 3 and the upper stripping plate 19 and is finally fixedly connected to the upper pad 18. The blanking die 1 and the stretching punch 3 are both fixedly positioned with the upper stripping plate 19, and the two move synchronously. The upper die elastic member realizes elastic force on the blanking die 1 and the stretching punch 3 synchronously through the upper stripping plate 19, and the two realize blanking and stretching under the action of the elastic force.

[0031] A sliding block 21 and a sliding elastic member 22 are also provided. The sliding block 21 can slide a set distance in the longitudinal direction and be inserted into the gap between the blanking die 1 and the stretching punch 3. The lower end of the sliding block 21 can extend outward from the lower end of the blanking die 1. The sliding block 21 stops at the upper end of the stretched product. The sliding elastic member 22 provides the sliding block 21 with a longitudinal downward elastic retaining force.

[0032] When the mold is closed and the material is being cut, the sliding block 21 is kept tightly against the upper surface of the material strip to press the material and ensure the cutting accuracy. After the product is formed, when the mold is opened, the sliding block 21 can tightly against the product between the blanking die 1 and the stretching punch 3 to achieve product stripping and avoid the product being stuck between the blanking die 1 and the stretching punch 3, thereby achieving smooth product stripping.

[0033] The outer diameter of the upper end of the sliding block 21 is larger than the outer diameter of the lower end, and the two ends are connected by an inclined surface. The inner side of the blanking die 1 is a structure in which the inner diameter of the upper end is larger than the inner diameter of the lower end, and the upper end and the lower end of the inner side of the blanking die 1 are connected by an inclined surface. The inclined surface between the two ends of the sliding block 21 fits the outer diameter expansion structure on the inclined surface inside the blanking die 1 and stops on the connecting surface of the inner diameter expansion structure inside the blanking die 1. A sliding pin 23 is also provided. The sliding pin 23 can be slidably inserted in the upper template 17, the upper stripping plate 19 and the upper pad 18. A radially outward expansion retaining ring is formed on the upper end of the sliding pin 23, and the radially outward expansion retaining ring is stopped on the upper side of the upper pad 18. The sliding elastic member 22 is installed on the upper die seat 20, and the lower end of the sliding elastic member 22 is tightly against the upper end of the radially outward expansion retaining ring of the sliding pin 23.

Claims

1. A one-step blanking, stretching and punching continuous die, characterized in that: The present invention comprises an upper die, a lower die, a blanking die (1), a blanking punch (2), a stretching punch (3), a punching punch (4) and an upper die elastic member, wherein the mold closing direction is longitudinal, the upper die can be lifted and lowered in the longitudinal direction and positioned directly above the lower die, the blanking die can be slid in the longitudinal direction and installed at a set distance on the lower side of the upper die, the stretching punch is fixedly inserted in the blanking die, and a gap matching the length of the bending edge of the product exists between the circumferential outer wall of the stretching punch and the circumferential inner wall of the blanking die, the punching punch is fixedly installed on the upper die, and the punching punch can be relatively slid in the longitudinal direction and inserted into the internal perforation of the stretching punch. The upper die elastic member provides a longitudinal downward elastic retaining force to the blanking die and the stretching punch. The blanking punch is fixedly mounted on the upper side of the lower die. A stretching die is formed in the blanking punch. A punching die through-hole (5) is formed on the bottom surface of the stretching die. The blanking punch on the lower die can be inserted into the gap between the blanking die and the stretching punch of the upper die. The stretching punch can be inserted into the stretching die of the blanking punch. The punching punch can be inserted into the punching die through-hole on the bottom surface of the stretching die. A floating pad (10) and a lower die elastic member (11) are also provided. The stretching die in the blanking punch is a through-hole formed in the upper and lower surfaces. The floating pad can slide longitudinally to a set distance and be inserted into the drawing die of the blanking punch. The upper surface of the floating pad forms the bottom surface of the drawing die. The punching die perforation is located on the floating pad. The lower die elastic member provides the floating pad with a longitudinal upward elastic retaining force. The material strip is fed toward the inside of the mold by the feeding mechanism. The upper mold moves downward and closes the mold with the lower mold. When closing the mold, the blanking punch on the lower mold is inserted into the blanking die of the upper mold to realize the loading and unloading of the material sheet from the material strip. At the same time, the drawing punch is inserted into the drawing die in the blanking punch. As the mold closing continues, the material sheet just discharged is pulled by the drawing punch. The product is stretched to form a barrel-shaped body, and the elastic part of the upper mold is gradually compressed as the mold is closed. The punching punch extends to the outside of the stretching punch and extends into the punching die hole on the bottom surface of the stretching die, punching a hole on the bottom surface of the product. The waste generated by the punching on the bottom surface of the product falls from the punching die hole and is discharged to the outside of the mold. A strip stripping block (14) and a strip stripping elastic part (15) are also provided. The strip stripping block can be slid along the longitudinal direction for a set distance and is sleeved on the outside of the blanking punch. The strip stripping block can be higher than the set height of the blanking punch. The strip stripping elastic part provides the strip stripping block with a set elastic force in the longitudinal direction upward.

2. The one-step blanking, stretching and punching continuous die according to claim 1, characterized in that: The lower die comprises a lower die base (6), a lower pad (7) and a lower template (8). The lower die base, the lower pad and the lower template are fixedly stacked in sequence from bottom to top. An inverted T-shaped positioning hole with an upper inner diameter smaller than a lower inner diameter is formed on the lower template. The blanking punch is in an inverted T-shaped structure with an upper outer diameter smaller than a lower outer diameter. The blanking punch is tightly inserted into the inverted T-shaped positioning hole of the lower template, and the upper end of the blanking punch is higher than a set height of the upper side surface of the lower template. The lower end surface of the blanking punch is tightly against the upper side surface of the lower pad. The lower pad and the lower die base are provided with a blanking hole (9) connected to the inverted T-shaped positioning hole on the lower template. The inner diameter of the blanking hole is smaller than the inner diameter of the lower end of the inverted T-shaped positioning hole.

3. The one-step blanking, stretching and punching continuous die according to claim 2, characterized in that: The drawing die in the blanking punch is an inverted T-shaped perforated structure with an inner diameter of the upper end smaller than that of the lower end, the inner diameter of the blanking hole on the lower pad is smaller than the inner diameter of the lower end of the inverted T-shaped perforated structure, a circle of annular bosses (12) are formed on the circumferential outer wall of the floating pad, the upper end of the floating pad can be inserted into the inner side of the upper end of the inverted T-shaped perforated structure by sliding along the longitudinal direction, the lower end of the floating pad can be inserted into the blanking hole of the lower pad by sliding along the longitudinal direction, the annular boss on the floating pad can be inserted into the inner side of the lower end of the aforementioned inverted T-shaped perforated structure by sliding along the longitudinal direction, and the axial ends of the annular boss on the floating pad are respectively stopped at the step surface between the two ends of the inverted T-shaped perforated structure and the upper surface of the lower pad.

4. The one-step blanking, stretching and punching continuous die according to claim 3, characterized in that: The lower pad is also provided with a pin through hole directly opposite to the annular boss of the floating pad, and the lower die seat is provided with a spring hole directly opposite to the pin through hole, the inner diameter of the spring hole is larger than the inner diameter of the pin through hole, a pin (13) can be slidably inserted in the pin through hole, the lower end of the pin is formed with an outwardly expanded head which stops at the lower side of the lower pad, and the outwardly expanded head can be slidably accommodated in the spring hole of the lower die seat, the lower end of the lower die elastic member is fixedly arranged in the spring hole of the lower die seat, and the upper end of the lower die elastic member is tightly against the lower end surface of the annular boss of the floating pad.

5. The one-step blanking, stretching and punching continuous die according to claim 1, characterized in that: A stripping bolt (16) is also provided, which can be inserted into the lower mold plate and the lower pad in a longitudinally slidable manner, the upper end of the stripping bolt is fixedly connected to the stripping block, the head of the stripping bolt is stopped at the lower side of the lower pad, the stripping elastic member is inserted into the lower mold base, and the upper end of the stripping elastic member is tightly against the head of the stripping bolt.

6. The one-step blanking, stretching and punching continuous die according to claim 1, characterized in that: The upper die comprises an upper die plate (17), an upper pad (18), an upper stripping plate (19) and an upper die seat (20), wherein the upper pad is fixedly mounted on the lower side surface of the upper die seat, and the upper stripping plate can be mounted on the lower side of the upper pad by sliding along the longitudinal direction at a set distance, the upper die plate is fixedly mounted on the lower side surface of the upper stripping plate, and the two ends of the elastic part of the upper die in the elastic expansion direction are respectively fixedly mounted on the upper pad and the upper stripping plate, the blanking die is inserted in the upper die plate and is fixedly connected to the upper stripping plate, an inner diameter expansion structure is formed at the upper end of the inner side of the blanking die, and an outer diameter expansion step structure is formed at the upper end of the stretching punch, the step structure at the upper end of the stretching punch is just inserted in the inner diameter expansion structure at the upper end of the inner side of the blanking die, and the step structure on the stretching punch is tightly clamped between the step surface formed by the inner diameter expansion structure at the upper end of the blanking die and the lower side surface of the upper stripping plate, and the upper end of the punching punch passes through the inner holes of the stretching punch and the upper stripping plate and is finally fixedly connected to the upper pad.

7. The one-step blanking, stretching and punching continuous die according to claim 6, characterized in that: A sliding block (21) and a sliding elastic member (22) are also provided. The sliding block can slide a set distance in the longitudinal direction and be inserted into the gap between the blanking die and the stretching punch. The lower end of the sliding block can extend out of the lower end of the blanking die. The sliding block stops at the upper end of the stretched product. The sliding elastic member provides the sliding block with a longitudinal downward elastic retaining force.

8. The one-step blanking, stretching and punching continuous die according to claim 7, characterized in that: The outer diameter of the upper end of the sliding block is larger than the outer diameter of the lower end, and the two ends are connected by an inclined surface. The inner side of the blanking die is a structure in which the inner diameter of the upper end is larger than the inner diameter of the lower end, and the upper end and the lower end of the inner side of the blanking die are connected by an inclined surface. The inclined surface between the two ends of the sliding block fits the outer diameter expansion structure on the inclined surface inside the blanking die, and stops on the connecting surface of the inner diameter expansion structure inside the blanking die. A sliding pin (23) is also provided. The sliding pin can be slidably inserted in the upper mold plate, the upper stripping plate and the upper pad. The upper end of the sliding pin forms a radially outward expansion retaining ring, which stops on the upper side of the upper pad. The sliding elastic member is installed on the upper mold base, and the lower end of the sliding elastic member is tightly against the upper end of the radially outward expansion retaining ring of the sliding pin.

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