Progressive impact hydraulic forming die capable of being mounted on fixed-stroke punching machine

Abstract

The invention provides a progressive impact hydraulic forming die capable of being installed on a fixed-stroke punching machine, and belongs to the technical field of hydraulic expansion dies, the progressive impact hydraulic forming die comprises a pressurizing part, the pressurizing part comprises a pressurizing supporting part with an open upper end, a pressurizing and material supplementing integrated punch and a pipeline component, the lower end of the pressurizing and material supplementing integrated punch extends into the opening of the pressurizing supporting part in a sliding mode. The progressive impact hydraulic forming die has the beneficial effects that by means of the progressive impact hydraulic forming die capable of being installed on a fixed-stroke punching machine, the pressurizing part slides in the pressurizing supporting part through the pressurizing and material supplementing integrated punch to form the sealed cavity, and hydraulic transmission is achieved through the pipeline component; according to the reciprocating progressive conversion part, an upper pressing plate is connected with the pressurizing supporting part, a rotatable lower pressing block is matched with a ratchet-plate-shaped progressive limiting plate, and the limiting effect of a non-return piece is combined, so that the pressurizing and material supplementing integrated punch extrudes a cavity of the pressurizing supporting part in a progressive mode to increase hydraulic pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic bulging dies, and particularly to a progressive impact hydraulic forming die that can be installed on a fixed-stroke punching press. Background Art

[0002] In the field of modern manufacturing, as an advanced processing technology, hydroforming technology has been widely used. Among them, T-shaped tube hydraulic bulging technology occupies an important position in tube processing. However, this technology has obvious defects, mainly reflected in its dependence on high-pressure sources. Traditional T-shaped tube hydraulic bulging equipment often needs to be equipped with an expensive high-pressure source system, which not only results in high equipment costs but also limits the forming speed and is difficult to meet the requirements of high-efficiency production.

[0003] Impact hydraulic forming technology emerged as an improved solution. Its characteristic of not requiring an external high-pressure source reduces the equipment complexity to a certain extent. However, the impact hydraulic forming technology is limited by the single impact stroke, and the liquid extrusion amount is limited, which restricts its application range in the manufacturing of complex structural parts to a certain extent. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a progressive impact hydraulic forming die that can be installed on a fixed-stroke punching press to solve the technical problem of the high cost of traditional hydraulic bulging technology that relies on high-pressure source equipment.

[0005] An embodiment of the present invention provides a progressive impact hydraulic forming die that can be installed on a fixed-stroke punching press, including: a pressurization part, the pressurization part includes a pressurization support part with an open upper end, a pressurization and feeding integrated punch, and a pipeline component. The lower end of the pressurization and feeding integrated punch slides and extends into the open of the pressurization support part, so that the open upper end of the pressurization support part is sealed to form a cavity for accommodating liquid, and the pipeline component communicates with this cavity; a reciprocating progressive conversion part, which is arranged on the upper part of the pressurization part. The reciprocating progressive conversion part includes an upper pressure plate, a progressive limit plate, a lower pressing block, and a check member. The upper pressure plate is connected to the pressurization support part through an elastic member and can slide vertically. The lower pressing block is rotatably arranged on the upper pressure plate. The progressive limit plate is a ratchet plate facing upward, and it is arranged on the inner and outer side walls of the pressurization and feeding integrated punch. The movable end of the lower pressing block is connected with an elastic member, so that the lower pressing block is pulled by the restoring force of the elastic member and abuts against the tooth surface of the progressive limit plate. The check member abuts against the progressive limit plate. By the lower pressing block pressing the pressurization and feeding integrated punch unidirectionally along with the upper pressure plate, and restricting the pressurization and feeding integrated punch from moving upward and resetting along with the upper pressure plate through the check member, the pressurization and feeding integrated punch squeezes the cavity of the pressurization support part in a progressive manner to increase the hydraulic pressure; a two-way feeding and forming part, which is arranged at the bottom of the pressurization part. The two-way feeding and forming part includes a guide groove bottom plate, two feeding punches, and a feeding wedge block. The feeding wedge block is connected to an extended part of the outer wall of the pressurization and feeding integrated punch. The feeding punches are slidably arranged on the surface of the guide groove bottom plate and communicate with the pipeline component. The feeding wedge block abuts against the feeding punches, and the abutting surface between the feeding wedge block and the feeding punches is an inclined surface. The feeding wedge block gradually presses down along with the pressurization and feeding integrated punch, so that the two feeding punches approach each other to complete feeding.

[0006] Further, the reciprocating progressive conversion part further includes a plurality of guide posts and guide sleeves. The plurality of guide posts are evenly distributed around the top of the pressurization support part. The guide sleeves are arranged on the upper pressure plate, and each guide sleeve is slidably connected to a guide post. The elastic member is connected between the upper pressure plate and the pressurization support part.

[0007] Further, a reciprocating motion block with an open lower end is arranged at the bottom of the upper pressure plate. One end of the lower pressing block is rotatably connected through a lower pressing block pin in the open of the lower pressing block. One end of the elastic member is connected to the end of the reciprocating motion block far from the lower pressing block pin, and the other end is connected to the reciprocating motion block.

[0008] Further, the check member includes a torsion spring pin, a torsion spring, and a check block. The torsion spring pin is disposed on the upper surface of the supercharging support portion through a mounting seat. The check block is rotatably disposed on the torsion spring pin through the torsion spring, and the end of the check block is hooked and engaged with the progressive limit plate on the outer wall of the supercharging and feeding integrated punch.

[0009] Further, shaft retaining rings are disposed at the ends of the lower pressure block pin and the torsion spring pin to limit the axial displacement of the lower pressure block and the check block, thereby improving the abutting stability of the reciprocating block, the check block, and the progressive limit plate.

[0010] Further, the pipeline member includes two high-pressure pipes and a three-way joint. The two ends of the three-way joint are interconnected with the two high-pressure pipes, and the other end is interconnected with the internal cavity of the supercharging support portion. The two high-pressure pipes are respectively interconnected with the two feeding punches, and are used to send the high-pressure liquid in the supercharging support portion into the formed pipe fitting through the feeding punches.

[0011] Further, the two-way feeding and forming portion further includes an elastic member. A head penetrating through the guide groove bottom plate is disposed at the bottom end of each feeding punch. The elastic member is connected between the two heads. The elastic member is used to tension the two feeding punches, so that the two feeding punches approach each other to connect the two ends of the formed pipe fitting and form an initial seal.

[0012] Further, extension segments protrude from the opposite side surfaces of the two feeding punches, and an O-ring is disposed outside the extension segments to improve the sealing effect of the feeding punches relative to the formed pipe fitting.

[0013] Further, a Y-ring is disposed outside the lower end of the supercharging and feeding integrated punch, and the Y-ring is closely attached to the open inner cavity wall of the supercharging support portion and slides thereon.

[0014] Further, side stoppers are disposed on both side walls of the supercharging support portion. The two feeding wedges are respectively slidably connected to the two side stoppers to ensure the vertical downward accuracy of the feeding wedges.

[0015] The beneficial effects brought by the technical solution provided by the embodiments of the present invention are as follows: Through the progressive impact hydraulic forming die that can be installed on a fixed-stroke punching press, the pressurizing part forms a sealed cavity by the sliding of the pressurizing and feeding integrated punch in the pressurizing support part, and realizes hydraulic transmission by means of pipeline components. The reciprocating progressive conversion part utilizes the connection between the upper pressure plate and the pressurizing support part and the cooperation of the rotatable lower pressing block and the ratchet plate-shaped progressive limit plate, combined with the limiting effect of the check part, so that the pressurizing and feeding integrated punch gradually compresses to increase the hydraulic pressure in the cavity of the pressurizing support part. The feeding wedge block and the feeding punch of the two-way feeding forming part are abutted through an inclined surface, and when the pressurizing and feeding integrated punch gradually presses down, it pushes the feeding punches to approach each other to complete feeding. This structural design enables the die to efficiently and accurately complete the hydraulic forming of pipe fittings on a fixed-stroke punching press, without complex hydraulic and control systems, reducing production costs, improving forming efficiency and quality. At the same time, the cooperation of components such as springs and sealing rings between various parts ensures good sealing performance and stability, further enhancing the performance and service life of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the progressive impact hydraulic forming die of the present invention that can be installed on a fixed-stroke punching press;

[0017] Figure 2 is a cross-sectional view of the progressive impact hydraulic forming die of the present invention that can be installed on a fixed-stroke punching press;

[0018] Figure 3 is a schematic structural diagram of the guide groove bottom plate of the progressive impact hydraulic forming die of the present invention that can be installed on a fixed-stroke punching press;

[0019] Figure 4 is a schematic structural diagram of the feeding punch of the progressive impact hydraulic forming die of the present invention that can be installed on a fixed-stroke punching press;

[0020] Figure 5 is a diagram of the implementation movement process of the progressive impact hydraulic forming die of the present invention that can be installed on a fixed-stroke punching press.

[0021] In the figure: 1. Feeding punch; 2. Guide groove bottom plate; 3. Angle iron; 4. Side stop block; 5. Feeding wedge block; 6. Pressurizing support part; 7. Pressurizing and feeding integrated punch; 8. Rectangular spring; 9. Pressure plate; 10. Guide sleeve; 11. Guide post; 12. Check block; 13. Torsion spring; 14. Shaft retaining ring; 15. Torsion spring pin; 16. High-pressure pipe; 17. Three-way joint; 18. Rear half die; 19. Formed pipe fitting; 20. Front half die; 21. Y-shaped sealing ring; 22. Lower pressing block; 23. Lower pressing block pin; 24. Tension spring; 25. Progressive limit plate; 26. Reciprocating motion block; 27. Traction spring; 28. O-shaped sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings. The following describes a preferred one among multiple possible embodiments of the present invention, aiming to provide a basic understanding of the present invention, but not aiming to identify the key or decisive elements of the present invention or limit the scope to be protected.

[0023] In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0024] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification.

[0025] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0026] It should be noted that, unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Please refer to Figures 1 to 4 , the embodiment of the present invention provides a progressive impact hydraulic forming die that can be installed on a fixed-stroke punching press, including a pressurization part, a reciprocating progressive conversion part, and a two-way feeding forming part.

[0028] In this embodiment, the pressurization part includes a pressurization support part 6 with an open upper end, a pressurization and feeding integrated punch 7, and a pipeline component. The lower end of the pressurization and feeding integrated punch 7 slides and extends into the open mouth of the pressurization support part 6, so that the open mouth at the upper end of the pressurization support part 6 is sealed to form a cavity for containing liquid. The pipeline component communicates with this cavity. When the pressurization and feeding integrated punch 7 moves downward, it compresses the cavity, increasing the hydraulic pressure.

[0029] Among them, the pipeline components include two high-pressure pipes 16 and a three-way joint 17. The two ends of the three-way joint 17 are interconnected with the two high-pressure pipes 16, and the other end is interconnected with the internal cavity of the pressurizing support part 6. The two high-pressure pipes 16 are respectively interconnected with the two feeding punches 1, and are used to send the high-pressure liquid in the pressurizing support part 6 into the formed pipe fitting 19 from the feeding punch 1.

[0030] It should be additionally noted that there is a Y-shaped sealing ring 21 outside the lower end of the integrated pressurizing and feeding punch 7, which closely fits and slides along the inner cavity wall of the pressurizing support part 6 to prevent hydraulic leakage. There are side stoppers 4 on both sides of the pressurizing support part 6 to limit the movement track of the feeding wedge block 5 and ensure its vertical downward accuracy.

[0031] In this embodiment, the reciprocating progressive conversion part is arranged on the upper part of the pressurizing part, and includes an upper pressure plate 9, a progressive limit plate 25, a lower pressure block 22 and a check member. The upper pressure plate 9 is connected to the pressurizing support part 6 through a rectangular spring 8 and can slide vertically. The lower pressure block 22 is rotatably arranged on the upper pressure plate 9, and its movable end is connected to a tension spring 24, and abuts against the tooth surface of the progressive limit plate 25 under the restoring force of the tension spring 24. The check member abuts against the progressive limit plate 25 to limit the integrated pressurizing and feeding punch 7 from moving upward and resetting with the upper pressure plate 9, so as to realize progressive pressurization.

[0032] It should be additionally noted that the check member includes a torsion spring pin 15, a torsion spring 13 and a check block 12. The torsion spring pin 15 is arranged on the upper surface of the pressurizing support part 6 through a mounting seat. The check block 12 is rotatably arranged on the torsion spring pin 15 through the torsion spring 13, and its end is hooked and engaged with the progressive limit plate 25 on the outer wall of the integrated pressurizing and feeding punch 7. There are shaft retaining rings 14 at the ends of the lower pressure block pin 23 and the torsion spring pin 15 to limit the axial offset of the lower pressure block 22 and the check block 12 and improve the abutting stability.

[0033] It can be understood that the progressive limit plate 25 is a ratchet plate facing upward, which is arranged on the inner and outer side walls of the integrated pressurizing and feeding punch 7. The check member abuts against the progressive limit plate 25. By pressing the integrated pressurizing and feeding punch 7 downward unidirectionally with the upper pressure plate 9 through the lower pressure block 22, and restricting the integrated pressurizing and feeding punch 7 from moving upward and resetting with the upper pressure plate 9 through the check member, the integrated pressurizing and feeding punch 7 squeezes the cavity of the pressurizing support part 6 in a progressive manner to increase the hydraulic pressure.

[0034] Please refer to Figure 5 , Figure 5 In the left part of part a in [], the left side of the device is a sectional view of the initial position. Liquid is injected into the cavity between the pressurizing support component 6 and the integrated pressurizing and feeding punch 7 from the liquid inlet on the left side. Figure 5 In the right part of part a in [], the right side is the process of the upper pressure plate 9 moving downward under the impact of the fixed stroke of the punching machine; Figure 5 In part b in [], it is the rebound state of the device after completing one cycle; Figure 5The middle part c is the state of the device after completing n cycles. At this time, the pressurizing and feeding integrated punch 7 is squeezed into the pressurizing support member 6 to provide sufficient hydraulic pressure for bulging.

[0035] The reciprocating progressive conversion part further includes a plurality of guide columns 11 and guide sleeves 10. The plurality of guide columns 11 are evenly distributed on the outer periphery of the top of the pressurizing support part 6. The guide sleeves 10 are arranged on the upper pressure plate 9, and each guide sleeve 10 is slidably connected to a guide column 11. The rectangular spring 8 is connected between the upper pressure plate 9 and the pressurizing support part 6.

[0036] A reciprocating motion block 26 with an open lower end is arranged at the bottom of the upper pressure plate 9. One end of the lower pressure block 22 is rotatably connected through a lower pressure block pin 23 inside the open end of the reciprocating motion block 26. One end of the tension spring 24 is connected to the end of the lower pressure block 22 far from the lower pressure block pin 23, and the other end is connected to the reciprocating motion block 26.

[0037] In this embodiment, the two-way feeding forming part is arranged at the bottom of the pressurizing part, and includes a guide groove bottom plate 2, two feeding punches 1 and a feeding wedge block 5. The feeding wedge block 5 is connected to the extended part of the outer wall of the pressurizing and feeding integrated punch 7. The feeding punches 1 are slidably arranged on the surface of the guide groove bottom plate 2 and are in communication with the pipeline components. The feeding wedge block 5 abuts against the feeding punches 1, and the abutting surface of the feeding wedge block 5 and the feeding punches 1 is an inclined surface. The feeding wedge block 5 moves down with the pressurizing and feeding integrated punch 7 to push the two feeding punches 1 closer to each other to complete feeding.

[0038] The vertical downward movement of the pressurizing and feeding integrated punch 7 is transmitted to the feeding punches 1 through the feeding wedge block 5, realizing the pressurizing and feeding actions of the main driving component with a single moving component; at the same time, through the inclined surface structure arranged between the feeding punches 1 and the feeding wedge block 5, the vertical downward movement is changed into the opposite movement of the feeding punches 1 at both ends of the formed pipe fitting 19 to complete the feeding at the pipe ends.

[0039] The guide groove bottom plate 2 and the pressurizing support member 6 are fixedly connected by an angle iron 3. The two-way feeding forming part further includes a rear half die 18 and a front half die 20 that slide on the guide groove bottom plate 2. The rear half die 18 and the front half die 20 are mold moving components that can be engaged. Guide grooves for the rear half die 18 and the front half die 20 to slide are opened on the surface of the guide groove bottom plate 2 to prevent their trajectories from deviating easily during the movement; in addition, a convex feature at the mold closing position is also arranged on the guide groove bottom plate 2 to ensure the coincidence degree of the mold closing surface and the axis of the feeding punch 1.

[0040] To initially seal the connection between the forming pipe fitting 19 and the feeding punch 1, the two-way feeding and forming part further includes a traction spring 27. The bottom end of each feeding punch 1 has an end passing through the guide groove bottom plate 2, and the traction spring 27 connects the ends of the two to tighten the feeding punches 1 and make them approach each other to form an initial seal. The opposite sides of the feeding punches 1 have extension segments, and an O-ring seal 28 is provided outside to improve the sealing effect.

[0041] The working principle of the above embodiment is as follows:

[0042] Before the stamping process of the fixed-stroke punch press, move the front half die 20 outward, place the forming pipe fitting 19 into the mold cavity of the rear half die 18. Due to the action of the traction spring 27, the initial distance between the two feeding punches 1 at both ends is less than the pipe length of the forming pipe fitting 19. Therefore, it is necessary to move the two feeding punches 1 at both ends outward to contact the pipe ends, and an initial seal without liquid leakage is formed under the sealing action of the O-ring seal; and there is no need to deliberately adjust the distance between the two feeding punches 1 at both ends and the feeding wedge block 5, because when the feeding wedge block 5 presses down to feed the material, the two feeding punches 1 at both ends will automatically align, so that the feeding amount at both ends of the forming pipe fitting 19 is the same. Then move the front half die 20 inward to close the mold with the rear half die 18, and fasten and connect them with bolts; inject liquid into the sealed space formed by the pressurizing support component 6 and the pressurizing and feeding integrated punch 7, so that the cavity, the high-pressure pipe 16, the inner hole of the feeding punch 1, and the inside of the forming pipe fitting 19 are filled with liquid;

[0043] During the downward stamping process of the fixed-stroke punch press, the upper pressure plate 9 moves downward under the drive of the punch press, overcoming the elastic force of the rectangular spring 8, the reaction force of squeezing the liquid, and the material deformation resistance of the two-way feeding. The downward pressure block 22 located on the upper pressure plate 9 moves downward against the progressive limit plate 25 through the reciprocating block 26, so that the pressurizing and feeding integrated punch 7 also moves downward. While squeezing the liquid in the sealed space, the feeding wedge block 5 moves downward with the pressurizing and feeding integrated punch 7, and axially feeds the two feeding punches 1 at both ends of the forming pipe fitting 19 by the inclined surface at its lower end; when the inclined surfaces of the feeding wedge block 5 and the feeding punch 1 do not contact each other, the squeezed liquid exceeds the sealing limit of the O-ring seal 28 and will leak from the pipe end until the inclined surfaces of the feeding wedge block 5 and the feeding punch 1 contact each other to further enhance the sealing effect;

[0044] During the upward stamping process of the fixed-stroke punching machine, the rectangular spring 8 releases the compressed elastic force, causing the upper pressure plate 9 to move upward. The lower pressing block 22 also moves upward along with the upper pressure plate 9. Since the tooth surface direction of the progressive limit plate 25 is the same as the moving direction of the lower pressing block 22, the lower pressing block 22 will not drive the integrated boosting and feeding punch 7 to move upward. At this time, the check block 12 abuts against the progressive limit plate 25 through its hook-shaped part, restricting the upward movement of the integrated boosting and feeding punch 7 and maintaining the pressure value and the feeding position. This process is repeated. After the forming is completed, the pressure is first relieved, and then the tension spring 24 and the torsion spring 13 are adjusted to appropriate positions to reset the moving parts of the mold, and the mold is opened to take out the workpiece.

[0045] In this article, the front, rear, upper, lower and other directional terms are defined based on the positions of the components in the drawings and the positions of the components relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different usage and placement methods. The use of these directional terms should not limit the scope of protection claimed in this application.

[0046] Without conflict, the above-mentioned embodiments and the features in the embodiments in this article can be combined with each other.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A progressive impact hydraulic forming die that can be mounted on a fixed stroke punch press, characterized in that: include: A pressurizing part, the pressurizing part comprising a pressurizing support part (6) with an open upper end, a pressurizing material-replenishing integrated punch (7), and a pipe component, the lower end of the pressurizing material-replenishing integrated punch (7) slidingly extends into the open end of the pressurizing support part (6), so that the upper open end of the pressurizing support part (6) is sealed to form a cavity for accommodating liquid, and the pipe component is in communication with the cavity; A reciprocating progressive conversion part is arranged on the upper part of the boosting part, and the reciprocating progressive conversion part includes an upper pressure plate (9), a progressive limit plate (25), a lower pressure block (22) and a check member. The upper pressure plate (9) is connected to the boosting support part (6) through an elastic member and can slide vertically. The lower pressure block (22) is rotatably arranged on the upper pressure plate (9). The progressive limit plate (25) is a ratchet plate facing the upper end, which is arranged on the inner and outer side walls of the boosting and feeding integrated punch (7). The movable end of the lower pressure block (22) An elastic member is connected, so that the lower pressing block (22) is pulled by the restoring force of the elastic member to abut against the tooth surface of the progressive limit plate (25), and the non-return member abuts against the progressive limit plate (25), and the pressurized material-replenishing integrated punch (7) is pressed downward unilaterally by the lower pressing block (22) along with the upper pressing plate (9), and the non-return member limits the pressurized material-replenishing integrated punch (7) from moving upward and resetting along with the upper pressing plate (9), so that the pressurized material-replenishing integrated punch (7) squeezes the cavity of the pressurized support part (6) in a progressive manner to increase the hydraulic pressure; A bidirectional material feeding forming section is arranged at the bottom of the boosting section, and comprises a guide groove bottom plate (2), two material feeding punches (1) and a material feeding wedge block (5). The material feeding wedge block (5) is connected to the extended part of the outer wall of the boosting material feeding integrated punch (7). The material feeding punch (1) is slidably arranged on the surface of the guide groove bottom plate (2) and is interconnected with the pipeline component. The material feeding wedge block (5) and the material feeding punch (1) are mutually abutted, and the abutting surface of the material feeding wedge block (5) and the material feeding punch (1) is an inclined surface. The material feeding wedge block (5) is gradually pressed down along with the boosting material feeding integrated punch (7), so that the two material feeding punches (1) are close to each other to complete the material feeding.

2. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press according to claim 1, characterized in that: The reciprocating progressive conversion portion also includes a plurality of guide columns (11) and guide sleeves (10), wherein the plurality of guide columns (11) are evenly distributed on the top periphery of the boost support portion (6), the guide sleeves (10) are arranged on the upper pressure plate (9), and each guide sleeve (10) is slidably connected to a guide column (11), and an elastic member is connected between the upper pressure plate (9) and the boost support portion (6).

3. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 1, characterized in that: A reciprocating block (26) with an open lower end is provided at the bottom of the upper pressure plate (9); one end of the lower pressure block (22) is rotatably connected in the opening of the reciprocating block (26) through a lower pressure block latch (23); one end of the elastic member is connected to one end of the lower pressure block (22) away from the lower pressure block latch (23), and the other end is connected to the reciprocating block (26).

4. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 3, characterized in that: The check member includes a torsion spring latch (15), a torsion spring (13) and a check block (12); the torsion spring latch (15) is arranged on the upper surface of the boost support portion (6) via a mounting seat; the check block (12) is rotatably arranged on the torsion spring latch (15) via a torsion spring (13); and the end of the check block (12) is hook-shaped and engages with the progressive limit plate (25) on the outer wall of the boost feeding integrated punch (7).

5. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 4, characterized in that: The ends of the lower pressing block latch (23) and the torsion spring latch (15) are both provided with shaft retaining rings (14) for limiting the axial displacement of the lower pressing block (22) and the check block (12), thereby improving the abutment stability of the lower pressing block (22), the check block (12) and the progressive limit plate (25).

6. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 1, characterized in that: The pipeline component comprises two high-pressure pipes (16) and a three-way joint (17); the two ends of the three-way joint (17) are interconnected with the two high-pressure pipes (16), and the other end thereof is interconnected with the internal cavity of the boost support portion (6); the two high-pressure pipes (16) are respectively interconnected with the two feeding punches (1) for delivering the high-pressure liquid in the boost support portion (6) from the feeding punch (1) into the forming pipe (19).

7. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 1, characterized in that: The bidirectional material feeding and forming part also includes an elastic member, and an end head penetrating through the guide groove bottom plate (2) is arranged at the bottom end of each of the material feeding punches (1), and the elastic member is connected between the two end heads. The elastic member is used to tighten the two material feeding punches (1) so that the two material feeding punches (1) are close to each other at the two ends of the connecting forming pipe (19) and form an initial seal.

8. The progressive impact hydraulic forming die mountable on a fixed stroke punch press as claimed in claim 7, characterized in that: An extension section is protruded on one side surface opposite to the two feeding punches (1), and an O-type sealing ring (28) is arranged outside the extension section to improve the sealing effect of the feeding punch (1) relative to the forming pipe (19).

9. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 1, characterized in that: A Y-shaped sealing ring (21) is arranged on the outside of the lower end of the pressurized material-feeding integrated punch (7), and the Y-shaped sealing ring (21) is tightly fitted to the open inner cavity wall of the pressurized support part (6) for sliding.

10. The progressive impact hydraulic forming die that can be installed on a fixed stroke punch press as claimed in claim 1, characterized in that: Side blocks (4) are provided on both side walls of the boost support portion (6), and the two feeding wedge blocks (5) are respectively slidably connected to the two side blocks (4) to ensure the vertical downward accuracy of the feeding wedge blocks (5).

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