Mold for manufacturing elbow pipe

Abstract

The present disclosure relates to the technical field of stamping die, and provides a bend pipe preparation die, which comprises an upper die, a lower die, a flanging fixed part, a flanging movable part and a supporting part; the upper die comprises a stamping rubber bag; the flanging fixed part is fixed in the lower die and has a guide part; the flanging movable part is movably arranged in the guide part and can slide downward along the guide part; the supporting part is arranged on the lower die in a lifting manner and one end of the supporting part is abutted against and supported below the flanging movable part; the stamping rubber bag can extrude a to-be-stamped blank under the action of liquid filling and pressurization; the flanging movable part and the supporting part move downward under pressure, so that the to-be-stamped blank is gradually flanged and formed along the guide part. The bend pipe preparation die can precisely control the stress of the stamping forming process through the supporting action of the flanging movable part, so that the to-be-stamped blank is in a stable deformation state during the whole flanging deformation process, and the problems of wrinkling or rupture of the to-be-stamped blank during pressure forming are solved.

Description

Technical Field

[0001] This disclosure relates to the field of stamping die technology, and in particular to a die for preparing elbow pipe fittings. Background Technology

[0002] In the aerospace field, thin-walled tubing serves as a core load-bearing structure for critical components such as aircraft hydraulic systems, fuel lines, and engine air intakes. Its forming quality directly impacts the reliability and service life of aircraft. With the aerospace industry's pursuit of lightweight and high reliability, the structural design of thin-walled tubing exhibits characteristics such as variable cross-sections, spatial bending, and multi-layered composites, placing extremely high demands on material flow control and defect suppression in the forming process.

[0003] Currently, the manufacturing methods for thin-walled tubes mainly fall into two technical paths: rigid mold forming and flexible media forming. Rigid mold forming relies on high-precision molds to achieve plastic deformation of the material. While it ensures dimensional accuracy, the mold design cycle is long and the cost is high, making it difficult to meet the needs of small-batch, multi-variety aerospace manufacturing. Flexible media forming, on the other hand, introduces deformable force-transmitting media such as fluids, particles, and elastomers to replace traditional rigid molds for load transfer, significantly improving process flexibility and becoming the mainstream technology for solving the forming challenges of complex thin-walled tubes. Among these, rubber bladder forming is a novel technology within flexible media forming. It is a sheet metal plastic forming process that uses hydraulic pressure as the power source and rubber as the flexible force-transmitting medium. A flexible pressure cavity is formed by encasing a liquid medium in a rubber bladder, applying a uniform load to the metal sheet to achieve plastic deformation. Its core advantages are: relying on the flexible adaptability of the rubber medium, it can accurately adapt to the forming requirements of complex curved surfaces and multi-sized workpieces; the pressure distribution during load transfer is uniform, effectively avoiding the shape deviations and stress concentration problems common in traditional forming methods.

[0004] However, in the existing rubber bladder molding technology, during the compression molding process, the tube wall is prone to wrinkling or cracking due to uneven stress distribution, which directly affects the molding quality. At the same time, the traditional deep drawing process requires a large amount of edge-pressing material to be reserved when the blank is cut to ensure the edge-pressing effect, resulting in low material utilization and increased production costs. Summary of the Invention

[0005] This disclosure provides a mold for preparing elbow pipe fittings, in order to solve the problem that the sheet material is prone to wrinkling or cracking during existing rubber bladder hydraulic molding, which affects the molding quality.

[0006] The elbow pipe fitting manufacturing mold provided in this embodiment includes an upper mold, a lower mold, a flange fixing component, a flange movable component, and a support component;

[0007] The upper mold includes a stamped rubber bladder;

[0008] The lower mold and the upper mold are set at corresponding intervals;

[0009] The flange fixing member is fixed in the pressure end face of the lower mold, and a guide portion inclined towards the lower mold is formed at the center of the flange fixing member;

[0010] The flanged movable part is movably disposed in the guide portion and can slide downward along the guide portion;

[0011] The support member is vertically and vertically mounted on the lower mold, and one end of the support member abuts and supports the underside of the flange movable member;

[0012] The flange fixing component and the flange movable component together form a placement surface for placing the blank to be stamped;

[0013] The upper mold can move toward the lower mold, and the stamping rubber bladder squeezes the blank to be stamped under the action of liquid filling and pressurization.

[0014] The flanged movable part and the support part can move gradually upward under the squeezing action of the rubber bladder, so that the blank to be stamped gradually adheres to the guide part for flange forming;

[0015] Furthermore, when the support moves downward to the lowest position, the flange movable part can continue to slide downward along the guide part, and the support is inserted into and fixed in the flange movable part.

[0016] In one embodiment, the lower mold is further provided with a recessed hole concentric with the flange fixing member;

[0017] The flange fastener is fixedly wrapped around the top opening of the recessed hole;

[0018] The flanged movable part includes an overlapping part and a plugging part;

[0019] Wherein, the overlapping part overlaps and abuts with the guide part, and the plugging part abuts and abuts with the inner peripheral wall of the recessed hole;

[0020] Both the overlapping portion and the plug portion can slide downward along the recessed hole when subjected to compression.

[0021] In one embodiment, the support member is concentrically disposed in the recessed hole along the vertical direction by a support rod;

[0022] The flanged movable component also has a through hole along its vertical direction;

[0023] The support member can be supported against the lower end of the through hole and can move upward to be inserted into the through hole.

[0024] In one embodiment, the through hole includes a first hole segment and a second hole segment that are interconnected from top to bottom, and the diameter of the first hole segment is larger than the diameter of the second hole segment;

[0025] The support member includes a hemispherical support head, and the hemispherical support head is detachably mounted on the top of the support rod;

[0026] The hemispherical support head can move upwards through the second hole and be hooked into the first hole.

[0027] In one possible embodiment, the support rod is configured as a telescopic rod, and an energy storage component is sleeved on the outer peripheral wall of the telescopic rod;

[0028] The energy storage component can store elastic potential energy when the telescopic rod is compressed and contracted, and can also release elastic potential energy to extend the telescopic rod upward.

[0029] In one embodiment, the lower mold is further provided with an inserting block in the bottom surface of the recessed hole;

[0030] The flange fastener is flush-mounted and fixed in the recessed hole by the mounting block.

[0031] In one embodiment, the flange fixing member includes an outer flange fixing member and an inner flange fixing member;

[0032] The outer flange fixing member and the inner flange fixing member can be interchangeably disposed in the pressure end face of the lower mold;

[0033] The outer edge of the inner flange fixing member also forms an edge portion that is inclined toward the lower mold.

[0034] In one possible embodiment, both the guide portion and the edge portion are configured as smooth, inclined arc surfaces;

[0035] When the blank to be stamped is subjected to pressure, it can gradually deform by closely adhering to the guide portion and the edge portion respectively.

[0036] In one embodiment, the elbow fitting manufacturing mold further includes a sliding platform;

[0037] The lower mold is mounted on the sliding platform and can move in the horizontal plane under the drive of the sliding platform.

[0038] In one embodiment, the upper mold has a pressure oil supply chamber;

[0039] The stamping rubber bladder is sealed and fixed to the side of the pressure supply chamber facing the lower mold by a clamping ring;

[0040] The stamping rubber bladder can deform towards the lower mold under the oil pressure of the pressure supply chamber.

[0041] The technical solution provided in this disclosure has the following advantages compared with related technologies:

[0042] The elbow fitting preparation mold provided in this embodiment of the present disclosure also uses the liquid-filled pressurization of a stamping rubber bladder for pressing. However, throughout the entire process of the blank to be pressed under pressure deformation, the lower side of the blank to be pressed can always be kept in contact and supported by the flange moving part. Moreover, the pressing deformation process of the blank to be pressed is a gradual downward flange deformation along the guide part in the flange fixing part. The supporting action of the flange moving part realizes the precise control of the stress state during the pressing process of the fitting, which can ensure that the blank to be pressed is in a stable deformation state throughout the flange deformation process, thereby effectively avoiding the problem of wrinkling or cracking of the blank to be pressed under pressure.

[0043] In addition, the mold for preparing the elbow pipe fitting also allows the flanging movable part to be semi-suspended and movably connected to the guide part of the flanging fixed part, which cleverly transforms the traditional deep drawing forming process into the flanging forming process, avoiding the waste of a large amount of blanks to be stamped in order to meet the pressing effect.

[0044] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0045] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0046] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0047] Figure 1 A schematic diagram of the elbow fitting manufacturing mold provided in an embodiment of this disclosure is shown;

[0048] Figure 2 This diagram shows the initial stamping state of the elbow pipe fitting manufacturing die provided in an embodiment of this disclosure;

[0049] Figure 3 This diagram shows the mid-stamping state of the elbow fitting manufacturing die provided in an embodiment of this disclosure;

[0050] Figure 4 This diagram shows the final stamping state of the elbow fitting manufacturing die provided in an embodiment of this disclosure;

[0051] Figure 5 This diagram shows the stamping completion state of the elbow pipe fitting manufacturing die provided in an embodiment of this disclosure;

[0052] Figure 6 A schematic diagram showing the replacement installation of the inner flange fixing component in the elbow pipe fitting manufacturing mold provided in this embodiment of the present disclosure is shown;

[0053] The labels in the diagram are as follows: 1. Upper mold; 11. Stamping rubber bladder; 12. Pressure oil supply chamber; 13. Clamping ring;

[0054] 2. Lower mold; 21. Recessed hole; 211. Inserting clip;

[0055] 3. Flanged fastener; 31. Guide part; 32. Edge part; 301. Outer flange fastener; 302. Inner flange fastener;

[0056] 4. Flanged movable part; 41. Overlapping part; 42. Plug part; 43. Through hole;

[0057] 5. Support component; 51. Support rod; 52. Hemispherical support head; 53. Energy storage component; 6. Sliding platform. Detailed Implementation

[0058] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0059] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0060] Combination Figures 1-5 As shown, this embodiment of the present disclosure provides a mold for manufacturing elbow pipe fittings, which includes an upper mold 1, a lower mold 2, a flange fixing member 3, a flange movable member 4, and a support member 5; the upper mold 1 has a stamped rubber bladder 11; the lower mold 2 is correspondingly arranged with a gap between it and the upper mold 1; the flange fixing member 3 is fixed in the pressure-bearing end face of the lower mold 2, and a guide portion 31 inclined towards the lower mold 2 is formed at the center of the flange fixing member 3; the flange movable member 4 is movably disposed in the guide portion 31 and can slide downward along the guide portion 31; the support member 5 is vertically and vertically disposed on the lower mold 2, and one end of the support member 5 abuts and supports the lower part of the flange movable member 4;

[0061] The flange fixing part 3 and the flange movable part 4 together form a placement surface for placing the blank to be stamped; the upper mold 1 can move toward the lower mold 2, and the stamping rubber bladder 11 squeezes the blank to be stamped under the action of liquid filling and pressurization; the flange movable part 4 and the support part 5 can move downwards step by step under the squeezing action of the stamping rubber bladder 11, so that the blank to be stamped gradually adheres to the guide part 31 for flange forming; and when the support part 5 moves downwards to the lowest position, the flange movable part 4 can continue to slide downwards along the guide part 31, and the support part 5 is inserted upwards and fixed in the flange movable part 4.

[0062] The elbow pipe fitting preparation mold provided in this embodiment can be specifically, but not limited to, used for flexible stamping manufacturing of thin-walled pipe fittings. The usage process will be described using this as an example.

[0063] The specific usage process of the mold for preparing this elbow pipe fitting is as follows:

[0064] Combination Figure 1 The process involves placing the blank to be stamped into the pressure end face of the lower die 2, and having the flange fixing part 3 and the flange moving part 4 support the lower side of the blank.

[0065] Combination Figure 2 Explanation: Then the upper mold 1 can move toward the lower mold 2 and press accordingly, and the blank to be stamped will begin to be squeezed under the liquid pressure of the stamping rubber bladder 11;

[0066] Combination Figure 3 Explanation: Then, the flanging movable part 4, the support part 5, and part of the blank to be stamped can gradually move downward under the squeezing action of the stamping rubber bladder 11, and the lower side of the blank to be stamped can gradually be flanged along the guide part 31 to form the blank.

[0067] Combination Figure 4 The explanation is that when the support member 5 moves down to the lowest position, the flange movable member 4 can continue to slide down along the guide part 31 until the support member 5 can move upward, insert and fix in the flange movable member 4. At this time, the flange movable member 4 is finally fixed, and then the blank to be stamped can finally abut against the flange movable member 4 and the support member 5 to form the final shape.

[0068] Combination Figure 5 In summary, the upper mold 1 can move away from the lower mold 2 and open accordingly, so that the blank to be stamped can be stamped out to form the required structure. When the mold is opened, the flange movable part 4 is still fixed in the lower mold 2 by the support part 5.

[0069] It is also worth noting that when the aforementioned flanging movable part 4 is squeezed by the stamping rubber bladder 11, it can correspondingly shrink and deform and gradually slide downward along the guide part 31. Therefore, the flanging movable part 4 can be specifically, but not limited to, a rubber material block. In this way, during the entire process of the blank to be stamped being pressed and gradually flanged, the rubber flanging movable part 4 and the support part 5 can always maintain contact and support with the lower side of the blank to be stamped, thereby achieving precise control of the stress state during the tube pressing process. This ensures that the blank to be stamped is always in a stable deformation state during the flanging deformation process, effectively avoiding the problem of wrinkling or cracking when the blank to be stamped is pressed.

[0070] In summary, although the elbow pipe fitting preparation mold provided in this embodiment also uses the liquid-filled pressurization of the stamping rubber bladder 11 for pressing, the lower side of the blank to be pressed is always kept in contact and supported by the flanging movable part 4 throughout the entire process of the blank being pressed and deformed. Furthermore, the pressing and deformation process of the blank to be pressed is a gradual downward flanging deformation along the guide part 31 in the flanging fixing part 3. Therefore, it is ensured that the blank to be pressed is in a stable deformation state throughout the flanging deformation process, effectively avoiding wrinkling or cracking during pressing.

[0071] In addition, the elbow fitting preparation mold suspends the flanging movable part 4 in half and movably overlaps it in the guide part 31 of the flanging fixed part 3, which cleverly transforms the traditional deep drawing forming process into the flanging forming process, avoiding the waste of a large amount of blanks to be stamped in order to meet the pressing effect.

[0072] In one embodiment, the lower mold 2 is further provided with a recessed hole 21 concentric with the flange fixing member 3; the flange fixing member 3 is fixedly wrapped around the top opening of the recessed hole 21; the flange movable member 4 includes an overlapping part 41 and a plugging part 42.

[0073] The overlapping part 41 overlaps and abuts with the guide part 31, and the plugging part 42 abuts with the inner peripheral wall of the recessed hole 21; both the overlapping part 41 and the plugging part 42 can slide downward along the recessed hole 21 when subjected to compression.

[0074] Specifically, in combination Figure 1In further detail, the lower mold 2 is provided with a recessed hole 21 concentric with the flange fixing member 3. The recessed hole 21 can be, but is not limited to, a "stepped" recessed hole with a larger upper diameter and a smaller lower diameter. The flange fixing member 3 can be correspondingly fixed in the stepped section of the upper part of the recessed hole 21. In this way, when the overlapping part 41 and the guide part 31 overlap and abut against each other in the flange movable member 4, they can be synchronously arranged around the top opening of the recessed hole 21. The plugging part 42 in the flange movable member 4 can be correspondingly plugged into the lower part of the hole segment of the recessed hole 21. Both the overlapping part 41 and the plugging part 42 in the flange movable member 4 can slide downward along the lower part of the hole segment of the recessed hole 21 when subjected to compression.

[0075] The specific arrangement of the recessed hole 21 described above has the advantages of simple structure, enabling the limited and fixed installation of the flange fixing part 3, and enabling the movable limited plug-in flange movable part 4.

[0076] In one embodiment, the support member 5 is concentrically arranged in the recessed hole 21 along the vertical direction by the support rod 51; the flange movable member 4 is also provided with a through hole 43 along its own vertical direction; the support member 5 can be supported on the lower end of the through hole 43, and can move upward relative to insert into the through hole 43, and finally fix the flange movable member 4.

[0077] Specifically, in combination Figure 1 In further detail, the support rod 51 in the support member 5 is concentrically arranged in the recessed hole 21 along the vertical direction, and the flanged movable member 4 is also provided with a through hole 43 along its own vertical direction. In this way, the support member 5 can be supported on the lower end of the through hole 43. When the support member 5 moves down to a fixed height position, and the flanged movable member 4 continues to move down relative to the support member 5, the support member 5 can move upward relative to the support member 5 and insert into the through hole 43 in the flanged movable member 4.

[0078] The specific arrangement of the aforementioned support member 5 and the flanged movable member 4 is simple in structure and can be fixed by inserting the flanged movable member 4 when the support member 5 is moved to the lowest position.

[0079] In one embodiment, the through hole 43 includes a first hole segment and a second hole segment that are interconnected from top to bottom, and the diameter of the first hole segment is larger than the diameter of the second hole segment; the support member 5 includes a hemispherical support head 52, and the hemispherical support head 52 is detachably disposed at the top of the support rod 51; the hemispherical support head 52 can move upward relative to the second hole segment and be engaged with the first hole segment.

[0080] Specifically, in combination Figure 1In further detail, the through hole 43 is configured as a first hole segment and a second hole segment that are interconnected from top to bottom, and the diameter of the first hole segment is larger than the diameter of the second hole segment. In this way, the through hole 43 can also present a "stepped" shape with a larger diameter at the top and a smaller diameter at the bottom. The support member 5 also includes a hemispherical support head 52, which is detachably mounted on the top of the support rod 51 and can move upward relative to the second hole segment and be locked in the first hole segment. In this way, the hemispherical support head 52 and the "stepped surface" with a sudden change in diameter in the through hole 43 form a hook-lock structure to stably realize the function of locking and fixing the flanged movable member 4.

[0081] Combination Figure 5 To elaborate further, when the upper mold 1 moves away from the lower mold 2 and the mold opens, the hemispherical support head 52 in the support member 5 will lock and fix the flanging movable member 4, thereby avoiding the problem of the flanging movable member 4 resetting and rising during mold opening, causing damage and deformation to the molded workpiece. Moreover, after the molded workpiece is removed from the mold, the hemispherical support head 52 can be detached from the top of the support rod 51, allowing the flanging movable member 4 to reset and rise.

[0082] In one embodiment, the support rod 51 is configured as a telescopic rod, and an energy storage component 53 is sleeved on the outer peripheral wall of the telescopic rod; the energy storage component 53 can store elastic potential energy when the telescopic rod is compressed and contracted, and can also release elastic potential energy to make the telescopic rod extend upward.

[0083] Specifically, in combination Figure 1 In further detail, the support rod 51 is specifically configured as a telescopic rod, and an energy storage component 53 is sleeved on the outer peripheral wall of the telescopic rod. The energy storage component 53 can be specifically configured as a compression spring. In this way, the energy storage component 53 can further store elastic potential energy when the telescopic rod is compressed and contracted, and when the telescopic rod needs to extend and reset, the energy storage component 53 can also release its own elastic potential energy, so that the telescopic rod can reset itself and extend upward.

[0084] In addition, the spring damping effect generated by the energy storage component 53 in the support rod 51 can be coordinated with the rubber support effect generated by the flange moving component 4 to achieve precise control of the stress state during the pressing and forming of large-diameter pipe fittings, effectively suppressing wrinkling defects, and at the same time significantly reducing the blank allowance, thereby improving the forming quality of pipe fittings while reducing material consumption and manufacturing costs.

[0085] In one embodiment, the lower mold 2 is further provided with an insert block 211 in the bottom surface of the recessed hole 21; the flange fixing member 3 is flush and fixedly inserted into the recessed hole 21 by the insert block 211.

[0086] Specifically, in combination Figure 1In further detail, the mounting block 211 can be specifically, but not limited to, protruding in the "stepped surface" where the diameter of the recessed hole 21 changes abruptly, and the mounting block 211 can be provided with connecting bolts corresponding to the protrusions, so that the flanged fastener 3 can be flush and fixedly installed in the recessed hole 21 through the mounting block 211.

[0087] The specific arrangement of the above-mentioned embedded card block 211 has the advantages of simple structure, and can realize that the flange fixing part 3 is flush and seamlessly installed in the recessed hole 21 of the lower mold 2.

[0088] In one embodiment, the flange fixing member 3 includes an outer flange fixing member 301 and an inner flange fixing member 302; the outer flange fixing member 301 and the inner flange fixing member 302 can be interchangeably disposed in the pressure end face of the lower mold 2; wherein, the outer edge of the inner flange fixing member 302 is also formed with an edge portion 32 inclined towards the lower mold 2.

[0089] Specifically, in combination Figure 1 and Figure 6 Further detailed explanation, Figure 1 Specifically, the outer flange fixing piece 301 is flush with the recessed hole 21 of the lower mold 2. Figure 6 Specifically, the inner flange fixing member 302 is installed flush with the recessed hole 21 of the lower mold 2, and the outer edge of the inner flange fixing member 302 also forms an edge portion 32 that is inclined towards the lower mold 2. In this way, the inner flange fixing member 302 can simultaneously bend and shape both ends of the blank to be stamped through the guide portion 31 and the edge portion 32.

[0090] The specific arrangement of the aforementioned outer flange fixing component 301 and inner flange fixing component 302 allows for flexible replacement and installation of the two components, thus achieving the beneficial effect of producing different types of flanged and bent workpieces.

[0091] In one embodiment, the guide portion 31 and the edge portion 32 are both configured as smooth, inclined arc surfaces; the blank to be stamped can gradually deform by closely adhering to the guide portion 31 and the edge portion 32 when under pressure.

[0092] Specifically, in combination Figure 1 and Figure 6 In further detail, the guide portion 31 and the edge portion 32 are both set as smooth and inclined arc surfaces. In this way, when the blank to be stamped is under pressure, it can gradually deform and turn over by closely adhering to the guide portion 31 and the edge portion 32 respectively, so that the blank to be stamped can deform more stably and gently during the turning process.

[0093] In one embodiment, the elbow fitting preparation mold further includes a sliding platform 6; the lower mold 2 is disposed on the sliding platform 6 and can move in the horizontal plane under the drive of the sliding platform 6.

[0094] Specifically, in combination Figure 1 In further detail, the sliding platform 6 can be specifically configured to move back and forth in two different directions in the horizontal plane, such as in the x and y directions in the horizontal plane. In this way, the sliding platform 6 can drive the lower mold 2 to move to different work positions to receive materials before stamping and to feed materials after stamping.

[0095] In one embodiment, the upper mold 1 has a pressure supply oil chamber 12; the stamping rubber bladder 11 is sealed and fixed to the side of the pressure supply oil chamber 12 facing the lower mold 2 by a clamping ring 13; the stamping rubber bladder 11 can bulge and deform towards the lower mold 2 under the action of oil pressure in the pressure supply oil chamber 12.

[0096] Specifically, in combination Figure 1 , Figure 2 and Figure 3 In further detail, a pressure supply oil chamber 12 is provided in the upper mold 1, and the stamping rubber bladder 11 is sealed and fixed to the side of the pressure supply oil chamber 12 facing the lower mold 2 by a clamping ring 13. After the upper mold 1 and lower mold 2 are closed, the pressure supply oil chamber 12 can be pressurized by an external hydraulic device. This causes the stamping rubber bladder 11 to bulge and deform towards the lower mold 2, corresponding to the lower side of the stamping blank in the lower mold 2 gradually forming along the guide portion 31. After stamping, the external hydraulic device then depressurizes the pressure supply oil chamber 12, causing the stamping rubber bladder 11 to return to its original shape away from the lower mold 2.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0098] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A mold for manufacturing elbow pipe fittings, characterized in that, include: Upper mold (1), the upper mold (1) includes a stamping rubber bladder (11); The lower mold (2) is set at an interval corresponding to the upper mold (1); The flange fixing member (3) is fixed in the pressure end face of the lower mold (2), and a guide part (31) inclined towards the lower mold (2) is formed at the center of the flange fixing member (3). The flanged movable part (4) is movably disposed in the guide part (31) and can slide down along the guide part (31); The support member (5) is vertically and vertically mounted on the lower mold (2), and one end of the support member (5) abuts against and is supported below the flange movable member (4); The flange fixing part (3) and the flange movable part (4) together form a placement surface for placing the blank to be stamped; The upper mold (1) can move toward the lower mold (2) and cause the stamping rubber bladder (11) to squeeze the blank to be stamped under the action of liquid filling and pressurization; The flanging movable part (4) and the support part (5) can move gradually downward under the squeezing action of the rubber bladder (11) so that the blank to be stamped gradually flanged along the guide part (31) and formed. When the support member (5) moves downward to the lowest position, the flange movable member (4) can continue to slide downward along the guide part (31), and the support member (5) is inserted into and fixed in the flange movable member (4) relatively upward.

2. The elbow pipe fitting manufacturing mold according to claim 1, characterized in that, The lower mold (2) is also provided with a recessed hole (21) concentric with the flange fixing member (3). The flange fixing member (3) is fixedly wrapped around the top opening of the recessed hole (21); The flanged movable part (4) includes an overlapping part (41) and a plugging part (42). Wherein, the overlapping part (41) overlaps and abuts with the guide part (31), and the plugging part (42) abuts with the inner peripheral wall of the recessed hole (21). Both the overlapping portion (41) and the plug portion (42) can slide downward along the recessed hole (21) when subjected to compression.

3. The elbow pipe fitting manufacturing mold according to claim 2, characterized in that, The support member (5) is concentrically arranged in the recessed hole (21) in the vertical direction by means of the support rod (51); The flanged movable part (4) is also provided with a through hole (43) along its vertical direction; The support member (5) can be supported against the lower end of the through hole (43) and can move upward relative to be inserted into the through hole (43).

4. The elbow pipe fitting manufacturing mold according to claim 3, characterized in that, The through hole (43) includes a first hole segment and a second hole segment that are interconnected from top to bottom, and the diameter of the first hole segment is larger than the diameter of the second hole segment; The support member (5) includes a hemispherical support head (52), and the hemispherical support head (52) is detachably disposed at the top of the support rod (51); The hemispherical support head (52) can move upward relative to the second hole and be engaged in the first hole.

5. The elbow pipe fitting manufacturing mold according to claim 3, characterized in that, The support rod (51) is configured as a telescopic rod, and an energy storage component (53) is sleeved on the outer peripheral wall of the telescopic rod. The energy storage component (53) can store elastic potential energy when the telescopic rod is compressed and contracted, and can also release elastic potential energy to make the telescopic rod extend upward.

6. The elbow pipe fitting manufacturing mold according to claim 2, characterized in that, The lower mold (2) is also provided with an insert block (211) in the bottom surface of the recessed hole (21). The flange fixing member (3) is flush-fixed and fixed in the recessed hole (21) by the inserting block (211).

7. The die for manufacturing elbow pipe fittings according to any one of claims 1 to 6, characterized in that, The flange fixing component (3) includes an outer flange fixing component (301) and an inner flange fixing component (302); The outer flange fixing member (301) and the inner flange fixing member (302) can be interchangeably disposed in the pressure end face of the lower mold (2); Among them, the outer edge of the inner flange fixing member (302) is also formed with an edge portion (32) that is inclined toward the lower mold (2).

8. The elbow pipe fitting manufacturing mold according to claim 7, characterized in that, Both the guide portion (31) and the edge portion (32) are configured as smooth, inclined arc surfaces; When the blank to be stamped is subjected to pressure, it can gradually deform by closely adhering to the guide portion (31) and the edge portion (32).

9. The elbow pipe fitting manufacturing mold according to claim 7, characterized in that, The elbow pipe fitting preparation mold also includes a sliding platform (6). The lower mold (2) is disposed on the sliding platform (6) and can move in the horizontal plane under the drive of the sliding platform (6).

10. The elbow pipe fitting manufacturing mold according to claim 7, characterized in that, The upper mold (1) is provided with a pressure oil chamber (12); The stamping rubber bladder (11) is sealed and fixed to the side of the pressurized oil chamber (12) facing the lower mold (2) by a clamping ring (13); The stamping rubber bladder (11) can bulge and deform towards the lower mold (2) under the action of the oil pressure in the oil supply chamber (12).

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