Forming die for annular forge piece with cross-shaped special-shaped section

Abstract

The utility model relates to the field of forging forming, in particular to a forming die for an annular forge piece with a cross-shaped special-shaped section, which comprises an upper die, a lower die, an upper punch and a lower punch, the lower end of the inner wall of the upper die is provided with a first groove, the upper end of the inner wall of the lower die is provided with a second groove, and the first groove and the second groove define a first forming cavity; the shape of the annular forge piece is formed; a third groove is formed in the lower end of the outer wall of the upper punch, a fourth groove is formed in the upper end of the outer wall of the lower punch, and a second forming cavity is defined by the third groove and the fourth groove and used for forming the inner shape of the annular forge piece. Interference of protrusions on the inner wall and the outer wall of the cross-shaped special-shaped annular forge piece on die disassembly can be avoided, and the preformed cross-shaped special-shaped annular forge piece can be separated from the die more easily.

Description

Technical Field

[0001] The utility model relates to the field of forging and forming, and particularly relates to a forming die for a cross-shaped special-section ring forging. Background Art

[0002] As shown in Figure 1 , a titanium alloy cross-shaped special-section ring forging 1 is shown. The volume distribution of this product varies greatly. The volume in the middle of the product is about twice that at both ends of the product. The wall thickness in the middle part is 99 mm, and the wall thickness at both ends is 47 mm. Since the metal mainly flows radially during the rolling process, and this structure requires the material at both ends of the rectangular blank to flow towards the middle part, which is an axial flow, it is impossible to directly roll and form from the rectangular blank through traditional rolling. For such workpieces, it is necessary to first perform pre-forming with a loose tool, and then perform final forming through rolling. The traditional loose tool forming die includes an upper die and a lower die for forming the outer shape of the ring forging, and also includes a punch located in the middle of the ring forging for forming the inner shape of the ring forging. However, for the cross-shaped special-section ring forging, there is a protrusion 11 on both its inner wall and outer wall. After the loose tool forming, the axial limit of the protrusion 11 on the punch, the upper die and the lower die makes it difficult to remove the ring forging from the die.

[0003] Therefore, at present, a technical solution is needed to solve the technical problem that after the cross-shaped special-section ring forging is pre-formed with a loose tool, the side protrusion will get stuck on the die, making it difficult to remove the ring forging from the die. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the technical problem that after the cross-shaped special-section ring forging is pre-formed with a loose tool, the side protrusion will get stuck on the die, making it difficult to remove the ring forging, and provide a forming die for a cross-shaped special-section ring forging.

[0005] The utility model provides a forming die for a cross-shaped special-section ring forging, which includes an upper die, a lower die, an upper punch and a lower punch.

[0006] Upper die and lower die: A first groove is arranged at the lower end of the inner wall of the upper die, and a second groove is arranged at the upper end of the inner wall of the lower die. The first groove and the second groove are symmetrically arranged along the end wall of the upper die. The first groove and the second groove enclose a first forming cavity for forming the outer protrusion of the ring forging.

[0007] Upper punch and lower punch: A third groove is arranged at the lower end of the outer wall of the upper punch, and a fourth groove is arranged at the upper end of the outer wall of the lower punch. The third groove and the fourth groove are symmetrically arranged along the end wall of the upper punch. The third groove and the fourth groove enclose a second forming cavity for forming the inner protrusion of the ring forging.

[0008] The utility model discloses a cross-shaped cross-section annular forging. By symmetrically arranging a first groove and a second groove on an upper die and a lower die, the movement of the upper die and the lower die along the axial direction of the annular forging after the blank is formed is not blocked by the protrusions on the outer side wall of the annular forging. By symmetrically arranging a third groove and a fourth groove on an upper punch and a lower punch, the movement of the upper punch and the lower punch along the axial direction of the annular forging after the blank is formed is not blocked by the protrusions on the inner side wall of the annular forging, thereby making it easier for the annular forging to be separated from the die.

[0009] Preferably, the upper punch is provided with a first inner hole, and the lower punch is provided with a second inner hole.

[0010] A first inner hole is arranged along the axis of the upper punch, and a second inner hole is arranged along the axis of the lower punch. This can reduce the weight of the upper punch and the lower punch and facilitate installation. It can also facilitate removal of the upper punch and the lower punch after the annular forging is formed.

[0011] Preferably, the first inner hole and the second inner hole are coaxially arranged, the diameter of the first inner hole is d, the diameter of the second inner hole is D, and Dd=40mm±10mm.

[0012] After the upper punch and the lower punch are installed, their inner walls are in a staggered state. After the annular forging is formed, a tool can be used to reach into the second inner hole of the lower punch to support the end wall of the upper punch and the staggered part of the lower punch, thereby facilitating the removal of the upper punch and the lower punch. The diameter difference between the first inner hole and the second inner hole is set to be more than 30 mm, which can facilitate the tool to abut against the end wall of the upper punch. It is set to be less than 50 mm to reduce the weight of the upper punch.

[0013] Preferably, the sum of the heights of the upper die and the lower die is H, the sum of the heights of the upper punch and the lower punch is h, and 0≤Hh≤5mm.

[0014] After the upper die is pressed down into place, the deformation of the blank may cause the upper punch to move slightly upward. The sum of the heights of the upper die and the lower die is greater than or equal to the sum of the heights of the upper punch and the lower punch, and the difference between the two is less than 5mm. The pressing mechanism can drive the upper punch to move downward during the pressing process of the upper die, so that the upward position of the upper punch does not move more than 5mm, thereby ensuring the accuracy of the annular forging die forming.

[0015] Preferably, a pressure ring is transversely arranged at the upper end of the inner wall of the upper die, and the pressure ring is used to abut against the upper end wall of the annular forging.

[0016] During the tire mold forming process, the pressure ring on the inner side of the upper mold can limit the top of the annular forging, reduce the upward movement distance of the blank, and improve the forming accuracy of the annular forging.

[0017] Preferably, the inner diameter of the pressure ring is D1, the outer diameter of the upper punch is d1, and D1-d1=2mm±1mm.

[0018] That is, a gap of 1 mm to 3 mm is provided between the inner wall of the pressure ring and the outer wall of the upper punch, so that during the downward pressing of the upper die driven by the pressure ring, the upper punch located in the middle of the blank can be avoided, and at the same time, the forming accuracy of the annular forging die can be ensured.

[0019] Preferably, a support ring is horizontally arranged at the lower end of the inner wall of the lower die, and the support ring is used to abut against the lower end wall of the annular forging.

[0020] Contact between the blank and the workbench can be avoided. On the one hand, the flatness of the bottom wall of the blank can be more ensured, and on the other hand, it is convenient to take out the blank after forming.

[0021] Preferably, a guide groove is arranged on the inner wall of the support ring, the guide groove is arranged in a frustum shape, and an embedding section adapted to the shape of the guide groove is arranged at the lower end of the lower punch.

[0022] It is convenient to load the lower punch inside the lower die, reduces the installation difficulty of the lower punch, and avoids jamming during the installation of the lower punch.

[0023] Compared with the prior art, the beneficial effects of the present utility model are:

[0024] 1. The present utility model provides a forming die for a cross-shaped special-shaped cross-section annular forging. By symmetrically arranging a first groove and a second groove on the upper die and the lower die, the movement of the upper die and the lower die along the axial direction of the annular forging after the blank is formed is not blocked by the protrusions on the outer side wall of the annular forging;

[0025] 2. The present utility model provides a forming die for a cross-shaped special-shaped cross-section annular forging. By symmetrically arranging a third groove and a fourth groove on the upper punch and the lower punch, the movement of the upper punch and the lower punch along the axial direction of the annular forging after the blank is formed is not blocked by the protrusions on the inner side wall of the annular forging, so that the annular forging is more easily separated from the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a cross-shaped special-shaped annular forging;

[0027] Figure 2 is a schematic structural diagram of a forming die for a cross-shaped special-shaped cross-section annular forging of the present utility model;

[0028] Figure 3 is a schematic structural diagram of the upper die and the lower die of the present utility model;

[0029] Figure 4 is a schematic structural diagram of the upper punch and the lower punch of the present utility model;

[0030] Figure 5 is a usage state diagram of a forming die for a cross-shaped special-shaped cross-section annular forging of the present utility model;

[0031] Markings in the figure:

[0032] 1 - Cross-shaped special-shaped ring forging, 11 - Outer protrusion, 12 - Inner protrusion, 2 - Upper die, 21 - First groove, 22 - Pressing block, 3 - Lower die, 31 - Second groove, 32 - Support ring, 33 - Guide groove, 4 - Upper punch, 41 - Third groove, 5 - Lower punch, 51 - Fourth groove, 52 - Embedded section, 6 - First forming cavity, 7 - Second forming cavity, 8 - Blank. Specific embodiments

[0033] The following further describes the present utility model in detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. Any technology implemented based on the content of the present utility model belongs to the scope of the present utility model.

[0034] Without special instructions, in the description of the specific embodiments of the present utility model, the terms of orientation or positional relationship expressions such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / device of the present utility model is commonly used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In addition, if terms such as "horizontal", "vertical", "overhanging", "parallel" etc. appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or overhanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.

[0036] In addition, the expressions such as "first", "second", "third", etc. in the terms are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0037] In addition, in the description of the embodiments of the present utility model, "several", "multiple", and "a number of" represent at least two. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and can even be a situation where it exceeds 9.

[0038] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, when terms such as "set", "installed", "connected", "connected", "provided with", "laid", and "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be common connection means in the art such as welding, riveting, bolting, and threaded connection. Such a connection can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0039] Embodiment 1

[0040] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, a forming die for a cross-shaped special-section ring forging includes an upper die 2, a lower die 3, an upper punch 4, and a lower punch 5.

[0041] Upper die 2, lower die 3: At the lower end of the inner wall of the upper die 2, a first groove 21 is provided. At the upper end of the inner wall of the lower die 3, a second groove 31 is provided. The first groove 21 and the second groove 31 are symmetrically arranged along the end wall of the upper die. The first groove 21 and the second groove 31 enclose a first forming cavity 6 for forming the outer protrusion 11 of the ring forging.

[0042] Upper punch 4, lower punch 5: At the lower end of the outer wall of the upper punch 4, a third groove 41 is provided. At the upper end of the outer wall of the lower punch 5, a fourth groove 51 is provided. The third groove 41 and the fourth groove 51 are symmetrically arranged along the end wall of the upper punch 4. The third groove 41 and the fourth groove 51 enclose a second forming cavity 7 for forming the inner protrusion 12 of the ring forging.

[0043] By symmetrically arranging the first groove 21 and the second groove 31 on the upper die 2 and the lower die 3, the movement of the upper die 2 and the lower die 3 along the axial direction of the ring forging after the blank is formed is not blocked by the protrusion 11 on the outer side wall of the ring forging. By symmetrically arranging the third groove 41 and the fourth groove 51 on the upper punch 4 and the lower punch 5, the movement of the upper punch 4 and the lower punch 5 along the axial direction of the ring forging after the blank 8 is formed is not blocked by the protrusion 11 on the inner side wall of the cross-shaped special-section ring forging 1, so that the ring forging is easier to be separated from the die.

[0044] Upper punch 4 and lower punch 5: The upper punch 4 is provided with a first inner hole, the diameter of the first inner hole is d, and the lower punch 5 is provided with a second inner hole, the diameter of the second inner hole is D, 30mm≤D and d difference≤50mm, during installation, the first inner hole and the second inner hole are in a coaxial state, and the inner walls of the first inner hole and the second inner hole are in a staggered state. After the annular forging is formed, a tool can be used to extend into the second inner hole of the lower punch 5 to support the end wall of the upper punch 4 and the staggered part of the lower punch 5, thereby facilitating the removal of the upper punch 4 and the lower punch 5.

[0045] Example 2

[0046] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the difference from Embodiment 1 is that the sum of the heights of the upper die 2 and the lower die 3 is H, the sum of the heights of the upper punch 4 and the lower punch 5 is h, and 0≤Hh≤5mm.

[0047] In this embodiment, after the upper die 2 is pressed down into place, the deformation of the blank may cause the position of the upper punch 4 to move slightly upward. The sum of the heights of the upper die 2 and the lower die 3 is greater than or equal to the sum of the heights of the upper punch 4 and the lower punch 5, and the difference between the two is less than 5 mm. The pressing mechanism can drive the upper punch 4 to move downward during the pressing process of the upper die 2, so that the upward position of the upper punch 4 does not move more than 5 mm, thereby ensuring the accuracy of the annular forging die forming.

[0048] Example 3

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, the present embodiment is different from the embodiment 1 in that a pressure ring 22 is transversely arranged at the upper end of the inner wall of the upper die 2, and the pressure ring 22 is used to abut against the upper end wall of the annular forging.

[0050] During the tire mold forming process, the pressure ring 22 on the inner side of the upper mold 2 can limit the top of the annular forging, reduce the upward movement distance of the blank, and improve the forming accuracy of the annular forging.

[0051] Furthermore, the inner diameter of the pressure ring 22 is D1, the outer diameter of the upper punch 4 is d1, D1-d1=2mm±1mm, that is, a gap of 1mm to 3mm is set between the inner wall of the pressure ring 22 and the outer wall of the upper punch 4, so that when the pressure ring 22 drives the upper die 2 to press down, it can avoid the upper punch 4 located in the middle of the blank, and at the same time, it can ensure the forming accuracy of the annular forging membrane, and also facilitate the separation of the upper punch 4 and the upper die 2 after forming.

[0052] Example 4

[0053] like Figure 2 , Figure 3 ,Figure 4 and Figure 5 In this embodiment, the difference from Embodiment 1 is that a support ring 32 is horizontally arranged at the lower end of the inner wall of the lower die 3, and the support ring 32 is used to abut against the lower end wall of the annular forging.

[0054] In this embodiment, the support ring 32 arranged on the inner wall of the lower die 3 can prevent the blank 8 from contacting the workbench. On the one hand, it can better ensure the flatness of the bottom wall of the blank 8, and on the other hand, it is convenient to take out the blank 8 after forming.

[0055] Furthermore, a guiding groove 33 is arranged on the inner wall of the support ring 32. The guiding groove 33 is arranged in a frustum shape with the large end facing upward. An embedding section 52 adapted to the shape of the guiding groove 33 is arranged at the lower end of the lower punch 5, which is convenient for loading the lower punch 5 inside the lower die 3, reduces the installation difficulty of the lower punch 5, and avoids jamming during the installation of the lower punch 5.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A forming die for a ring forging with a cross-shaped special-shaped section, characterized in that It includes an upper die (2), a lower die (3), an upper punch (4) and a lower punch (5): Upper die (2), lower die (3): At the lower end of the inner wall of the upper die (2), a first groove (21) is provided. At the upper end of the inner wall of the lower die (3), a second groove (31) is provided. The first groove (21) and the second groove (31) enclose a first forming cavity (6), and the first forming cavity (6) is used for forming the outer protrusion (11) of the annular forging; Upper punch (4), lower punch (5): At the lower end of the outer wall of the upper punch (4), a third groove (41) is provided. At the upper end of the outer wall of the lower punch (5), a fourth groove (51) is provided. The third groove (41) and the fourth groove (51) enclose a second forming cavity (7), and the second forming cavity (7) is used for forming the inner protrusion (12) of the annular forging.

2. The forming die for a cross-shaped special-section ring forging according to claim 1, characterized in that, The upper punch (4) is provided with a first inner hole, and the lower punch (5) is provided with a second inner hole.

3. The forming die for a cross-shaped special-section ring forging according to claim 2, characterized in that, The first inner hole and the second inner hole are coaxially arranged. The diameter of the first inner hole is d, and the diameter of the second inner hole is D, D - d = 40mm ± 10mm.

4. A forming die for a cross-shaped special-section ring forging according to claim 1, characterized in that, The sum of the heights of the upper die (2) and the lower die (3) is H, and the sum of the heights of the upper punch (4) and the lower punch (5) is h, 0 ≤ H - h ≤ 5mm.

5. A cross-shaped special-section ring forging forming die according to claim 1, characterized in that, A pressure ring (22) is horizontally arranged at the upper end of the inner wall of the upper die (2), and the pressure ring (22) is used to abut against the upper end wall of the annular forging.

6. The forming die for a cross-shaped special-section ring forging according to claim 5, characterized in that, The inner diameter of the pressure ring (22) is D1, and the outer diameter of the upper punch (4) is d1, D1 - d1 = 2mm ± 1mm.

7. A forming die for a cross-shaped special-section ring forging according to claim 1, characterized in that, A support ring (32) is horizontally arranged at the lower end of the inner wall of the lower die (3), and the support ring (32) is used to abut against the lower end wall of the annular forging.

8. A forming die for a cross-shaped special-section ring forging according to claim 7, characterized in that, A guide groove (33) is provided on the inner wall of the support ring (32). The guide groove (33) is arranged in a frustum shape, and an embedding section (52) adapted to the shape of the guide groove (33) is provided at the lower end of the lower punch.

Images