Forging die for long-strip-shaped titanium alloy forge piece with high rib and deep cavity

Abstract

The utility model discloses a forging die for a long-strip-shaped titanium alloy forge piece with a high rib and a deep cavity, which comprises an upper die and a lower die, the upper die is a flat plate die, and the lower die comprises a lower die body, a cavity, a bridge part and a stock bin. The upper die is a flat plate die, the lower die comprises a die with a cavity, a guide column and guide sleeve structure does not need to be designed, the structure is simple and reasonable, and the problem that forge pieces are scrapped due to die shifting in the prior art can be solved; a high-rib groove is formed in the middle of the cavity in a concave mode, and protrusions are arranged on one side or two sides of the high-rib groove, so that the die can forge long-strip-shaped titanium alloy forgings containing high ribs and deep cavities, the stock bin is open in the length extending direction, the flowing resistance of titanium alloy materials in the length direction can be reduced, and the filling effect of the large-size long-strip-shaped titanium alloy forgings can be improved; and the working pressure of the hydraulic machine is reduced, the thickness of the die is reduced, and the manufacturing cost of the die is reduced.

Description

Technical Field

[0001] This utility model relates to forging dies, and more particularly to a forging die for elongated titanium alloy forgings with oblique high ribs and deep cavities. Background Technology

[0002] For large-sized (length over 2000mm, height over 200mm, width over 500mm) long strip-shaped titanium alloy forgings (see...) Figure 1 For forgings, the large size of the forgings leads to a corresponding increase in the size of the mold (length over 2500 mm, width over 1200 mm), resulting in extremely high mold manufacturing costs. In addition, to prevent misalignment during the forging process and thus scrap the forgings, this type of mold structure requires a series of additional guiding devices such as guide pillars and guide sleeves, in addition to the upper mold, lower mold, and ejector pin.

[0003] On the other hand, titanium alloys have characteristics such as high deformation resistance, high metal viscosity, and narrow forging temperature window during die forging. Titanium alloy forgings with high ribs (height greater than 200mm) and deep cavities (depth greater than 150mm) have even greater forming resistance and require greater force during forging. Heavy-duty die forging hydraulic presses with a capacity of more than 30,000 tons are required for forging. This necessitates increasing the die thickness (≥500mm) during mass production of forgings to improve their structural strength and service life, further increasing the die manufacturing cost. Utility Model Content

[0004] In view of this, the main purpose of this utility model is to provide a forging die for long strip-shaped titanium alloy forgings with high ribs and deep cavities, which can solve the problem that the die is prone to misalignment during the forging process of large-sized long strip-shaped forgings with high ribs and deep cavities in the prior art, and that the force required during forging is large.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity includes: an upper die and a lower die. The upper die is a flat die. The lower die includes: a lower die body, a cavity, a bridge, and a hopper. The cavity is formed on the upper surface of the lower die body. The bridge is protruding around the edge of the cavity. The hopper is recessed on the outer side of the bridge. The hopper is open in the length extension direction.

[0007] The cavity is recessed in the middle with a high rib groove, and a protrusion is provided on one or both sides of the high rib groove.

[0008] In a preferred embodiment, the device further includes an ejector, which comprises an ejector rod and an ejector rod hole, wherein the ejector rod hole penetrates the lower mold body and communicates with the cavity, and the ejector rod is slidably connected in the ejector rod hole.

[0009] In a preferred embodiment, the ejector device is divided into an upper section and a lower section, the upper section and the lower section are coaxial, the junction of the upper section and the lower section is smoothly transitioned, the gap A1 between the ejector rod and the ejector rod hole in the upper section is 1-1.5mm, and the gap A2 between the ejector rod and the ejector rod hole in the lower section is 2-2.5mm.

[0010] In a preferred embodiment, the push rod hole is a stepped hole, and the diameter of the push rod hole at the upper position is smaller than the diameter of the push rod hole at the lower position.

[0011] In a preferred embodiment, the top rod is a stepped rod, and the diameter of the top rod at the upper section is larger than the diameter of the top rod at the lower section.

[0012] In a preferred embodiment, the height of the bridge section is lower than the upper surface of the lower mold body, and the bottom of the hopper is lower than the bridge section.

[0013] In a preferred embodiment, the draft angle a1 at the high rib groove is 15°-25°, and the fillet radius R1 at the high rib groove is 40-60mm.

[0014] In a preferred embodiment, T-slots are provided on the upper surface of the upper mold and the lower surface of the lower mold. The T-slots are formed on both end faces of the upper and lower molds, and the direction of the T-slots is the same as the length direction of the upper and lower molds.

[0015] In a preferred embodiment, the upper surface of the upper mold and the lower surface of the lower mold are provided with a first positioning keyway and a second positioning keyway;

[0016] The first positioning keyway is disposed on both ends of the upper or lower mold, and the first positioning keyway is in the same length direction as the upper or lower mold;

[0017] The second positioning keyway is disposed on both sides of the upper or lower mold, and the second positioning keyway is in the same direction as the width of the upper or lower mold.

[0018] In a preferred embodiment, lifting holes are provided on both sides of the upper mold and the lower mold, with two lifting holes provided on each side, and the two lifting holes are arranged symmetrically.

[0019] The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity, according to this utility model, has the following beneficial effects:

[0020] The forging die for the long strip-shaped titanium alloy forging with high ribs and a deep cavity includes an upper die and a lower die. The upper die is a flat die, and the lower die includes a lower die body, a cavity, a bridge, and a hopper. The cavity is formed on the upper surface of the lower die body, and a bridge is formed around the edge of the cavity. A hopper is recessed on the outer side of the bridge and is open in the length extension direction. A high rib groove is recessed in the middle of the cavity, and a protrusion is provided on one or both sides of the high rib groove.

[0021] In this invention, the upper mold is a flat mold, and the lower mold includes a cavity, which can solve the problem of mold misalignment causing scrap of forgings in the prior art. The cavity is recessed with a high rib groove, and protrusions are provided on one or both sides of the high rib groove, so that the mold can forge long strip titanium alloy forgings with high ribs and deep cavities. The material bin is open in the length extension direction, which can reduce the flow resistance of titanium alloy material in the length direction. For large-sized long strip titanium alloy forgings, it can improve the filling effect and reduce the pressure of the hydraulic press during operation.

[0022] The forging die for the long strip-shaped titanium alloy forging with high ribs and deep cavity has a flat upper die and does not require the design of guide pillars and guide sleeves. The structure is simple and reasonable. In addition, the material hopper is open in the length extension direction, which reduces the pressure when the press is working and can reduce the thickness of the die, thereby reducing the die manufacturing cost. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a forging die for a high-rib, deep-cavity elongated titanium alloy forging according to one embodiment of the present disclosure.

[0025] Figure 2 This is a schematic diagram of the lower die structure of a forging die for a long strip-shaped titanium alloy forging with high ribs and deep cavities according to an embodiment of the present disclosure.

[0026] Figure 3 A cross-sectional view of the lower die and ejection device of a forging die for a high-ribbed, deep-cavity elongated titanium alloy forging according to an embodiment of the present disclosure.

[0027] Figure 4 This is a partially enlarged view of a forging die for a high-rib, deep-cavity elongated titanium alloy forging according to one embodiment of the present disclosure;

[0028] Figure 5This is a schematic diagram showing the installation of a forging die and a hydraulic press die base for a long strip-shaped titanium alloy forging with high ribs and a deep cavity, according to one embodiment of the present disclosure.

[0029] Figure 6 This is a structural schematic diagram of a long strip-shaped titanium alloy forging with high ribs and deep cavity according to one embodiment of the present disclosure.

[0030] [Explanation of Key Component Symbols]

[0031] 1. Upper mold;

[0032] 2. Lower mold;

[0033] 21. Lower mold body; 22. Cavity; 23. Bridge section; 24. Material bin; 25. High rib groove; 26. Protrusion; 27. T-slot; 28. First positioning keyway; 29. ​​Second positioning keyway; 210. Lifting hole.

[0034] 3. Ejection device;

[0035] 31. Push rod; 32. Push rod hole; 33. Upper section; 34. Lower section;

[0036] 4. Forgings; 41. High-ribbed forgings; 42. Deep cavities;

[0037] 5. Hydraulic press mold base;

[0038] 51. Fasteners;

[0039] 52. Key;

[0040] 6. High gluten content;

[0041] 7. Deep cavity. Detailed Implementation

[0042] The method of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] See Figures 1-6 This utility model provides a technical solution:

[0048] A forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity includes an upper die 1 and a lower die 2. The upper die 1 is a flat die, and the lower die 2 includes a lower die body 21, a cavity 22, a bridge portion 23, and a material hopper 24. The cavity 22 is formed on the upper surface of the lower die body 21, and the bridge portion 23 is protruding around the edge of the cavity 22. The material hopper 24 is recessed on the outer side of the bridge portion 23 and is open in the length extension direction. A high rib groove 25 is recessed in the middle of the cavity, and a protrusion 26 is provided on one or both sides of the high rib groove 25. The height of the bridge portion 23 is lower than the upper surface of the lower die body 21, and the bottom of the material hopper 24 is lower than the bridge portion 23. The upper die 1 is a flat die, which can use the flat die of existing technology. The lower die 2 is a die containing a cavity, which eliminates the need for designing guide pillars and guide sleeves. The structure is simple and reasonable, which can solve the problem of forging scrap caused by die misalignment in existing technology, and saves an upper die, reducing die cost. The cavity 22 has a recessed high rib groove 25 in the middle, and a protrusion 26 is provided on one or both sides of the high rib groove 25. The high rib groove 25 in the lower die 2 corresponds to the high rib 6 in the forging, and the protrusion 26 in the lower die 2 corresponds to the deep cavity 7 in the forging. This allows the die to forge a long strip of titanium alloy forging containing high rib 6 and deep cavity 7. The material bin 24 is open in the length extension direction, which can reduce the flow resistance of titanium alloy material in the length direction. For large-sized long strip of titanium alloy forging, it can improve its filling effect, reduce the pressure of the hydraulic press during operation, reduce the thickness of the die, and reduce the die manufacturing cost.

[0049] The height of the bridge portion 23 of the mold is lower than the upper surface of the lower mold body 21, and the bottom of the hopper 24 is lower than the bridge portion 23. In this way, the bridge portion 23 can prevent the flow of titanium metal, force the metal to fill the cavity 22, and reduce the flash for easy removal, while the hopper can hold excess titanium alloy metal.

[0050] Since long, strip-shaped titanium alloy forgings with high ribs and deep cavities are generally over 2000mm in length and over 500mm in width, to facilitate demolding and prevent severe warping that could lead to dimensional defects, the forging die for these forgings also includes an ejector device 3. This ejector device comprises an ejector rod 31 and an ejector rod hole 32. The ejector rod hole 32 penetrates the lower die body 21 and communicates with the cavity 22. The ejector rod 31 is slidably connected within the ejector rod hole 32. During demolding, the ejector rod 31 can be pressed down, causing it to eject the forging from the cavity 22. Due to the large size of the forgings, the ejector device 3 can be installed at 3-8 points along its length.

[0051] The ejector device 3 is divided into an upper section 33 and a lower section 34. The upper section 33 and the lower section 34 are coaxial, and their junction is smoothly transitioned. The gap A1 between the ejector rod 31 and the ejector rod hole 32 in the upper section 33 is 1-1.5mm, and the gap A2 between the ejector rod 31 and the ejector rod hole 32 in the lower section 34 is 2-2.5mm. Here, the gap refers to the distance between the ejector rod 31 and the ejector rod hole 32 when they are placed coaxially. The upper section 33 is a guide section. The smaller gap A1 in the upper section 33 prevents the ejector rod 31 from tilting in the ejector rod hole 32, allowing the ejector device 3 to eject quickly and smoothly without jamming. The length of the upper section 33 is generally 80-100mm. The remaining part is the lower section 34. The larger gap A2 in the lower section 34 is 2-2.5mm. The lower section 34 does not have a guiding function, and its machining accuracy is strictly controlled to reduce machining costs.

[0052] To facilitate the design and fabrication of the ejector device 3, one embodiment is as follows: the ejector hole 32 can be a stepped hole, with the diameter of the ejector hole 32 at the upper section 33 position being smaller than the diameter of the ejector hole 32 at the lower section 34 position, while the diameter of the ejector 31 is consistent from top to bottom.

[0053] To facilitate the design and fabrication of the ejector device 3, another implementation method is as follows: the ejector rod 31 is a stepped rod, and the diameter of the ejector rod 31 at the upper section 33 position is larger than the diameter of the ejector rod 31 at the lower section 34 position. In this case, the diameter of the ejector rod hole is consistent from top to bottom.

[0054] Since the height of the high rib 6 of the forging is generally above 200mm, in order to facilitate demolding, the draft angle a1 at the high rib groove 25 is 15°-25°, preferably 20°. In order to improve the fluidity of the titanium alloy billet in the mold cavity, the fillet R1 at the high rib groove 25 is 40-60mm, preferably 50mm. The draft angle a2 at other positions is 5°-10°, and the fillet R2 is 10-30mm.

[0055] To facilitate mold fixing, T-slots 27 are provided on the upper surface of the upper mold 1 and the lower surface of the lower mold 2. The T-slots 27 are formed on both ends of the upper mold 1 and the lower mold 2, and their direction is the same as the length direction of the upper mold 1 and the lower mold 2. For secure fixing, two T-slots are provided on each cross-section, symmetrically arranged. The positions of the T-slots are adapted to the hydraulic press mold base 5. The upper mold 1 / lower mold 2 is fixedly connected to the hydraulic press mold base 5 using fasteners 51, typically bolts and nuts. Using the T-slots 27 and bolts and nuts, the mold can be vertically fixed on the forging hydraulic press, preventing the mold from jumping up and down due to the ejection force when the forging is ejected, thus ensuring smooth demolding.

[0056] The upper surface of the upper mold 1 and the lower surface of the lower mold 2 are provided with a first positioning keyway 28 and a second positioning keyway 29. The opening positions of the first positioning keyway 28 and the second positioning keyway 29 are adapted to the hydraulic press mold base 5. The upper mold 1 / lower mold 2 is positioned and connected to the hydraulic press mold base 5 using key 52, so as to realize the positioning of the mold on the hydraulic press mold base 5 and prevent horizontal displacement during the working process of the mold.

[0057] The first positioning keyway 28 is provided on both ends of the upper mold 1 or the lower mold 2. The first positioning keyway 28 is in the same length direction as the upper mold 1 or the lower mold 2; it can prevent the upper mold 1 / lower mold 2 from moving in the width direction.

[0058] The second positioning keyway 29 is disposed on both sides of the upper mold 1 or the lower mold 2, and the second positioning keyway 29 is in the same direction as the width of the upper mold 1 or the lower mold 2. This prevents the upper mold 1 / lower mold 2 from moving in the length direction.

[0059] To facilitate mold hoisting, hoisting holes 210 are provided on both sides of the upper mold 1 and the lower mold 2, with two hoisting holes 210 on each side, and the two hoisting holes 210 are symmetrically arranged. The hoisting holes have a diameter of φ50-60mm and a depth of 80-100mm, and steel bars can be inserted to facilitate convenient transportation and installation of the mold during use.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity, characterized in that, include: The upper mold (1) and the lower mold (2) are provided. The upper mold (1) is a flat mold. The lower mold (2) includes a lower mold body (21), a cavity (22), a bridge (23) and a hopper (24). The cavity (22) is provided on the upper surface of the lower mold body (21). The bridge (23) is provided around the edge of the cavity (22). The hopper (24) is recessed on the outer side of the bridge (23). The hopper (24) is open in the length extension direction. The cavity is recessed in the middle and has a high rib groove (25), and a protrusion (26) is provided on one or both sides of the high rib groove (25).

2. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, Also includes: Ejection device (3), the ejection device includes: ejector rod (31) and ejector rod hole (32), the ejector rod hole (32) passes through the lower mold body (21) and communicates with the cavity (22), the ejector rod (31) is slidably connected in the ejector rod hole (32).

3. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 2, characterized in that, The ejector device (3) is divided into an upper section (33) and a lower section (34). The upper section (33) and the lower section (34) are coaxial. The junction of the upper section (33) and the lower section (34) is smoothly transitioned. The gap A1 between the ejector rod (31) and the ejector rod hole (32) in the upper section (33) is 1-1.5mm. The gap A2 between the ejector rod (31) and the ejector rod hole (32) in the lower section (34) is 2-2.5mm.

4. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 3, characterized in that, The top rod hole (32) is a stepped hole, and the diameter of the top rod hole (32) at the upper section (33) position is smaller than the diameter of the top rod hole (32) at the lower section (34) position.

5. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 3, characterized in that, The top rod (31) is a stepped rod, and the diameter of the top rod (31) at the upper section (33) is larger than the diameter of the top rod (31) at the lower section (34).

6. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, The height of the bridge section (23) is lower than the upper surface of the lower mold body (21), and the bottom of the hopper (24) is lower than the bridge section (23).

7. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, The draft angle a1 at the high rib groove (25) is 15°-25°, and the fillet R1 at the high rib groove (25) is 40-60mm.

8. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, T-slots (27) are provided on the upper surface of the upper mold (1) and the lower surface of the lower mold (2). The T-slots (27) are opened on both ends of the upper mold (1) and the lower mold (2). The opening direction of the T-slots (27) is the same as the length direction of the upper mold (1) and the lower mold (2).

9. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, The upper surface of the upper mold (1) and the lower surface of the lower mold (2) are provided with a first positioning keyway (28) and a second positioning keyway (29); The first positioning keyway (28) is provided on both ends of the upper mold (1) or the lower mold (2), and the first positioning keyway (28) is in the same length direction as the upper mold (1) or the lower mold (2); The second positioning keyway (29) is provided on both sides of the upper mold (1) or the lower mold (2), and the second positioning keyway (29) is in the same width direction as the upper mold (1) or the lower mold (2).

10. The forging die for a long strip-shaped titanium alloy forging with high ribs and a deep cavity according to claim 1, characterized in that, The upper mold (1) and the lower mold (2) have two lifting holes (210) on each side, and the two lifting holes (210) are symmetrically arranged.

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