Forging and pressing composite die for producing powder superalloy turbine disc and production method

Abstract

The invention discloses a forging and pressing composite die for producing a powder superalloy turbine disc and a production method, and relates to the technical field of machining dies. The die comprises an upper die sleeve, an upper die core, a lower die sleeve, a lower die core, a sizing block and a blank. The upper die core is movably sleeved with the upper die sleeve, the lower die core is movably sleeved with the lower die sleeve, an upper inserting groove is formed in the outer portion of the upper die core, upper plug iron is installed in the upper inserting groove, a lower inserting groove is formed in the outer portion of the lower die core, lower plug iron is installed in the lower inserting groove, and the upper die sleeve and the lower die sleeve are both made of 5CrNiMo steel. The temperature of the upper die sleeve and the temperature of the lower die sleeve are both 350 DEG C, the upper die core and the lower die core are both made of GH4169 steel, the temperature of the upper die core and the temperature of the lower die core are both 850 DEG C, the blank is made of GNPM01 steel, and the temperature of the blank is 1120 DEG C. The temperature difference between the upper die core and the blank and between the lower die core and the blank can be reduced through the upper die core and the lower die core at the temperature of 850 DEG C, so that the surface of a forged piece is prevented from being torn after forging, and the forging quality of the alloy turbine disc is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of processing molds, and in particular relates to a forging composite mold and a production method for producing a powder high-temperature alloy turbine disk. Background Art

[0002] In aircraft engines, high-temperature alloy turbine disks are important components that connect turbine blades and turbine shafts and drive the compressor to rotate at high speed. They are subjected to complex stress conditions and are crucial to the normal operation of the engine and even related to flight safety. In modern advanced aircraft engines, the proportion of high-temperature alloys has reached about 80%, and the turbine disk is one of the core components. It is called the most core component in aircraft engines and is an irreplaceable type of key material for the hot end components of aircraft engines. The performance of high-temperature alloy turbine disks directly affects the performance, reliability and service life of aircraft engines. Powder high-temperature alloy turbine disks are made of high-temperature alloys generated by powder metallurgy as raw materials. Compared with ordinary high-temperature alloy turbine disks, powder high-temperature alloy turbine disks have the advantages of high strength, high tensile strength, strong creep resistance, good high temperature resistance, long service life, and large damage tolerance. They have become the preferred turbine disk product for aircraft engines.

[0003] When producing high-temperature alloy turbine disc forgings, dies are required for forging. However, in traditional die forging, the preheating temperature of the die (material 5CrNiMo) is low (300-350℃), and the heat dissipation of the billet is fast after contact with the die, resulting in low temperature and difficulty in deformation of the billet in the later stage of forging, which causes tearing on the surface of the forging after forging, seriously affecting the quality of the product and even posing the risk of scrapping.

[0004] To this end, we provide a forging composite die and production method for producing powder high-temperature alloy turbine disks to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] The purpose of the present invention is to provide a forging composite die and production method for producing powder high-temperature alloy turbine disks. The temperature difference between the upper die core, the lower die core and the blank is reduced by using the upper die core and the lower die core at 850°C, thereby solving the problems of low preheating temperature of the existing die (300-350°C), fast heat dissipation of the blank after contact with the die, low temperature of the blank in the later stage of forging, difficulty in deformation, and tearing on the surface of the forging after forging, which seriously affects product quality.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention relates to a forging composite die and a production method for producing a powder high-temperature alloy turbine disk, comprising an upper die sleeve, an upper die core, a lower die sleeve, a lower die core, a washer and a blank; the upper die core is movably sleeved inside the upper die sleeve, the lower die core is movably sleeved inside the lower die sleeve, the washer is placed between the upper die core and the lower die core, an upper slot is provided on the outside of the upper die core, an upper plug is installed inside the upper slot, and the upper plug is inserted between the upper die core and the upper die sleeve, a lower slot is provided on the outside of the lower die core, a lower plug is installed inside the lower slot, and the lower plug is inserted between the lower die core and the lower die sleeve.

[0009] The present invention is further configured such that both the upper die sleeve and the lower die sleeve are made of 5CrNiMo steel, and the temperatures of the upper die sleeve and the lower die sleeve are both 350°C.

[0010] The present invention is further configured such that both the upper mold core and the lower mold core are made of GH4169 steel, and both the upper mold core and the lower mold core are 850°C.

[0011] The present invention is further configured such that the blank is made of GNPM01 steel, and the temperature of the blank is 1120°C.

[0012] The present invention is further configured such that the shim is made of 45# steel and the temperature of the shim is 1000°C.

[0013] The present invention is further configured such that the upper die sleeve and the upper die core are matched in taper, and the lower die sleeve and the lower die core are matched in taper.

[0014] At the same time, in order to solve the above technical problems, the present invention also provides the following technical solutions: A method for using a forging composite die for producing a powder high-temperature alloy turbine disk specifically comprises the following steps:

[0015] S1. Install the lower mold core inside the lower mold sleeve;

[0016] S2, insert the lower plug iron into the lower slot to fix the lower mold core and the lower mold sleeve;

[0017] S3. Place the pad iron flat on the top of the lower mold core;

[0018] S4. Place the upper mold core flat on the top of the pad iron;

[0019] S5, installing the upper mold sleeve on the outside of the upper mold core;

[0020] S6, insert the upper plug iron into the upper slot to fix the upper die core and the upper die sleeve;

[0021] S7. Remove the pad iron and place the blank on the top of the lower die core for forging.

[0022] The present invention has the following beneficial effects:

[0023] 1. The present invention can reduce the temperature difference between the upper die core and the lower die core and the blank by using the upper die core and the lower die core at 850°C, thereby avoiding tearing on the surface of the forging after forging and ensuring the forging quality of the alloy turbine disk.

[0024] 2. The present invention can reduce the heat loss of the upper mold core and the lower mold core during the installation process by using the 1000°C pad iron, thereby avoiding excessive temperature difference between the upper mold core, the lower mold core and the blank.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0027] Figure 1 It is a schematic diagram of the composite mold structure implemented in the present invention.

[0028] Figure 2 It is a schematic diagram of the blank after the first step of the implementation of the present invention is completed.

[0029] Figure 3 It is a schematic diagram of a forging after the second step of the implementation of the present invention is completed.

[0030] Figure 4 It is a schematic diagram of a forging after the third step of the implementation of the present invention is completed.

[0031] Figure 5 It is a schematic diagram of a forging after the fourth step of the implementation of the present invention is completed.

[0032] Figure 6 It is a schematic diagram of a forging after the fifth step of the implementation of the present invention is completed.

[0033] Figure 7 It is a schematic diagram of a forging after the sixth step of the implementation of the present invention is completed.

[0034] Figure 8 It is a schematic diagram of the forging after the shim is removed in step seven of the implementation of the present invention.

[0035] Fig. 9 It is a schematic diagram of forging after placing the blank in step seven of the implementation of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] 1. Upper die sleeve; 2. Upper plug iron; 3. Upper die core; 4. Lower die core; 5. Lower plug iron; 6. Lower die sleeve; 7. Washer iron; 8. Blank; 9. Upper slot; 10. Lower slot. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from the description, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0042] Example 1

[0043] See also Figures 1 to 9 The present invention discloses a forging composite die and a production method for producing a powder high-temperature alloy turbine disk, comprising an upper die sleeve 1, an upper die core 3, a lower die sleeve 6, a lower die core 4, a washer 7 and a blank 8; the upper die core 3 is movably sleeved inside the upper die sleeve 1, the lower die core 4 is movably sleeved inside the lower die sleeve 6, the washer 7 is placed between the upper die core 3 and the lower die core 4, an upper slot 9 is provided on the outside of the upper die core 3, an upper plug 2 is installed inside the upper slot 9, and the upper plug 2 is inserted between the upper die core 3 and the upper die sleeve 1, a lower slot 10 is provided on the outside of the lower die core 4, a lower plug 5 is installed inside the lower slot 10, and the lower plug 5 is inserted between the lower die core 4 and the lower die sleeve 6, and the upper die core 3 and the lower die core 4 can be fixed by the upper plug 2 and the lower plug 5 respectively.

[0044] Specifically, the upper die sleeve 1 and the lower die sleeve 6 are both made of 5CrNiMo steel, and the temperature of the upper die sleeve 1 and the lower die sleeve 6 is 350°C;

[0045] The upper mold core 3 and the lower mold core 4 are both made of GH4169 steel, and the upper mold core 3 and the lower mold core 4 are both 850°C;

[0046] The blank 8 is made of GNPM01 steel, and the temperature of the blank 8 is 1120°C. By heating the upper die sleeve 1 and the lower die sleeve 6 to 350°C, the upper die core 3 and the lower die core 4 to 850°C, and the blank 8 to 1120°C, the temperature difference between the upper die core 3 and the lower die core 4 and the blank 8 can be reduced, thereby avoiding tearing on the surface of the forging after forging and ensuring the forging quality;

[0047] The shim 7 is made of 45# steel, and the temperature of the shim 7 is 1000°C. The shim 7 at 1000°C can reduce the heat loss of the upper mold core 3 and the lower mold core 4 during the installation process.

[0048] Furthermore, the upper die sleeve 1 and the upper die core 3 are tapered together, and the lower die sleeve 6 and the lower die core 4 are tapered together.

[0049] The operation process of this embodiment is as follows: when the turbine disk needs to be processed, firstly, the upper mold core 3 and the lower mold core 4 are heated to 850°C, the blank 8 is heated to 1120°C, the upper mold sleeve 1 and the lower mold sleeve 6 are heated to 350°C, and the washer 7 is heated to 1000°C, then the lower mold core 4 is installed inside the lower mold sleeve 6, and then the lower plug iron 5 is inserted into the lower slot 10 to fix the lower mold core 4, and then the washer 7 is placed flat on the top of the lower mold core 4, so as to reduce the upper mold The upper die core 3 and the lower die core 4 lose heat during the installation process, and then the upper die core 3 is placed flat on the top of the pad iron 7, and then the upper plug iron 2 is inserted into the upper slot 9 to fix the upper die core 3, and then the pad iron 7 is removed and the blank 8 is placed on the top of the lower die core 4 for forging. During the forging process, the upper die core 3 and the lower die core 4 are heated to 850°C to reduce the temperature difference between the upper die core 3 and the lower die core 4 and the blank 8, thereby avoiding tearing on the surface of the forging after forging and ensuring the forging quality.

[0050] Example 2

[0051] At the same time, in order to solve the above technical problems, the present invention also provides the following technical solutions: A method for using a forging composite die for producing a powder high-temperature alloy turbine disk specifically comprises the following steps:

[0052] S1, installing the lower mold core 4 inside the lower mold sleeve 6;

[0053] S2, insert the lower plug iron 5 into the lower slot 10 to fix the lower mold core 4 and the lower mold sleeve 6;

[0054] S3, placing the washer 7 flat on the top of the lower mold core 4;

[0055] S4, placing the upper mold core 3 flat on the top of the pad iron 7;

[0056] S5, installing the upper mold sleeve 1 on the outside of the upper mold core 3;

[0057] S6, insert the upper plug iron 2 into the upper slot 9 to fix the upper mold core 3 and the upper mold sleeve 1;

[0058] S7, remove the shim 7 and place the blank 8 on the top of the lower mold core 4.

[0059] In addition, it should be noted that the components not described in detail in this article are prior art.

[0060] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only several embodiments are described in detail in this disclosure, it should be easily understood by the personnel referring to this disclosure that many modifications are possible (for example, the size, scale, structure, shape and ratio of various elements, and parameter values ​​(for example, temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to specific embodiments, but extends to multiple modifications that still fall within the scope of the appended claims.

[0061] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0062] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

Claims

1. A forging composite die for producing a powder high-temperature alloy turbine disk, comprising an upper die sleeve (1), an upper die core (3), a lower die sleeve (6), a lower die core (4), a washer (7) and a blank (8); characterized in that: The upper mold core (3) is movably sleeved inside the upper mold sleeve (1), the lower mold core (4) is movably sleeved inside the lower mold sleeve (6), the pad iron (7) is placed between the upper mold core (3) and the lower mold core (4), an upper slot (9) is provided outside the upper mold core (3), an upper plug iron (2) is installed inside the upper slot (9), and the upper plug iron (2) is inserted between the upper mold core (3) and the upper mold sleeve (1), a lower slot (10) is provided outside the lower mold core (4), a lower plug iron (5) is installed inside the lower slot (10), and the lower plug iron (5) is inserted between the lower mold core (4) and the lower mold sleeve (6).

2. The forging composite die for producing a powder high temperature alloy turbine disk according to claim 1, characterized in that: The upper die sleeve (1) and the lower die sleeve (6) are both made of 5CrNiMo steel, and the temperatures of the upper die sleeve (1) and the lower die sleeve (6) are both 350°C.

3. The forging composite die for producing a powder high temperature alloy turbine disk according to claim 1, characterized in that: The upper mold core (3) and the lower mold core (4) are both made of GH4169 steel, and the upper mold core (3) and the lower mold core (4) are both 850°C.

4. The forging composite die for producing a powder high temperature alloy turbine disk according to claim 1, characterized in that: The blank (8) is made of GNPM01 steel, and the temperature of the blank (8) is 1120°C.

5. The forging composite die for producing powder high temperature alloy turbine disk according to claim 1, characterized in that: The washer (7) is made of 45# steel, and the temperature of the washer (7) is 1000°C.

6. The forging composite die for producing a powder high temperature alloy turbine disk according to claim 1, characterized in that: The upper die sleeve (1) and the upper die core (3) are matched in taper, and the lower die sleeve (6) and the lower die core (4) are matched in taper.

7. A method for using a forging composite die for producing a powder high-temperature alloy turbine disk, characterized in that: A forging composite die for producing a powder high-temperature alloy turbine disk according to any one of claims 1 to 6 is used to produce a high-temperature alloy turbine disk according to the following steps; S1, installing the lower mold core (4) inside the lower mold sleeve (6); S2, inserting the lower plug iron (5) into the lower slot (10) to fix the lower mold core (4) and the lower mold sleeve (6); S3, placing the washer (7) flat on the top of the lower mold core (4); S4, placing the upper mold core (3) flat on the top of the pad iron (7); S5, installing the upper mold sleeve (1) on the outside of the upper mold core (3); S6, inserting the upper plug iron (2) into the interior of the upper slot (9) to fix the upper mold core (3) and the upper mold sleeve (1); S7. Remove the shim (7) and place the blank (8) on the top of the lower die core (4) for forging.

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