Tool for heat treatment of annular forgings
By setting a plurality of first support members and a movable second support member on the workpiece for heat treatment of annular forgings, combined with hollow and hollow steel rod designs, the problems of uneven heat treatment and deformation of large annular forgings in high temperature and high pressure environments are solved. Improves hardness quality and workpiece stability.
Patent Information
- Application Number
- CN202411175994.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-01-10
AI Technical Summary
In high temperature and high pressure environments, large annular forgings are prone to uneven heat and deformation during traditional heat treatment, resulting in insufficient hardness and inability to meet the design requirements, resulting in scrapping of workpieces.
A workpiece for heat treatment of annular forging is designed, including a pallet, a spreader and a support assembly. A plurality of first support members are arranged in the circumferential direction on the pallet, a second support member is arranged at intervals, and the annular forging is movably supported by the second support member. The bottom wall reduces the influence of gravity and improves cooling efficiency through hollow structure and hollow steel rods.
It effectively reduces the deformation of ring forgings during heat treatment, improves hardness and quality, ensures that the workpiece meets design requirements, and extends the service life of the workpiece.
Smart Images
Figure CN119287142A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of heat treatment technology, and in particular to a tooling for heat treatment of annular forgings. Background Art
[0002] Ring forgings are commonly used parts in mechanical equipment. At present, some special mechanical equipment has high requirements for the hardness of ring forgings because their working scenes are in high temperature and high pressure environments. Ring forgings need to be heat treated after rough machining so that the hardness of the ring forgings after fine machining meets the design requirements. In the traditional heat treatment process, the ring forgings are placed in a heat treatment frame, but for some large ring forgings, it will cause uneven heating of the forgings, and due to the effect of gravity, the forgings will be severely deformed after heat treatment, resulting in insufficient allowance during fine machining, and the hardness does not meet the design requirements, resulting in the scrapping of the workpiece and causing losses. Summary of the invention
[0003] Based on the above description, the present application provides a tooling for heat treatment of annular forgings to solve the problem of deformation occurring during the heat treatment of annular forgings.
[0004] The technical solution of this application to solve the above technical problems is as follows:
[0005] A tool for heat treatment of annular forgings, comprising:
[0006] A tray having an annular bearing surface, wherein the bearing surface is used to bear the annular forging;
[0007] a sling connected to the pallet;
[0008] A support assembly, comprising a plurality of first support members and at least one second support member, wherein the plurality of first support members are arranged on the bearing surface at intervals along the circumference of the bearing surface; the first support member and the second support member are both used to support the annular forging;
[0009] Wherein, the second support member is movably arranged on the bearing surface, and the second support member is used to be placed in the interval space between the annular forging and the bearing surface.
[0010] In one or more embodiments, each of the second support members is detachably disposed in a spacing space between the annular forging and the bearing surface, and is located between two adjacent first support members, and there is a gap between the adjacent second support members and the first support members.
[0011] In one or more embodiments, the plurality of first support members are fixed on the bearing surface at uniform intervals along the circumference of the bearing surface, and at most one second support member is arranged between two adjacent first support members.
[0012] In one or more embodiments, the height of the second support member along the first direction is greater than or equal to the height of the first support member along the first direction, and the height of the second support member along the first direction tends to increase along the direction toward the inner side of the bearing surface; the first direction is parallel to the axial direction of the bearing surface.
[0013] In one or more embodiments, a height of the second support member along the first direction is 10 mm to 25 mm.
[0014] In one or more embodiments, the first support member is configured as a steel bar; and / or
[0015] The second supporting member is configured as an inclined iron block.
[0016] In one or more embodiments, the sling includes a lifting ring, a connecting ring and a plurality of connecting rods; the lifting ring is arranged on one side of the connecting ring, and the plurality of connecting rods are arranged at intervals on the other side of the connecting ring; one end of the connecting rod away from the connecting ring is connected to the pallet and is arranged close to the inner side of the load-bearing surface.
[0017] In one or more embodiments, the connecting rod is configured as a hollow steel rod, and the connecting rod is provided with a first through hole arranged close to the connecting ring and a second through hole arranged close to the tray.
[0018] In one or more embodiments, the radial lengths of each of the first support members along the bearing surface are the same or different.
[0019] In one or more embodiments, a portion of the tray close to the inner side of the carrying surface is hollowed out.
[0020] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0021] In this embodiment, a plurality of first support members are arranged at intervals along the circumferential direction on the bearing surface of the tray, and the annular forging is supported by the plurality of first support members. Between two adjacent first support members, there may be a spacing space between the annular forging and the bearing surface, and the spacing space can facilitate the smooth flow of coolant during quenching. At least one second support member is movably placed in the spacing space between the annular forging and the bearing surface to partially support the bottom wall of the annular forging, thereby reducing the situation in which the bottom wall of the annular forging is partially affected by gravity and thus undergoing large deformation during heat treatment, thereby improving the quality of the annular forging. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of the overall structure of a tooling for heat treatment of annular forgings provided in an embodiment of the present application;
[0023] Figure 2 for Figure 1 Schematic diagram of the structure from one perspective of the tooling for heat treatment of ring forgings.
[0024] Description of reference numerals:
[0025] Tray 10, bearing surface 10a;
[0026] Lifting device 20, lifting ring 21, connecting ring 22, connecting rod 23, first through hole 23a, second through hole 23b;
[0027] Support assembly 30, first support member 31, second support member 32;
[0028] First direction F1. DETAILED DESCRIPTION
[0029] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0031] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.
[0032] See also Figure 1 , Figure 1A schematic structural diagram of a tool for heat treatment of annular forgings provided in an embodiment of the present application is shown. The tool for heat treatment of annular forgings provided in an embodiment of the present application comprises a pallet 10, a hanger 20 and a support assembly 30; the pallet 10 has an annular bearing surface 10a, and the bearing surface 10a is used to bear annular forgings (not shown in the figure); the hanger 20 is connected to the pallet 10; the support assembly 30 comprises a plurality of first support members 31 and at least one second support member 32, and the plurality of first support members 31 are arranged on the bearing surface 10a at intervals along the circumference of the bearing surface 10a; the first support members 31 and the second support members 32 are both used to support the annular forgings; wherein the second support member 32 is movably arranged on the bearing surface 10a, and the second support member 32 is used to be placed in the interval space between the annular forging and the bearing surface 10a.
[0033] It should be noted that, in this embodiment, the annular forging is applied to a solid rocket engine, and in other embodiments, the annular forging can also be applied to other mechanical equipment. The shape of the annular forging can be an annular ring or an annular barrel.
[0034] Specifically, the outer contour of the tray 10 is circular, and the diameter of the tray 10 is slightly larger than the diameter of the annular forging. The upper surface of the tray 10 close to the outer periphery is the bearing surface 10a, and the bearing surface 10a is annular and used to bear the annular forging. When the annular forging is carried on the bearing surface 10a, the axial direction of the annular forging is parallel to the axial direction of the bearing surface 10a (that is, the first direction F1). The hanger 20 is fixed on the tray 10, and the hanger 20 is arranged close to the inner side of the bearing surface 10a and extends upward.
[0035] The support assembly 30 includes a plurality of first support members 31 and at least one second support member 32. The number of the first support members 31 can be reasonably set according to the size of the bearing surface 10a, and the number of the second support members 32 can be determined according to the height and number of the spacing spaces between the annular forging and the bearing surface 10a, wherein the height of the spacing space refers to the spacing distance between two adjacent first support members 31, the annular forging and the bearing surface 10a along the first direction F1. The first direction F1 can be regarded as a vertical direction. In addition, all components of the tooling of this embodiment are made of metal structural steel Q235, which is cheap and easy to manufacture.
[0036] In this embodiment, the first support member 31 is welded to the bearing surface 10a of the tray 10 and is distributed at intervals on the bearing surface 10a along the circumferential direction. The annular forging is supported by multiple first support members 31. Between each two adjacent first support members 31, there may be an interval space between the annular forging and the bearing surface 10a, and the height of each interval space may be the same or different. In this way, during the quenching process, the coolant can flow in the interval space under the annular forging, which facilitates the smooth discharge of the coolant. Further, at least one second support member 32 is movably inserted into the interval space between the annular forging and the bearing surface 10a, and the at least one second support member 32 is located between two adjacent first support members 31. In this way, the bottom wall of the annular forging at the interval is supported by the second support member 32, which can reduce the situation where the annular forging is locally affected by gravity during the heat treatment and undergoes large deformation. It should be noted that the heat treatment in this embodiment adopts tempering treatment.
[0037] In this embodiment, a plurality of first support members 31 are arranged at intervals along the circumferential direction on the bearing surface 10a of the tray 10, and the annular forging is supported by the plurality of first support members 31. Between two adjacent first support members 31, there may be a spacing space between the annular forging and the bearing surface 10a, and the spacing space can facilitate the smooth flow of coolant during quenching. At least one second support member 32 is movably placed in the spacing space between the annular forging and the bearing surface 10a to partially support the bottom wall of the annular forging, thereby reducing the situation in which the bottom wall of the annular forging is partially affected by gravity and thus undergoing large deformation during heat treatment, thereby improving the quality of the annular forging.
[0038] Continue reading Figure 1 and Figure 2 In some embodiments, each second support member 32 is used to be detachably disposed in a spacing space between the annular forging and the bearing surface 10a, and is located between two adjacent first support members 31, and there is a gap between the adjacent second support members 32 and the first support members 31. Specifically, the second support member 32 is a detachable independent component. According to the height of the spacing space, the second support member 32 can be flexibly selected to be inserted into the spacing space and is located between two adjacent first support members 31. It should be noted that there may be no second support member 32 between any two adjacent first support members 31, or one second support member 32 may be provided, or two second support members 32 may be provided, which can be specifically provided according to actual conditions. Furthermore, there is a gap between the adjacent second support members 32 and the first support members 31, so that the coolant can flow in and out smoothly during the quenching process, thereby improving the cooling effect on the annular forging.
[0039] Continue reading Figure 1In some embodiments, a plurality of first support members 31 are fixed on the bearing surface 10a at uniform intervals along the circumference of the bearing surface 10a, and at most one second support member 32 is arranged between two adjacent first support members 31. Specifically, the interval between the two first support members 31 can be reasonably set according to the circumferential size of the bearing surface 10a and the size of the first support member 31, and one second support member 32 can be roughly accommodated in one interval. In this way, by fixing a plurality of first support members 31 on the bearing surface 10a at uniform intervals along the circumference of the bearing surface 10a, and accommodating at most one second support member 32 in each interval, the uniformity of the support for the annular forging can be improved, and the second support member 32 can be conveniently placed.
[0040] In some embodiments, the height of the second support member 32 along the first direction F1 is greater than or equal to the height of the first support member 31 along the first direction F1, and the height of the second support member 32 along the first direction F1 tends to increase along the direction toward the inner side of the bearing surface 10a; the first direction F1 is parallel to the axial direction of the bearing surface 10a.
[0041] Specifically, by setting the height of the second support member 32 along the first direction F1 to be greater than or equal to the height of the first support member 31 along the first direction F1, a second support member 32 can be inserted between any two adjacent first support members 31 when the height of the spacing space between the annular forging and the bearing surface 10a is greater than or equal to the height of the first support member 31. Further, the height of the second support member 32 along the first direction F1 can be gradually increased along the direction toward the inner side of the bearing surface 10a, or gradually increased and then remained unchanged. It should be noted that after the annular forging is placed on the bearing surface 10a and supported by multiple first support members 31, the second support member 32 can be inserted into the corresponding spacing space from the inner side of the annular forging, and the height of the second support member 32 along the first direction F1 gradually increases and then remains unchanged along the direction toward the inner side of the bearing surface 10a. In this way, the insertion depth of the second support member 32 can be flexibly adjusted until the second support member 32 abuts against the bottom wall of the annular forging to partially support the bottom wall of the annular forging, and the second support member 32 is not easy to fall off.
[0042] Continue reading Figure 1In some embodiments, the height of the second support member 32 along the first direction F1 is 10 mm to 25 mm. Specifically, in the present embodiment, the height of the first support member 31 can be set to 10 mm, the lowest end height of the second support member 32 is 10 mm, and the highest end height is 25 mm. In other embodiments, the height of the first support member 31 can be set to 11 mm, the lowest end height of the second support member 32 is 11 mm, and the highest end height is 24 mm or 25 mm, etc. In this way, the height of the first support member 31 and the height of the second support member 32 can be flexibly set, and for the case where the surface fluctuation of the bottom wall of the annular forging varies between 1 mm and 15 mm, the second support member 32 can be inserted for support, thereby reducing the situation where the bottom wall of the annular forging is locally affected by gravity during heat treatment and undergoes large deformation.
[0043] Continue reading Figure 1 In some embodiments, the first support member 31 is configured as a steel bar. Furthermore, the second support member 32 is configured as an oblique iron block. Specifically, in the embodiment of the present application, the first support member 31 is a steel bar, and the diameter of the steel bar is 10 mm, that is, the height of the first support member 31 is 10 mm. Thus, by configuring the first support member 31 as a steel bar, a line-surface contact method is adopted between the first support member 31 and the annular forging, thereby reducing the deformation effect of the first support member 31 on the annular forging. Furthermore, by configuring the second support member 32 as an oblique iron block, the lowest end height of the oblique iron block can be 10 mm, and the highest end height can be 25 mm. Thus, by configuring the second support member 32 as an oblique iron block, the insertion depth of the second support member 32 can be flexibly adjusted, and the second support member 32 is also easy to process and manufacture.
[0044] Continue reading Figure 1 In some embodiments, the sling 20 includes a lifting ring 21, a connecting ring 22 and a plurality of connecting rods 23; the lifting ring 21 is arranged on one side of the connecting ring 22, and the plurality of connecting rods 23 are arranged at intervals on the other side of the connecting ring 22, and one end of the connecting rod 23 away from the connecting ring 22 is connected to the pallet 10 and is arranged close to the inner side of the load-bearing surface 10a.
[0045] Specifically, in the present embodiment, the shape of the lifting ring 21 is a semicircular ring, and the lifting ring 21 is designed to be a smooth transition curve. There is no risk of stress concentration during the quenching process, and the cross-sectional size is large enough to meet the requirements for lifting the ring forgings and tooling. The connecting ring 22 is in the shape of a full circle ring, which serves to connect the lifting ring 21 and the connecting rod 23. The lifting ring 21 is welded to the horizontal surface of the connecting ring 22, and a plurality of connecting rods 23 are welded to the surface of the connecting ring 22 on the side away from the lifting ring 21. Each connecting rod 23 extends toward the bearing surface 10a and is arranged close to the inner side of the bearing surface 10a, and is welded to the bearing surface 10a of the pallet 10. In this way, the lifting device 20 is composed of the lifting ring 21, the connecting ring 22 and the plurality of connecting rods 23, and the structure is stable and the bearing capacity is strong. The ring forging can be lifted and transported in each link of the heat treatment process through the lifting mechanism and the lifting device 20 to smoothly complete the heat treatment process. In addition, each connecting rod 23 is welded on the bearing surface 10a of the tray 10 and close to the inner side of the annular bearing surface 10a. The approximate position of the annular forging can be restricted by each connecting rod 23. In this way, during the heat treatment process, the annular forging can be prevented from moving significantly and causing accidents.
[0046] Continue reading Figure 1 In some embodiments, the connecting rod 23 is configured as a hollow steel rod, and the connecting rod 23 is provided with a first through hole 23a disposed near the connecting ring 22 and a second through hole 23b disposed near the tray 10. Specifically, by configuring the connecting rod 23 as a hollow steel rod, the weight of the tooling can be reduced. Further, by providing a first through hole 23a on the side of the connecting rod 23 close to the connecting ring 22, and providing a second through hole 23b on the side of the connecting rod 23 close to the tray 10, the first through hole 23a and the second through hole 23b can be located on one side or on different sides. In this way, during the heating process of the heat treatment, the pressure inside the connecting rod 23 increases, and decompression can be achieved through the first through hole 23a and the second through hole 23b, so as to avoid the air in the connecting rod 23 from expanding and exploding due to heat, and during the quenching process, the coolant will be poured into the connecting rod 23 through the first through hole 23a and the second through hole 23b, and by providing the first through hole 23a and the second through hole 23b at the upper and lower positions of the connecting rod 23, respectively, the coolant can be discharged smoothly.
[0047] In some embodiments, the radial lengths of each first support member 31 along the bearing surface 10a are set to be the same or different. Specifically, in the present embodiment, each connecting rod 23 is welded to the bearing surface 10a of the pallet 10 and close to the inner side of the annular bearing surface 10a. At a position close to the welding point of the connecting rod 23, the length of the first support member 31 set on the bearing surface 10a is shorter, and at a position away from the welding point of the connecting rod 23, the length of the first support member 31 set on the bearing surface 10a is longer. In the present embodiment, the first support member 31 is configured as a steel bar. In this way, by setting the lengths of each first support member 31 to be the same or different, steel bars of different lengths can be flexibly welded according to the position of the connecting rod 23 on the bearing surface 10a, so that a plurality of steel bars are evenly arranged circumferentially spaced on the bearing surface 10a.
[0048] In some embodiments, the inner portion of the tray 10 near the bearing surface 10a is hollowed out. Specifically, in this embodiment, the tray 10 is cut by laser, has a beautiful arc, and has no risk of stress concentration after quenching. The inner portion of the tray 10 near the bearing surface 10a is cut off, which can reduce the weight of the tooling and the lifting load.
[0049] In summary, the tooling for heat treatment of annular forgings of the embodiment of the present application is provided with a tray 10 and a sling 20, the tray 10 is used to carry the annular forgings, and the sling 20 is used to lift the annular forgings in various links of the heat treatment process. A plurality of first support members 31 are arranged circumferentially on the bearing surface 10a of the tray 10, and the annular forgings are supported by a plurality of first support members 31. Between two adjacent first support members 31, there may be a spacing space between the annular forging and the bearing surface 10a, and the spacing space can facilitate the smooth flow of coolant during quenching; at least one second support member 32 is movably placed in the spacing space between the annular forging and the bearing surface 10a to partially support the bottom wall of the annular forging, thereby reducing the situation where the bottom wall of the annular forging is partially affected by gravity and undergoes large deformation during the heat treatment process, thereby improving the quality of the annular forgings. In addition, by configuring the first support member 31 as a steel bar, it can not only support the annular forging but also is easy to manufacture. By configuring the second support member 32 as an inclined iron block, the insertion depth of the second support member 32 into the spacing space can be flexibly adjusted according to the undulating surface of the bottom wall of the annular forging, so as to locally support the bottom wall of the annular forging and reduce the possibility of deformation. At the same time, the inclined iron block is easy to manufacture and the insertion operation is convenient.
[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A tool for heat treatment of annular forgings, characterized in that: include: A tray having an annular bearing surface, wherein the bearing surface is used to bear the annular forging; a sling connected to the pallet; and A support assembly, comprising a plurality of first support members and at least one second support member, wherein the plurality of first support members are arranged on the bearing surface at intervals along the circumference of the bearing surface; the first support member and the second support member are both used to support the annular forging; Wherein, the second support member is movably arranged on the bearing surface, and the second support member is used to be placed in the interval space between the annular forging and the bearing surface.
2. The tooling for heat treatment of annular forgings according to claim 1, characterized in that: Each of the second support members is used to be detachably disposed in a spacing space between the annular forging and the bearing surface, and is located between two adjacent first support members, and there is a gap between the adjacent second support members and the first support members.
3. The tooling for heat treatment of annular forgings according to claim 1, characterized in that: The plurality of first support members are fixed on the bearing surface at uniform intervals along the circumference of the bearing surface, and at most one second support member is arranged between two adjacent first support members.
4. The tooling for heat treatment of annular forgings according to claim 1, characterized in that: The height of the second support member along the first direction is greater than or equal to the height of the first support member along the first direction, and the height of the second support member along the first direction tends to increase along the direction toward the inner side of the bearing surface; the first direction is parallel to the axial direction of the bearing surface.
5. The tooling for heat treatment of annular forgings according to claim 4, characterized in that: The height of the second support member along the first direction is 10 mm to 25 mm.
6. The tooling for heat treatment of annular forgings according to any one of claims 1 to 5, characterized in that: The first support member is configured as a steel bar; and / or The second support member is configured as an inclined iron block.
7. The tooling for heat treatment of annular forgings according to any one of claims 1 to 5, characterized in that: The sling includes a lifting ring, a connecting ring and a plurality of connecting rods; the lifting ring is arranged on one side of the connecting ring, the plurality of connecting rods are arranged at intervals on the other side of the connecting ring, one end of the connecting rod away from the connecting ring is connected to the pallet and is arranged close to the inner side of the bearing surface.
8. The tooling for heat treatment of annular forgings according to claim 7, characterized in that: The connecting rod is configured as a hollow steel rod, and the connecting rod is provided with a first through hole arranged close to the connecting ring and a second through hole arranged close to the tray.
9. The tooling for heat treatment of annular forgings according to any one of claims 1 to 5, characterized in that: The radial lengths of the first supporting members along the bearing surface are the same or different.
10. The tooling for heat treatment of annular forgings according to any one of claims 1 to 5, characterized in that: The inner portion of the tray close to the carrying surface is hollowed out.