Clamping device
By using nickel-based alloy material and graphite/ceramic material clamping devices, the internal gear is accurately clamped at a limit, which solves the problem of deformation of the internal gear in a vacuum nitriding furnace, and achieves a high-precision heat treatment effect.
Patent Information
- Application Number
- CN202422353546.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-26
AI Technical Summary
During the heat treatment of internal gears, especially in vacuum nitriding furnaces, internal gears are prone to deform due to improper clamping, and the prior art is difficult to effectively solve this problem.
The clamping device including a nickel-based alloy material is adopted to limit the end face of the internal gear by the first clamping assembly, the second clamping assembly and the locking assembly to ensure that the contact surface flatness is less than or equal to 0.01 mm, and a block of graphite or ceramic material is used to dissipate heat stress, and an annular or rectangular through-hole structure is designed to enhance heat dissipation and uniform stress distribution.
Effectively reduce or eliminate deformation of the internal gear during heat treatment, ensure processing accuracy and quality, and avoid deformation problems caused by thermal expansion or stress release of the clamping device.
Smart Images
Figure CN223061057U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of internal gear heat treatment processing technology, and particularly relates to a clamping device. Background Art
[0002] During the processing of internal gears, especially during the processing of internal gears, a heat treatment process is involved. In the conventional heat treatment process, it is necessary to reserve secondary processing allowances for the internal gears in advance so as to remove the deformed parts during the heat treatment process. In an improved process, the internal gears are directly machined to the target size, and at the same time, a vacuum nitriding furnace is used to heat-treat the internal gears. In order to reduce the deformation of the internal gears in the vacuum nitriding furnace, it is necessary to clamp and limit the internal gears. Summary of the Utility Model
[0003] The invention purpose of this application is to provide a clamping device for clamping an internal gear, thereby reducing or avoiding the deformation amount of the internal gear during heat treatment in a vacuum nitriding furnace device.
[0004] According to an embodiment of the present application, in a first aspect, a clamping device is provided for clamping and limiting an internal gear during heat treatment. The clamping device includes:
[0005] A first clamping component;
[0006] A second clamping component, the second clamping component is disposed opposite to the first clamping component, the internal gear is disposed between the second clamping component and the first clamping component, one end face of the internal gear faces the first clamping component, and the other end face of the internal gear faces the second clamping component;
[0007] A locking component connecting the first clamping component and the second clamping component;
[0008] The first clamping component, the second clamping component, and the locking component are made of nickel-based alloy material.
[0009] In one embodiment, the flatness of the surfaces of the first clamping component and the second clamping component that are respectively in contact with the internal gear is less than or equal to 0.01 mm.
[0010] In one embodiment, the first clamping component includes a first clamping plate and a first pressing block, the second clamping component includes a second clamping plate and a second pressing block, the internal gear is located between the first pressing block and the second pressing block, the first clamping plate is located above the first pressing block, the second clamping plate is located below the second pressing block, the locking component connects the first clamping plate and the second clamping plate, and the flatness of the sides of the first pressing block and the second pressing block facing the internal gear is less than or equal to 0.01 mm.
[0011] In one embodiment, the materials of the first pressing block and the second pressing block are both graphite or ceramic.
[0012] In one embodiment, both the first pressing block and the second pressing block are annular.
[0013] In one embodiment, the first pressing block and the second pressing block are rectangular, and through holes facing the internal gear are provided on both the first pressing block and the second pressing block.
[0014] In one embodiment, the first clamping plate includes a plurality of first clamping blocks arranged at intervals and a first connecting member, and the first connecting member connects the plurality of first clamping blocks; the second clamping plate includes a plurality of second clamping blocks arranged at intervals and a second connecting member, and the second connecting member connects the plurality of second clamping blocks.
[0015] In one embodiment, the locking assembly includes a concave member, a limiting member and a third connecting member. The opening direction of the concave member faces the limiting member. One end of the first clamping block and the second clamping block are located within the opening of the concave member. The limiting member is arranged at one end of the concave member, and the third connecting member connects and fixes the limiting member to one end of the concave member.
[0016] In one embodiment, the number of the first clamping blocks, the second clamping blocks and the locking assembly is the same; and / or, the first connecting member, the second connecting member and the third connecting member are all bolts.
[0017] In one embodiment, the materials of the first clamping plate, the second clamping plate and the locking assembly are all Fe25%-Ni15%-Cr alloy.
[0018] In the clamping device of the present application, the internal gear is clamped and limited by the first clamping assembly, the second clamping assembly and the locking assembly. The first clamping assembly and the second clamping assembly can limit the end face of the internal gear, thereby reducing or eliminating the deformation of the internal gear during heat treatment in the equipment of the vacuum nitriding furnace. At the same time, the first clamping assembly, the second clamping assembly and the locking assembly in the present application are made of nickel-based alloy material. By utilizing the high-temperature strength and oxidation resistance of the nickel-based alloy material, the deformation problem of the internal gear caused by the thermal expansion or stress release of the clamping device can be better avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic structural diagram of the clamping device in an embodiment of the present application;
[0020] Figure 2 is an exploded view of the clamping device in an embodiment of the present application;
[0021] Figure 3 Explosion schematic diagram of the clamping device in another embodiment of the present application;
[0022] Figure 4 Structural schematic diagram of the clamping device in another embodiment of the present application.
[0023] Explanation of the reference numerals in the drawings:
[0024] 100, the first clamping assembly; 110, the first clamping plate; 111, the first clamping block; 112, the first connecting member; 120, the first pressing block; 121, the through hole;
[0025] 200, the second clamping assembly; 210, the second clamping plate; 211, the second clamping block; 212, the second connecting member; 220, the second pressing block;
[0026] 300, the locking assembly; 310, the concave member; 320, the limiting member; 330, the third connecting member;
[0027] 400, the internal gear. Detailed implementation manners
[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.
[0029] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner.
[0030] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.
[0031] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0032] As described in the background, during the machining process of internal gears, especially during the machining of internal gears, a heat treatment process is involved. In a conventional heat treatment process, it is necessary to pre-reserve a secondary machining allowance for the internal gear to remove the deformed part during the heat treatment process. In an improved process, the internal gear is directly machined to the target size, and at the same time, a vacuum nitriding furnace is used to heat-treat the internal gear. In order to reduce the deformation of the internal gear in the vacuum nitriding furnace, it is necessary to clamp and limit the internal gear. To better solve this problem, the researchers in this application propose a clamping device for clamping the internal gear, thereby reducing or avoiding the deformation amount of the internal gear during heat treatment in the vacuum nitriding furnace equipment.
[0033] As Figure 1 shown, Figure 1 is a schematic structural diagram of the clamping device in an embodiment of the present application. In this embodiment, the clamping device includes a first clamping assembly 100, a second clamping assembly 200, and a locking assembly 300. The end faces of the internal gear 400 are pre-clamped and limited by the first clamping assembly 100, the second clamping assembly 200, and the locking assembly 300, thereby reducing or avoiding the deformation of the internal gear 400 during the heat treatment process. At the same time, in this embodiment, the first clamping assembly 100, the second clamping assembly 200, and the locking assembly 300 are made of nickel-based alloy material, so that the problem of deformation of the internal gear 400 caused by the thermal expansion or stress release of the clamping device can be better avoided.
[0034] Specifically, the second clamping assembly 200 is disposed opposite to the first clamping assembly 100, wherein the internal gear 400 is disposed between the second clamping assembly 200 and the first clamping assembly 100. One end face of the internal gear 400 faces the first clamping assembly 100, and the other end face of the internal gear 400 faces the second clamping assembly 200; the locking assembly 300 connects the first clamping assembly 100 and the second clamping assembly 200; the first clamping assembly 100, the second clamping assembly 200, and the locking assembly 300 are made of nickel-based alloy material.
[0035] In this embodiment, when the internal gear 400 is heat-treated in a vacuum nitriding furnace, especially during the processing of the internal gear 400, the end face of the internal gear 400 is clamped and limited by the first clamping assembly 100, the second clamping assembly 200 and the locking assembly 300 together, so as to reduce or avoid the deformation of the end of the internal gear 400 during the heat treatment process. At the same time, in order to reduce the influence of the deformation generated by the clamping device itself on the heat treatment of the internal gear 400, the first clamping assembly 100, the second clamping assembly 200 and the locking assembly 300 are all made of nickel-based alloy material. For example, the materials of the first clamping plate 110, the second clamping plate 210 and the locking assembly 300 are all iron 25%-nickel 15%-chromium alloy. By utilizing the high-temperature strength and oxidation resistance of the nickel-based alloy material, the deformation problem of the internal gear 400 caused by the thermal expansion or stress release of the clamping device can be better avoided.
[0036] In one embodiment, the flatness of the surfaces of the first clamping assembly 100 and the second clamping assembly 200 in contact with the internal gear 400 respectively is less than or equal to 0.01 mm.
[0037] In this embodiment, the flatness of the surfaces of the first clamping assembly 100 and the second clamping assembly 200 in contact with the internal gear 400 respectively is controlled to be less than or equal to 0.01 mm. Through this design requirement, the clamping accuracy can be improved, so that the contact surfaces of the first clamping assembly 100 and the second clamping assembly 200 with the end face of the internal gear 400 are more closely fitted, thereby effectively avoiding the deformation problem of the internal gear 400 caused by uneven contact or excessive local pressure. Especially during the heat treatment process, the internal gear 400 material is very sensitive to thermal expansion and contraction. The precise control of the flatness helps to disperse the thermal stress and reduce the deformation of the internal gear 400 caused by local stress concentration during heat treatment.
[0038] In one embodiment, refer to Figure 2 and Figure 3 As shown, the first clamping assembly 100 includes a first clamping plate 110 and a first pressing block 120, the second clamping assembly 200 includes a second clamping plate 210 and a second pressing block 220. The internal gear 400 is located between the first pressing block 120 and the second pressing block 220. The first clamping plate 110 is located above the first pressing block 120, the second clamping plate 210 is located below the second pressing block 220. The locking assembly 300 connects the first clamping plate 110 and the second clamping plate 210. The flatness of the surfaces of the first pressing block 120 and the second pressing block 220 facing the internal gear 400 is less than or equal to 0.01 mm.
[0039] In this embodiment, the first pressing block 120 and the second pressing block 220 with a flatness less than or equal to 0.01 mm are in contact with the end face of the internal gear 400, thereby ensuring the close contact between the first pressing block 120 and the second pressing block 220 and the end face of the internal gear 400. At the same time, through the action of the first clamping plate 110 and the second clamping plate 210, the clamping force of the locking assembly 300 is evenly transmitted to the first pressing block 120 and the second pressing block 220, thereby reducing the deformation problem of the internal gear 400 caused by uneven clamping during the heat treatment of the internal gear 400.
[0040] In one embodiment, the materials of the first pressing block 120 and the second pressing block 220 are both graphite or ceramic.
[0041] In this embodiment, the materials of the first pressing block 120 and the second pressing block 220 are both graphite or ceramic. Since graphite and ceramic materials have good high-temperature resistance and low thermal expansion coefficients, this enables them to effectively avoid deformation problems caused by thermal expansion of the materials during high-temperature heat treatment. Graphite materials have excellent self-lubricity, which can reduce friction and further reduce uneven stress generated during the clamping process. Ceramic materials, on the other hand, have extremely high hardness and wear resistance, which can ensure the stability of the surface shape during long-term clamping. By using these high-performance materials, the first pressing block 120 and the second pressing block 220 can not only maintain flatness in a high-temperature environment, but also effectively disperse and absorb stress concentration caused by heat treatment, reducing the additional stress on the internal gear 400, thereby further reducing the deformation risk of the internal gear 400 during heat treatment and ensuring the accuracy and quality of heat treatment.
[0042] In one embodiment, refer to Figure 2 As shown, the first pressing block 120 and the second pressing block 220 are annular.
[0043] In this embodiment, the first pressing block 120 and the second pressing block 220 adopt an annular design. The reason is that, on the one hand, the annular structure can reduce the weight of the first pressing block 120 and the second pressing block 220, and at the same time can more evenly distribute stress during the transmission of the clamping force, avoiding stress concentration; on the other hand, the annular structure has a hole-shaped structure in the middle, which can provide an additional heat dissipation channel during the heat treatment process, reducing the heat accumulation between the first pressing block 120 and the second pressing block 220 and the internal gear 400, thereby further reducing the deformation risk caused by thermal stress.
[0044] In another embodiment, refer to Figure 3 As shown, the first pressing block 120 and the second pressing block 220 are rectangular, and the first pressing block 120 and the second pressing block 220 are both provided with through holes 121 facing the internal gear 400.
[0045] In this embodiment, the first pressing block 120 and the second pressing block 220 are both rectangular, and are provided with through holes 121 facing the internal gear 400. The rectangular design provides a more stable clamping surface, which helps to evenly distribute the clamping force and reduce stress concentration. The design of providing through holes 121 can effectively enhance the heat dissipation capacity, especially during the heat treatment process, which helps to reduce the heat accumulation between the first pressing block 120 and the second pressing block 220 and the internal gear 400. Through these through holes 121, heat can be discharged more quickly, thereby reducing the risk of deformation caused by thermal stress, and further ensuring the accuracy and quality of the internal gear 400 during the heat treatment process.
[0046] In one embodiment, see Figure 2 and Figure 3 As shown, the first clamping plate 110 includes a plurality of first clamping blocks 111 and a first connecting member 112 that are spaced apart from each other, and the first connecting member 112 connects the plurality of first clamping blocks 111 ; the second clamping plate 210 includes a plurality of second clamping blocks 211 and a second connecting member 212 that are spaced apart from each other, and the second connecting member 212 connects the plurality of second clamping blocks 211 .
[0047] In this embodiment, the first clamping plate 110 is composed of a plurality of first clamping blocks 111 and a first connecting member 112 arranged at intervals, and the second clamping plate 210 is composed of a plurality of second clamping blocks 211 and a second connecting member 212 arranged at intervals. Through this design of a plurality of clamping blocks arranged at intervals, the clamping force can be dispersed and applied to different parts of the internal gear 400, which helps to evenly distribute stress, avoid local stress concentration, and reduce the risk of deformation of the internal gear 400 during heat treatment. Compared with an integral clamping plate, this block design can more flexibly adapt to different geometric shapes of the internal gear 400, and improve the adaptability and stability during the clamping process.
[0048] By connecting a plurality of first clamping blocks 111 through the first connecting member 112 and connecting a plurality of second clamping blocks 211 through the second connecting member 212, it is possible to ensure synchronous movement between the clamping blocks and maintain the stability of the overall clamping structure. In addition, the design of the first clamping block 111 and the second clamping block 211 arranged at intervals can provide more heat flow channels during the heat treatment process, which is helpful for heat dissipation, reduces the heat accumulation effect between the first pressing block 120 and the second pressing block 220 and the internal gear 400, and reduces deformation caused by thermal stress.
[0049] Further in one embodiment, see Figures 2 to 4As shown, the locking assembly 300 includes a concave member 310, a limiting member 320, and a third connecting member 330. The opening direction of the concave member 310 faces the limiting member 320. One end of the first clamping block 111 and the second clamping block 211 are located within the opening of the concave member 310. The limiting member 320 is disposed at one end of the concave member 310, and the third connecting member 330 connects and fixes the limiting member 320 to one end of the concave member 310.
[0050] In this embodiment, the concave member 310 accommodates the first clamping block 111 and the second clamping block 211 through its opening. It can be understood that the concave member 310 is in the shape of the letter "U". When both the first clamping block 111 and the second clamping block 211 are located inside the opening of the concave member 310, they are connected to the concave member 310 through the limiting member 320 and the third connecting member 330, thereby physically constraining the first clamping block 111 and the second clamping block 211 within the opening of the concave member 310. This enables the clamping device to maintain a stable clamping effect when subjected to high temperatures and mechanical stresses, reducing loosening and deformation of the workpiece.
[0051] In one embodiment, the number of the first clamping blocks 111 is the same as that of the second clamping blocks and the locking assembly 300; and / or, the first connecting member 112, the second connecting member 212, and the third connecting member 330 are all bolts.
[0052] In this embodiment, by ensuring that the number of the first clamping blocks 111, the second clamping blocks 211, and the locking assembly 300 is the same, it is possible to ensure that each first clamping block 111 and second clamping block 211 has a corresponding locking assembly 300 for cooperation. This symmetric and balanced structural design helps to evenly distribute the clamping force. During the heat treatment process, this balanced distribution of the clamping force can effectively avoid local stress concentration, reduce deformation and distortion of the workpiece, and further improve the accuracy and consistency of the internal gear 400 processing.
[0053] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0054] The above embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.
Claims
1. A clamping device for clamping and limiting an internal gear (400) during heat treatment, characterized in that, The clamping device includes: A first clamping component (100); A second clamping component (200), the second clamping component (200) is disposed opposite to the first clamping component (100), the internal gear (400) is disposed between the second clamping component (200) and the first clamping component (100), one end face of the internal gear (400) faces the first clamping component (100), and the other end face of the internal gear (400) faces the second clamping component (200); A locking component (300) connecting the first clamping component (100) and the second clamping component (200); The first clamping component (100), the second clamping component (200) and the locking component (300) are made of nickel-based alloy material.
2. The clamping device according to claim 1, characterized in that: The flatness of the surfaces of the first clamping component (100) and the second clamping component (200) in contact with the internal gear (400) is less than or equal to 0.01 mm.
3. The clamping device according to claim 1, characterized in that: The first clamping component (100) includes a first clamping plate (110) and a first pressing block (120), the second clamping component (200) includes a second clamping plate (210) and a second pressing block (220), the internal gear (400) is located between the first pressing block (120) and the second pressing block (220), the first clamping plate (110) is located above the first pressing block (120), the second clamping plate (210) is located below the second pressing block (220), the locking component (300) connects the first clamping plate (110) and the second clamping plate (210), and the flatness of the sides of the first pressing block (120) and the second pressing block (220) facing the internal gear (400) is less than or equal to 0.01 mm.
4. The clamping device according to claim 3, wherein: The materials of the first pressing block (120) and the second pressing block (220) are both graphite or ceramic.
5. The clamping device according to claim 3, characterized in that: The first pressing block (120) and the second pressing block (220) are both annular.
6. The clamping device according to claim 3, wherein: The first pressing block (120) and the second pressing block (220) are rectangular, and the first pressing block (120) and the second pressing block (220) are both provided with through holes (121) facing the internal gear (400).
7. The clamping device according to claim 3, characterized in that: The first clamping plate (110) includes a plurality of first clamping blocks (111) arranged at intervals and a first connecting member (112), and the first connecting member (112) connects the plurality of first clamping blocks (111); the second clamping plate (210) includes a plurality of second clamping blocks (211) arranged at intervals and a second connecting member (212), and the second connecting member (212) connects the plurality of second clamping blocks (211).
8. The clamping device according to claim 7, characterized in that: The locking assembly (300) includes a concave member (310), a limiting member (320), and a third connecting member (330). The opening direction of the concave member (310) faces the limiting member (320). One end of the first clamping block (111) and the second clamping block (211) are located within the opening of the concave member (310). The limiting member (320) is disposed at one end of the concave member (310), and the third connecting member (330) connects and fixes the limiting member (320) to one end of the concave member (310).
9. The clamping device according to claim 8, characterized in that: The number of the first clamping blocks (111) is the same as that of the second clamping blocks and the locking assembly (300); and / or, the first connecting member (112), the second connecting member (212), and the third connecting member (330) are all bolts.
10. The clamping device according to claim 8, characterized in that: The materials of the first clamping plate (110), the second clamping plate (210), and the locking assembly (300) are all iron 25%-nickel 15%-chromium alloy.