Gear forging blank heat treatment support tool

Abstract

The utility model belongs to gear forging blank technical field, concretely relates to a kind of supporting tool for gear forging blank heat treatment, including several support disc, several limit rods and several limit rings, wherein every two support disc can be stacked, and multiple groups of support structures are arranged on the support disc in array;Each group of support structures includes several support protrusions, the support protrusions are arranged on the support disc in multiple groups of concentric circle mode, for adapting the gear forging blank of different outer diameter specifications;Several limit rods are installed at the center of each group of support structures on the support disc, and several limit rings are installed at the bottom of each support disc, concentrically arranged with limit rod, and the inner diameter of limit ring matches with the outer diameter of limit rod.

Description

Technical Field

[0001] This utility model belongs to the field of gear forging technology, and more specifically, it relates to a support fixture for heat treatment of gear forgings. Background Technology

[0002] During the heat treatment or high-temperature transfer of gear forging blanks, the material is in a softened state at high temperature. If there is no effective support structure, the hub part is prone to collapse and the tooth area is deformed due to its own weight or external disturbances, which will affect the subsequent machining accuracy and product performance.

[0003] Traditional support methods often employ flat plate stacking or simple brackets, which suffer from problems such as fixed support points, poor adaptability, and insufficient stability. They are unable to meet the load-bearing requirements of forgings with different outer diameters and are prone to structural deformation or oxidation failure in high-temperature environments. Furthermore, existing tooling lacks reliable positioning and limiting mechanisms when used in stacks, which can easily lead to risks such as misalignment between upper and lower layers and overturning of forgings, potentially causing safety accidents.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a support tooling for heat treatment of gear forging blanks, in order to achieve a more practical purpose. Utility Model Content

[0005] In view of the problems mentioned in the background art above, this utility model provides a support fixture for heat treatment of gear forging blanks.

[0006] The technical solution adopted by this utility model is as follows: A support fixture for heat treatment of gear forging blanks includes several support discs, several limiting rods, and several limiting rings, wherein every two support discs can be stacked, and multiple sets of support structures are arrayed on the support discs; each set of support structures includes several supporting protrusions, which are arranged on the support discs in multiple concentric circumferential arrangements to adapt to gear forging blanks with different outer diameters; several limiting rods are installed at the center of each set of support structures on the support discs, and several limiting rings are installed at the bottom of each support disc, concentrically arranged with the limiting rods, and the inner diameter of the limiting rings matches the outer diameter of the limiting rods.

[0007] Furthermore, every three of the support protrusions arranged in a concentric circle form a group to jointly support the lower end face of the hub of a gear forging blank.

[0008] Furthermore, it also includes a base, with uprights vertically arranged at two corners of the base, and each of the support plates has a positioning hole that matches the upright, for fitting onto the upright.

[0009] Furthermore, the support plate is made of heat-resistant alloy steel, and the support plate, support protrusion, limiting rod and limiting ring are integrally formed.

[0010] Furthermore, the base is provided with mounting holes that match the outer diameter of the limiting ring.

[0011] Furthermore, the base is equipped with self-locking casters at its bottom.

[0012] The beneficial effects of this utility model are:

[0013] The limiting rod and limiting ring form a nested positioning pair between the upper and lower support plates. When the upper support plate is stacked on top of the lower one, its bottom limiting ring fits into the lower limiting rod, achieving axial alignment and rotational constraint in the horizontal plane. Multiple sets of concentrically arranged support protrusions cover the common outer diameter range of gear forging blank hubs, ensuring that forging blanks of different specifications can find matching support circumferences. Thus, without changing tooling, precise alignment during multi-layer stacking is achieved, while also meeting the universal support requirements for multiple forging blank models. This effectively avoids interlayer misalignment and forging blank displacement caused by thermal expansion or vibration during high-temperature stacking, thereby ensuring the stability of the forging blank's geometric shape during heat treatment.

[0014] Specifically, the support plate structure of the overall tooling is suitable for high-temperature heating and heat preservation scenarios. It can be directly placed into the heat treatment furnace for heating because its support protrusion is in point contact with a small area and there is sufficient vertical spacing between the forging billets, so that radiation and convection in the furnace can still effectively penetrate between layers.

[0015] Secondly, when used with a base, it can be transferred in a hot state, making it convenient to transfer before quenching; and it can also support the overall load-bearing capacity for slow-cooling heat treatments such as annealing and normalizing. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of multiple support disks stacked according to the present invention;

[0018] Figure 2 This is a bottom view of the support plate of this utility model;

[0019] Figure 3 This is a schematic diagram of the support plate and base of this utility model;

[0020] Figure 4 This is a schematic diagram showing the connection between multiple support plates and the base of this utility model;

[0021] The attached diagram is labeled as follows:

[0022] Support plate 1, limit rod 11, limit ring 12, support protrusion 13, positioning hole 14, base 2, column 21, mounting hole 22, self-locking caster wheel 23. Detailed Implementation

[0023] like Figures 1-4 As shown, a support fixture for heat treatment of gear forging blanks includes several support disks 1, several limiting rods 11, and several limiting rings 12. Each pair of support disks 1 can be stacked. Multiple sets of support structures are arrayed on the support disks 1. Each set of support structures includes several support protrusions 13, which are arranged in multiple concentric circles on the support disks 1 to accommodate gear forging blanks with different outer diameters. Several limiting rods 11 are installed at the center of each set of support structures on the support disks 1, and several limiting rings 12 are installed at the bottom of each support disk 1, concentrically arranged with the limiting rods 11, and the inner diameter of the limiting rings 12 matches the outer diameter of the limiting rods 11.

[0024] Using the above technical solution, the limiting rod 11 and the limiting ring 12 form a nested positioning pair between the upper and lower support plates 1. When the upper support plate 1 is stacked on the lower layer, its bottom limiting ring 12 fits into the lower limiting rod 11, achieving axial alignment and rotational constraint in the horizontal plane. Meanwhile, multiple sets of concentrically arranged support protrusions 13 cover the common outer diameter range of gear forging blank hubs, ensuring that forging blanks of different specifications can find matching support circumferences. Thus, without changing tooling, precise alignment during multi-layer stacking is achieved, and the universal support requirements for multiple forging blank models are met. This effectively avoids interlayer misalignment and forging blank displacement caused by thermal expansion or vibration during high-temperature stacking, thereby ensuring the stability of the forging blank's geometric shape during heat treatment.

[0025] Specifically, the support plate 1 structure of the overall tooling is suitable for high-temperature heating and heat preservation scenarios. It can be directly placed into the heat treatment furnace for heating because its support protrusion 13 is in point contact with a small area and there is sufficient vertical spacing between the forging billets, so that radiation and convection in the furnace can still effectively penetrate between layers.

[0026] Secondly, in conjunction with base 2, it can achieve hot transfer, which is convenient for transfer before quenching; and it can also support the overall load of slow-cooling heat treatments such as annealing and normalizing.

[0027] As a preferred embodiment, the support protrusions 13 arranged in concentric circles form a group of three to jointly support the lower end face of the hub of a gear forging blank. This three-point support not only provides stable balance but also tolerates minor manufacturing errors or differences in thermal deformation, preventing the forging blank from warping or deflecting around its axis.

[0028] As a preferred embodiment, the system also includes a base 2, with uprights 21 vertically arranged at both corners. Each support plate 1 has a positioning hole 14 that matches the upright 21 for fitting onto the upright 21. The upright 21, as a guiding element, cooperates with the positioning hole 14 of the support plate 1 to form a vertical constraint channel, limiting the horizontal displacement and overturning tendency of the support plate 1 during the stacking process, facilitating integrated transport with the base 2.

[0029] As a preferred embodiment, the support plate 1 is made of heat-resistant alloy steel, and the support plate 1, support protrusion 13, limiting rod 11, and limiting ring 12 are integrally formed. This extends the service life and reduces maintenance costs.

[0030] As a preferred embodiment, the base 2 is provided with mounting holes 22 that match the outer diameter of the limiting ring 12. This improves the torsional and lateral displacement resistance of the bottom support plate 1, preventing the bottom plate from rotating or sliding when loading forgings or moving tooling, thereby laying a stable foundation for the entire stacking system.

[0031] As a preferred embodiment, the base 2 is equipped with self-locking casters 23 at its bottom. During the transfer process before and after heat treatment, the casters can flexibly adjust the position of the tooling to adapt to the spatial layout of the furnace inlet, cooling zone, or hoisting station.

[0032] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A support fixture for heat treatment of gear forgings, characterized in that: include A plurality of support disks (1) are provided, and two support disks (1) can be stacked. Multiple sets of support structures are arrayed on the support disks (1). Each set of support structures includes a plurality of support protrusions (13). The support protrusions (13) are arranged on the support disks (1) in a concentric circumferential manner to adapt to gear forging blanks with different outer diameter specifications. A plurality of limiting rods (11) are installed at the center of each set of support structures on the support plate (1); A plurality of limiting rings (12) are installed at the bottom of each of the support plates (1), and are concentrically arranged with the limiting rod (11), and the inner diameter of the limiting ring (12) matches the outer diameter of the limiting rod (11).

2. The support fixture for heat treatment of gear forgings according to claim 1, characterized in that: The three support protrusions (13) arranged in a concentric circle form a group to jointly support the lower end face of the hub of a gear forging blank.

3. A support fixture for heat treatment of gear forgings according to claim 1 or 2, characterized in that: It also includes a base (2), on which two columns (21) are vertically arranged at the two corners. Each of the support plates (1) is provided with a positioning hole (14) that matches the column (21) for fitting onto the column (21).

4. The support fixture for heat treatment of gear forgings according to claim 2, characterized in that: The support plate (1) is made of heat-resistant alloy steel, and the support plate (1), support protrusion (13), limiting rod (11) and limiting ring (12) are integrally formed structures.

5. The support fixture for heat treatment of gear forgings according to claim 3, characterized in that: The base (2) is provided with mounting holes (22) that match the outer diameter of the limiting ring (12).

6. The support fixture for heat treatment of gear forgings according to claim 3, characterized in that: The base (2) is equipped with self-locking casters (23) at its bottom.

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