Annealing heat treatment device for shaft forgings

Abstract

This utility model relates to the technical field of metal heat treatment equipment, and discloses an annealing heat treatment device for shaft forgings, including an annealing heat treatment group and a pull-out mechanism and a support mechanism disposed within the group; the pull-out mechanism includes a storage plate placed on a roller and equipped with a limiting guide and anti-drop structure; the support mechanism is located above the pull-out mechanism and includes multiple adjustable-spaced support rods and a storage rack. This utility model, through its lower-layer pull-out and upper-layer support structure, achieves safe and convenient loading and unloading of workpieces outside the furnace, reducing labor intensity; simultaneously, this double-layer structure effectively improves the utilization rate of furnace space and production efficiency, and the adjustable-spaced support rods can provide stable support for workpieces of different lengths, preventing high-temperature deformation, ensuring product quality, and demonstrating strong applicability.

Description

Technical Field

[0001] This utility model relates to the field of metal heat treatment equipment technology, and in particular to an annealing heat treatment device for shaft forgings. Background Technology

[0002] Shaft forgings, as key basic components in mechanical equipment, generate significant structural and residual stresses after forging. To eliminate these stresses, improve the material's machinability, and prepare for subsequent final heat treatment, annealing heat treatment is typically required.

[0003] In current production practices, the annealing of shaft forgings is typically carried out in conventional box-type heat treatment furnaces. During operation, workers need to open the furnace door and use lifting equipment or manual labor to move the forgings into the designated position within the furnace chamber. However, this traditional method has gradually revealed its inherent shortcomings over time. First, shaft forgings are often long and heavy, and accurately moving them and placing them stably deep within the confined space of the furnace is itself a labor-intensive and inconvenient task. Especially during continuous production and when the furnace is still warm, loading and unloading not only creates a harsh working environment but also poses safety hazards such as burns and injuries to operators.

[0004] Secondly, in order to store forgings, existing heat treatment furnaces typically only utilize the space at the bottom of the furnace chamber, placing the forgings in a single layer or simply stacking them. This method results in the huge vertical space above the furnace chamber being left idle and wasted, leading to very low space utilization and load capacity per furnace cycle, directly impacting production efficiency and increasing energy consumption per unit product.

[0005] More importantly, for some shaft forgings with large length-to-diameter ratios, when they are simply supported at both ends or a few points at high temperatures, the creep effect of the material becomes significant. The forgings are prone to bending and sagging between the support points due to their own weight, leading to permanent deformation. This deformation not only seriously affects the final dimensional accuracy of the product, but may even lead to the scrapping of an entire batch of products, causing huge economic losses. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides an annealing heat treatment device for shaft forgings, which aims to improve the problems of inconvenient loading and unloading of workpieces, low safety, low utilization of furnace space, and easy deformation of forgings at high temperatures due to insufficient support in the annealing heat treatment device for shaft forgings.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an annealing heat treatment device for shaft forgings, comprising: an annealing heat treatment group, and a door panel rotatably connected to the outer wall of the annealing heat treatment group via a fixed block and a fixed shaft; and a pull-out mechanism and a support mechanism disposed inside the annealing heat treatment group.

[0008] The pull-out mechanism includes a shelf, the lower surface of which is slidably supported on a roller rotatably mounted on a rotating shaft; the support mechanism includes at least two vertically arranged support rods and a shelf sleeved on the outer wall of the support rods.

[0009] Furthermore, both the pull-out mechanism and the support mechanism are fixedly installed inside the annealing heat treatment group. The rotating shaft of the pull-out mechanism is fixed to the inner wall of the annealing heat treatment group. The front end of the shelf is connected to a pull ring for pulling. The inner wall of the annealing heat treatment group is also provided with a stop to prevent the shelf from falling off.

[0010] Preferably, a limiting slide bar is fixed on the lower surface of the shelf, and a limiting groove is provided on the inner wall of the annealing heat treatment group to slide and cooperate with the limiting slide bar, which is used to guide the shelf during the pulling process.

[0011] Preferably, the shelf and the pull ring are connected by an extension block.

[0012] Preferably, the support mechanism is positioned above the pull-out mechanism to make full use of the furnace space.

[0013] Preferably, the support rod includes a first support rod, a second support rod, and a third support rod.

[0014] Preferably, at least one of the first support rod, the second support rod, and the third support rod is configured to adjust its spacing from other support rods by rotating about its own axis to accommodate workpieces of different lengths.

[0015] Preferably, the two ends of the shelf are respectively fitted onto any two of the first support rod, the second support rod, and the third support rod.

[0016] Preferably, the shelf and the support rod are fitted with a clearance, so that the support rod can rotate relative to the shelf when the clearance is adjusted, without affecting the stability of the shelf.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, by setting a shelf that can be pulled out from inside the furnace body, the operator can complete the loading and unloading of heavy shaft forgings from outside the furnace body without having to put his body into the still warm or narrow furnace chamber, which fundamentally avoids the risk of burns or bumps and significantly reduces labor intensity.

[0019] 2. In this utility model, a support mechanism is added inside the furnace body, realizing three-dimensional utilization of the vertical space inside the furnace. This allows for the processing of a larger number of forgings in a single heat treatment, significantly increasing the output per furnace. Simultaneously, the convenient loading and unloading method shortens auxiliary operation time, further improving overall production efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an annealing heat treatment device for shaft forgings proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the drawing mechanism of an annealing heat treatment device for shaft forgings proposed in this utility model.

[0022] Figure 3 This is a schematic diagram of the annealing heat treatment group of an annealing heat treatment device for shaft forgings proposed in this utility model.

[0023] Figure 4 This is a schematic diagram of the support mechanism of an annealing heat treatment device for shaft forgings proposed in this utility model.

[0024] Legend:

[0025] 1. Annealing heat treatment assembly; 2. Door panel; 3. Pull-out mechanism; 301. Shelf; 302. Extending block; 303. Pull ring; 304. Limiting slide bar; 305. Stop block; 306. Rotating shaft; 307. Roller; 308. Limiting groove; 4. Support mechanism; 401. First support rod; 402. Second support rod; 403. Third support rod; 404. Shelf; 5. Fixing block; 6. Fixing shaft. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figures 1 to 4This utility model provides an annealing heat treatment device for shaft forgings, which aims to solve the problems of inconvenient operation, low safety and low utilization of furnace space in the existing heat treatment devices for shaft forgings when loading and unloading workpieces.

[0028] like Figure 1 As shown, the device includes an annealing heat treatment group 1 and a door panel 2. Two fixed blocks 5 are fixedly connected to the outer wall of the annealing heat treatment group 1, and a fixed shaft 6 is rotatably connected between the two fixed blocks 5. The door panel 2 is mounted on the fixed shaft 6 by means of hinge, so that it can rotate around the fixed shaft 6 to open and close the annealing heat treatment group 1.

[0029] Reference Figures 1 to 4 The annealing heat treatment unit 1 is internally equipped with a pull-out mechanism 3 and a support mechanism 4. The pull-out mechanism 3 includes a shelf 301, which is used to support the forgings to be treated. A rotating shaft 306 is fixedly connected to the inner wall of the annealing heat treatment unit 1 along its depth direction. A roller 307 is rotatably sleeved on the outer wall of the rotating shaft 306. The lower surface of the shelf 301 is slidably supported on the roller 307. When the shelf 301 is pulled out, the roller 307 can rotate on the rotating shaft 306. A pull ring 303 is fixedly connected to the front end face of the shelf 301 to facilitate the operator to apply force. To allow the storage plate 301 to be pulled out or pushed in, a stop block 305 is also fixedly provided on the inner wall of the annealing heat treatment group 1. The stop block 305 is located at the end of the pulling path of the storage plate 301 and is used to abut against its rear end when the storage plate 301 is pulled out to limit it, thereby preventing the storage plate 301 from completely sliding out of the annealing heat treatment group 1 and falling down. The support mechanism 4 is also provided inside the annealing heat treatment group 1. It includes at least two vertically arranged support rods and a shelf 404. The shelf 404 is sleeved and connected to the outer wall of the support rods and is used to place shaft forgings in the upper space of the annealing heat treatment group 1.

[0030] In one specific embodiment, to further improve the stability of the pull-out mechanism, a limiting slide rod 304 is fixedly connected to the lower surface of the shelf 301. A limiting groove 308 is correspondingly formed on the inner wall of the annealing heat treatment assembly 1. The limiting slide rod 304 is slidably connected within the limiting groove 308 to guide the pull-out process of the shelf 301 and prevent it from deviating. The shelf 301 and the pull ring 303 are fixedly connected by a protruding block 302.

[0031] The support mechanism 4 is located above the pull-out mechanism 3 to maximize the use of the furnace space. Specifically, the support rods of the support mechanism 4 include a first support rod 401, a second support rod 402, and a third support rod 403. At least one of the first support rod 401, the second support rod 402, and the third support rod 403 is configured to be able to adjust its distance from other support rods by rotating around its own axis to accommodate shaft forgings of different sizes. The two ends of the shelf 404 are respectively fitted onto any two of the first support rod 401, the second support rod 402, and the third support rod 403, and the shelf 404 and the support rods are in clearance fit. This fit ensures that the shelf 404 remains stable when adjusting the distance between the support rods and does not affect the adjustment operation.

[0032] Working principle: When annealing heat treatment is required for shaft forgings, first open the door panel 2. If the upper support mechanism 4 is needed, the operator can rotate the first support rod 401, the second support rod 402, and the third support rod 403 to adjust the distance between the support rods to accommodate forgings of different sizes. Then, place the forging on the shelf 404 sleeved on the support rods. If the lower pull-out mechanism 3 is needed, the operator pulls the pull ring 303 connected to the extension block 302 to slide the shelf 301 outward. During the sliding process, the lower surface of the shelf 301 rolls on the roller 307, which rotates around the fixed rotating shaft 306. The movement allows for effortless pulling. Simultaneously, the limiting slide bar 304, fixed to the lower surface of the shelf 301, slides within the limiting groove 308, acting as a guide to prevent deviation until the shelf 301 is stopped by the stop block 305. At this point, the forging to be processed is placed on the shelf 301 and then pushed back into the annealing heat treatment group 1. After the forging is placed, the door panel 2, hinged by the fixing block 5 and the fixing shaft 6, is closed, and the annealing heat treatment group 1 is started for the annealing process. After the heat treatment is completed and the forging has cooled down, the door panel 2 is opened again, and the shelf 301, along with the processed forging, can be smoothly pulled out of the furnace by pulling the pull ring 303, making it convenient and safe to remove the parts.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An annealing heat treatment apparatus for shaft forgings, characterized in that, include: An annealing heat treatment assembly (1), a door panel (2), wherein a fixing block (5) is fixed to the outer wall of the annealing heat treatment assembly (1), and a fixing shaft (6) is connected between the two fixing blocks (5), and the door panel (2) is rotatably connected to the fixing shaft (6), characterized in that the interior of the annealing heat treatment assembly (1) is fixedly provided with: A pull-out mechanism (3) includes a shelf (301), a rotating shaft (306) fixedly mounted on the inner wall of the annealing heat treatment unit (1), a roller (307) rotatably mounted on the rotating shaft (306), the lower surface of the shelf (301) slidably supported on the roller (307), a pull ring (303) for pulling is connected to the front end of the shelf (301), and a stop (305) for preventing the shelf (301) from falling off the roller (307) is also provided on the inner wall of the annealing heat treatment unit (1); and The support mechanism (4) includes at least two vertically arranged support rods and a shelf (404), which is sleeved on the outer wall of the support rods.

2. The annealing heat treatment apparatus for shaft forgings according to claim 1, characterized in that: The lower surface of the shelf (301) is fixed with a limiting slide rod (304), and the inner wall of the annealing heat treatment group (1) is provided with a limiting groove (308) that slides with the limiting slide rod (304).

3. The annealing heat treatment apparatus for shaft forgings according to claim 1, characterized in that: The shelf (301) and the pull ring (303) are connected by an extension block (302).

4. The annealing heat treatment apparatus for shaft forgings according to claim 1, characterized in that: The support mechanism (4) is located above the pull-out mechanism (3).

5. An annealing heat treatment apparatus for shaft forgings according to claim 1, characterized in that: The support mechanism (4) includes a first support rod (401), a second support rod (402), and a third support rod (403).

6. An annealing heat treatment apparatus for shaft forgings according to claim 5, characterized in that: At least one of the first support rod (401), the second support rod (402), and the third support rod (403) is configured to adjust its spacing from the other support rods by rotating about its own axis.

7. An annealing heat treatment apparatus for shaft forgings according to claim 6, characterized in that: The two ends of the shelf (404) are respectively fitted onto any two of the first support rod (401), the second support rod (402), and the third support rod (403).

8. An annealing heat treatment apparatus for shaft forgings according to claim 7, characterized in that: The shelf (404) and the support rod are fitted with a clearance to allow the support rod to rotate relative to the shelf (404) when the spacing is adjusted.

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