A normalizing furnace for processing automobile steering shaft
By connecting the detachable slider to the fixed frame and designing reinforcing ribs, the problem of easy deformation of the normalizing furnace placement frame under high temperature is solved, which realizes uniform heating of workpieces and equipment stability, reduces maintenance costs and improves production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU KEJU HEAT TREATMENT CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-26
AI Technical Summary
The existing mounting structure of the normalizing furnace is prone to bending and deformation under high temperature, which can lead to uneven heating or detachment of workpieces, affecting production quality and equipment operation stability.
The system employs a detachable slider and fixed frame connection method, combined with the design of reinforcing ribs and reinforcing plates, to ensure the stability and load-bearing capacity of the placement frame. Rollers and grooves enable flexible movement and precise positioning of the placement components.
It improves the stability of the placement rack and the versatility of the equipment, ensures uniform heating of workpieces, reduces maintenance costs, and improves production efficiency and quality.
Smart Images
Figure CN224411842U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive steering shaft processing technology, specifically a normalizing furnace for automotive steering shaft processing. Background Technology
[0002] In the field of automotive steering shaft processing, the normalizing furnace is a key piece of equipment to ensure the mechanical properties of steering shaft materials. By uniformly heating and isothermally cooling the forged steering shaft blank, it can effectively refine the grains and eliminate internal stress, laying a good material foundation for subsequent precision machining. At present, the normalizing furnace mostly uses a suspended placement method to process steering shaft workpieces. That is, the workpiece is carried by a placement rack on a trolley, and the fixed bracket hanging rod on the placement rack directly suspends the steering shaft blank to be processed. The trolley drives the placement rack to enter and exit the furnace to complete the heat treatment process.
[0003] The existing mounting structure of the normalizing furnace has obvious defects: the mounting rods, as the core components that directly bear the weight of the workpieces, are prone to bending and deformation due to insufficient material strength or unreasonable structural design. Under the combined effects of the weight of the steering shaft blank and the high temperature of the furnace (usually 500-900℃) for a long time, the hanging rods change their suspension spacing, causing the originally orderly arranged workpieces to lose stable support. At best, they will squeeze and stack each other, resulting in uneven heating of the workpieces during the heating process and quality problems such as local performance failure. At worst, the workpieces will fall off the bent hanging rods and onto the trolley, causing not only surface damage to the workpieces, but also potentially jamming the trolley tracks, causing equipment malfunctions, affecting production continuity, increasing workpiece rework rate and equipment maintenance costs. Utility Model Content
[0004] Therefore, the purpose of this utility model is to provide a normalizing furnace for processing automotive steering shafts, so as to solve the technical problems in the background art mentioned above.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a normalizing furnace for processing automotive steering shafts, comprising a ground guide rail and a normalizing furnace body, a furnace door installed on one side of the normalizing furnace body, a flue gas duct provided on the top of the normalizing furnace body, a trolley placed above the ground guide rail, a slide rail provided on the top of the trolley, a plurality of placement components connected to the top of the slide rail, the placement components comprising a fixing frame, a plurality of sliders connected inside the fixing frame, a placement frame and reinforcing ribs connected outside the sliders, and the reinforcing ribs being connected to the placement frame.
[0006] Furthermore, the mounting bracket has a placement groove inside, and the slider is detachably connected to the mounting bracket through the placement groove.
[0007] By adopting the above technical solution, the detachable connection between the slider and the fixed frame facilitates the individual replacement of damaged sliders or placement frames without the need to replace the entire placement assembly, thus reducing maintenance costs. At the same time, placement frames with different spacings can be replaced according to the size specifications of the steering shaft, improving the versatility of the equipment.
[0008] Furthermore, the placement slot is T-shaped, and the slider is convex.
[0009] By adopting the above technical solution, the cooperation between the "T"-shaped placement groove and the "convex"-shaped slider can achieve precise positioning of the slider and the fixed frame, avoid lateral displacement of the slider during heating or load-bearing process, and ensure the stability of the placement frame; at the same time, the structure increases the contact area, disperses the pressure brought by the weight of the workpiece, and reduces local wear.
[0010] Furthermore, the placement slots are provided in two sets, and the two sets of placement slots are symmetrically distributed.
[0011] By adopting the above technical solution, the symmetrically distributed placement slots allow sliders and placement racks to be installed on both sides of the fixing frame, improving the space utilization of the fixing frame and increasing the number of workpieces that can be heat-treated in a single process; at the same time, the forces on both sides are balanced, preventing the fixing frame from tilting due to excessive load on one side.
[0012] Furthermore, there are multiple placement racks, and the multiple placement racks are distributed at equal intervals.
[0013] By adopting the above technical solution, the equidistantly distributed placement rack can maintain a uniform gap between the steering shafts, ensuring that the hot airflow can flow fully between the workpieces during the heating process, ensuring that each steering shaft is heated evenly, and improving the normalizing quality; at the same time, it avoids local temperature differences caused by the contact between workpieces.
[0014] Furthermore, the reinforcing ribs are arranged at an angle.
[0015] By adopting the above technical solution, the inclined reinforcing ribs form a triangular support structure, which enhances the load-bearing capacity of the placement frame by utilizing the stability of the triangle and effectively resists deformation under high temperature. The reinforcing ribs are welded and fixed to the placement frame and the slider respectively. The welding and fixing method ensures the connection strength between the reinforcing ribs and the placement frame and the slider, and avoids loosening after long-term use.
[0016] Furthermore, the bottom of the fixing frame is connected to four rollers, and the four rollers are symmetrically distributed in pairs.
[0017] By adopting the above technical solution, the rollers convert the sliding friction between the fixed frame and the slide rail into rolling friction, reducing the resistance when the placement component moves along the slide rail, making it easier for staff to push the placement component to adjust its position; the symmetrically distributed rollers ensure that the fixed frame is subjected to balanced force, avoiding jamming or tilting during movement.
[0018] Furthermore, the fixing frame is connected to reinforcing plates on both sides, and the reinforcing plates are triangular in shape.
[0019] By adopting the above technical solutions, the triangular reinforcing plate can enhance the overall structural strength of the fixing frame, resist thermal deformation under high temperature environment, and prevent the fixing frame from shifting its position due to its own deformation; the welding fixing method ensures that the reinforcing plate and the fixing frame form an integral load-bearing structure, improving durability.
[0020] Furthermore, the bottom of the fixing frame is provided with a sliding groove, and the fixing frame is slidably connected to the slide rail through the sliding groove.
[0021] By adopting the above technical solution, the cooperation between the slide groove and the slide rail provides a guiding function for the fixed frame, ensuring that the placed components move in a straight line and avoid deviating from the track; at the same time, the slide groove can limit the longitudinal movement of the fixed frame, preventing the fixed frame from falling off the slide rail due to vibration during the heating process.
[0022] Furthermore, the outer surface of the fixing frame is provided with a forklift hole, and the forklift hole penetrates through the outer surface and back of the fixing frame.
[0023] By adopting the above technical solutions, the forklift hole makes it easy for workers to use forklifts to move the fixed frame without manual lifting, thus reducing labor intensity; the through-type design ensures that the forklift forks are subjected to balanced force, preventing the fixed frame from tilting and causing the workpiece to fall during the handling process.
[0024] In summary, the present invention has the following main advantages:
[0025] 1. This utility model significantly improves the load-bearing capacity and high-temperature deformation resistance of the placement component by setting a detachable slider and placement frame, combined with the reinforcement structure of reinforcing ribs and reinforcing plates, effectively avoiding workpiece stacking or falling off due to bending of the placement frame, and ensuring the stability of the heat treatment process.
[0026] 2. This utility model achieves flexible movement and precise positioning of the placement components through the cooperation of slide rails, rollers and slide grooves. Combined with the design of forklift holes, it simplifies the workpiece loading and unloading and trolley loading process and improves production efficiency. At the same time, the equidistantly distributed placement racks and symmetrical structure ensure that the workpiece is heated evenly and improves the normalizing quality. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the trolley structure of this utility model;
[0029] Figure 3 This is a schematic diagram of the roller structure of this utility model;
[0030] Figure 4 This is a schematic diagram of the fixing frame structure of this utility model;
[0031] Figure 5 This is a schematic diagram of the placement rack structure of this utility model.
[0032] In the diagram: 1. Ground guide rail; 2. Normalizing furnace body; 3. Flue; 4. Furnace door; 5. Trolley; 6. Slide rail; 7. Placement assembly; 701. Fixing frame; 702. Placement groove; 703. Sliding block; 704. Placement rack; 705. Reinforcing rib; 706. Roller; 707. Slide groove; 8. Reinforcing plate; 9. Forklift hole. Detailed Implementation
[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0034] The embodiments of this utility model will be described below based on its overall structure.
[0035] Example 1: A normalizing furnace for machining automotive steering shafts, such as... Figures 1-5 As shown, the system includes a ground guide rail 1 and a normalizing furnace body 2. A furnace door 4 is installed on one side of the normalizing furnace body 2, and a flue duct 3 is provided on the top of the normalizing furnace body 2. A trolley 5 is placed above the ground guide rail 1, and a slide rail 6 is provided on the top of the trolley 5. Several placement components 7 are connected to the top of the slide rail 6. The placement components 7 include a fixed frame 701, several sliders 703 are connected inside the fixed frame 701, and placement frames 704 and reinforcing ribs 705 are connected to the outside of the sliders 703. The reinforcing ribs 705 are connected to the placement frames 704. The fixed frame 701 has a placement groove 702 inside, and the sliders 703 are detachably connected to the fixed frame 701 through the placement groove 702. The detachable connection between the sliders 703 and the fixed frame 701 makes it easy to replace damaged sliders 703 or placement frames 704 individually without replacing the entire placement component 7, thus reducing maintenance costs. At the same time, placement frames 704 with different spacings can be replaced according to the size specifications of the steering shaft, improving the versatility of the equipment.
[0036] See Figure 2 , Figure 3 and Figure 4 In the above embodiment, the placement groove 702 is T-shaped and the slider 703 is convex. The cooperation between the T-shaped placement groove 702 and the convex slider 703 can achieve precise positioning of the slider 703 and the fixed frame 701, avoid the slider 703 from shifting laterally during heating or bearing, and ensure the stability of the placement frame 704. At the same time, this structure increases the contact area, disperses the pressure brought by the weight of the workpiece, and reduces local wear.
[0037] See Figure 4 In the above embodiment, there are two sets of placement slots 702, and the two sets of placement slots 702 are symmetrically distributed. The symmetrically distributed placement slots 702 can install sliders 703 and placement racks 704 on both sides of the fixing frame 701, thereby improving the space utilization of the fixing frame 701 and increasing the number of workpieces that can be heat treated in a single process. At the same time, the forces on both sides are balanced, preventing the fixing frame 701 from tilting due to excessive load on one side.
[0038] See Figure 2 , Figure 3 , Figure 4 and Figure 5 In the above embodiments, multiple placement racks 704 are provided, and the multiple placement racks 704 are distributed at equal intervals. The equally distributed placement racks 704 can maintain a uniform gap between the steering shafts, ensure that the hot airflow can flow fully between the workpieces during the heating process, ensure that each steering shaft is heated evenly, and improve the normalizing quality; at the same time, it avoids local temperature differences caused by the contact between workpieces.
[0039] See Figure 5 In the above embodiment, the reinforcing rib 705 is inclined and forms a triangular support structure. The stability of the triangle enhances the load-bearing capacity of the placement frame 704 and effectively resists deformation under high temperature. The reinforcing rib 705 is welded and fixed to the placement frame 704 and the slider 703 respectively. The welding and fixing method ensures the connection strength between the reinforcing rib 705 and the placement frame 704 and the slider 703, and avoids loosening after long-term use.
[0040] See Figure 3 In the above embodiment, the bottom of the fixing frame 701 is connected to four rollers 706, and the four rollers 706 are symmetrically distributed in pairs. The rollers 706 convert the sliding friction between the fixing frame 701 and the slide rail 6 into rolling friction, which reduces the resistance when the placement component 7 moves along the slide rail 6, making it easier for the staff to push the placement component 7 to adjust its position. The symmetrically distributed rollers 706 ensure that the fixing frame 701 is subjected to balanced force, avoiding jamming or tilting during movement.
[0041] See Figure 2 , Figure 3 and Figure 4 In the above embodiment, the fixing frame 701 is connected to the two sides of the reinforcing plate 8, and the reinforcing plate 8 is triangular. The triangular reinforcing plate 8 can enhance the overall structural strength of the fixing frame 701, resist thermal deformation under high temperature environment, and prevent the fixing frame 701 from shifting the position of the placement frame 704 due to its own deformation. The welding fixing method ensures that the reinforcing plate 8 and the fixing frame 701 form an integral force-bearing structure, improving durability.
[0042] See Figure 3 and Figure 4In the above embodiment, the bottom of the fixing frame 701 is provided with a sliding groove 707, and the fixing frame 701 is slidably connected to the slide rail 6 through the sliding groove 707. The cooperation between the sliding groove 707 and the slide rail 6 provides a guiding function for the fixing frame 701, ensuring that the placement component 7 moves in a straight line and avoids deviating from the track; at the same time, the sliding groove 707 can longitudinally limit the fixing frame 701 to prevent the fixing frame 701 from falling off the slide rail 6 due to vibration during the heating process.
[0043] Example 2: To reduce the workload of workers, Example 2 is an improvement on Example 1. (See attached document.) Figure 2 , Figure 3 and Figure 4 The outer surface of the fixed frame 701 is provided with a forklift hole 9, which extends through the outer surface and back of the fixed frame 701. The forklift hole 9 facilitates the use of forklifts by workers to move the fixed frame 701 without the need for manual lifting, thus reducing labor intensity. The through-type design ensures that the forklift forks are evenly stressed, preventing the fixed frame 701 from tilting during handling and causing the workpiece to fall.
[0044] The implementation principle of this utility model is as follows: First, the operator inserts the forklift fork arm into the forklift hole 9 of the fixing frame 701, and places the fixing frame 701 stably on the slide rail 6 on the top of the trolley 5. At this time, the roller 706 at the bottom of the fixing frame 701 contacts the slide rail 6, and the sliding groove 707 cooperates with the slide rail 6 to achieve initial positioning. Then, according to the size of the steering shaft to be processed, a slider 703 with a corresponding spacing is selected. The "convex" shaped slider 703 is aligned with the "T" shaped placement groove 702 of the fixing frame 701 and pushed in along the groove to complete the installation. At this time, the slider 703 and the fixing frame 701 are tightly fitted to ensure stability. Next, the steering shafts to be heat-treated are placed sequentially on the placement frame 704. The equidistantly distributed placement frames 704 maintain a uniform gap between the steering shafts, and the inclined reinforcing ribs 705... The placement frame 704 provides additional support to prevent deformation under load. After a single placement component 7 is filled, the fixing frame 701 is pushed, and the roller 706 rolls along the slide rail 6 to move it to the reserved position on one side of the trolley 5. The above steps are repeated to install multiple placement components 7 on the trolley 5 until it is full, ensuring that there is no collision or interference between the components. After the last assembly is completed, the fixing rod is inserted into the round hole to fix all the placement components. Then, the trolley 5 is pushed to move along the ground guide rail 1 into the furnace body 2 of the normalizing furnace. The furnace door 4 is closed, and the heating system is started to normalize the steering shaft. The flue gas generated during the heating process is discharged through the exhaust duct 3. After the normalizing is completed, the furnace door 4 is opened, the trolley 5 is moved out, and after the workpiece has cooled, the placement component 7 is moved out of the trolley 5 by a forklift. The steering shaft can then be removed to complete the processing.
[0045] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.
Claims
1. A normalizing furnace for machining of automobile steering shafts, comprising a ground guide rail (1) and a normalizing furnace body (2), characterized in that: A furnace door (4) is installed on one side of the furnace body (2). A flue (3) is provided on the top of the furnace body (2). A trolley (5) is placed above the ground guide rail (1). A slide rail (6) is provided on the top of the trolley (5). Several placement components (7) are connected to the top of the slide rail (6). The placement components (7) include a fixing frame (701). Several sliders (703) are connected inside the fixing frame (701). A placement frame (704) and a reinforcing rib (705) are connected to the outside of the sliders (703). The reinforcing rib (705) is connected to the placement frame (704).
2. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1, wherein: The fixing frame (701) has a placement groove (702) inside, and the slider (703) is detachably connected to the fixing frame (701) through the placement groove (702).
3. The normalizing furnace for machining of automobile steering shafts as claimed in claim 2, wherein: The placement groove (702) is T-shaped, and the slider (703) is convex.
4. The normalizing furnace for machining of automobile steering shafts as claimed in claim 2, wherein: The placement slots (702) are provided in two sets, and the two sets of placement slots (702) are symmetrically distributed.
5. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The placement rack (704) is provided in multiple ways, and the multiple placement racks (704) are distributed at equal intervals.
6. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The reinforcing rib (705) is inclined.
7. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The bottom of the fixing frame (701) is connected to four rollers (706), and the four rollers (706) are symmetrically distributed in pairs.
8. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The fixing frame (701) is connected to reinforcing plates (8) on both sides, and the reinforcing plates (8) are triangular.
9. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The bottom of the fixing frame (701) is provided with a sliding groove (707), and the fixing frame (701) is slidably connected to the slide rail (6) through the sliding groove (707).
10. The normalizing furnace for machining of automobile steering shafts as claimed in claim 1 wherein: The outer surface of the fixing frame (701) is provided with a forklift hole (9), and the forklift hole (9) penetrates the outer surface and back of the fixing frame (701).