Heat treatment equipment for memory alloy chain

Abstract

The utility model discloses heat treatment equipment for a memory alloy chain, which comprises a double-layer profile frame, an upper double-shaft traction structure, a lower double-shaft traction structure and a protective shell, wherein the upper double-shaft traction structure and the lower double-shaft traction structure are mounted at the upper position and the lower position in the double-layer profile frame; the protective shell is mounted on the outer wall of one side of the double-layer profile frame; and a rotary driving assembly used for driving the upper double-shaft traction structure and the lower double-shaft traction structure to synchronously work in the same direction is installed in the protective shell, and a soil-shaped frame is fixed to one end of the surface of the double-layer profile frame. According to the utility model, the memory alloy chain to be annealed is placed on the upper double-shaft traction structure and the lower double-shaft traction structure, and the memory alloy chain passes through the electromagnetic induction heating coil; and the upper double-shaft traction structure and the lower double-shaft traction structure are driven to work through the rotary driving assembly, so that the memory alloy chain moves slowly until the whole memory alloy chain completes annealing operation.

Description

Technical Field

[0001] This utility model relates to the field of chain heat treatment technology, specifically to a heat treatment device for shape memory alloy chains. Background Technology

[0002] Annealing heat treatment of shape memory alloy chains is a crucial process designed to optimize the internal structure and properties of the material by controlling temperature and time. Its main functions include eliminating internal stresses generated during manufacturing, improving crystal structure, and enhancing the material's toughness and plasticity, thereby strengthening its crack resistance and extending its service life. Furthermore, annealing can regulate the phase transformation temperature of the shape memory alloy, optimizing its "memory" characteristics. The entire annealing process includes preparation, preheating, main heat treatment (annealing), cooling, and post-treatment. In the preparation stage, material parameters need to be checked, the chain cleaned and degreased, and properly clamped. During the preheating stage, the temperature is slowly increased to the predetermined temperature to ensure uniform heating of the material. Subsequently, the temperature is raised to the annealing temperature (typically between 450°C and 650°C) and held at this temperature for a certain period to allow for the full release of internal stresses and grain rearrangement. The cooling process requires either slow or rapid cooling depending on the material requirements to ensure grain refinement and stress release. However, currently, during annealing heat treatment, workers still need to manually pull one or more shape memory alloy chains in an electromagnetic heating coil using clamps until the entire chain is annealed. Since the speed and position of each chain are controlled by the worker, it is difficult to achieve uniform movement. This is especially true when annealing long chains or multiple chains simultaneously, which increases the difficulty of operation. Furthermore, when pulling the chain, uneven force, different operating angles, or fatigue may cause the chain to move unevenly in the heating area, resulting in deviation, twisting, or stretching. These unstable factors can cause uneven heating of the chain during annealing, affecting the uniformity of the crystal structure and thus the performance of the shape memory alloy, and even causing defects such as cracks and deformation. Utility Model Content

[0003] The purpose of this invention is to provide a heat treatment device for shape memory alloy chains. Two shape memory alloy chains to be annealed are placed on an upper dual-axis traction structure and a lower dual-axis traction structure, and the shape memory alloy chains pass through an electromagnetic induction heating coil. When the electromagnetic induction heating coil starts to heat the shape memory alloy chains, the upper dual-axis traction structure and the lower dual-axis traction structure are driven by a rotation drive component to work, so that the shape memory alloy chains move slowly until the entire shape memory alloy chain completes the annealing operation, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a heat treatment device for shape memory alloy chains, comprising a double-layer profile frame, an upper dual-axis traction structure and a lower dual-axis traction structure installed at upper and lower positions inside the double-layer profile frame, and a protective shell installed on one outer wall of the double-layer profile frame. The protective shell contains a rotary drive assembly for driving the upper and lower dual-axis traction structures to work synchronously and in the same direction. One end of the surface of the double-layer profile frame is fixed with a T-shaped frame, and two electromagnetic induction heating coils extending into the double-layer profile frame are installed on one outer wall of the T-shaped frame. A control panel is installed on one outer wall of the protective shell, and the output end of the control panel is electrically connected to the input end of the rotary drive assembly and the electromagnetic induction heating coils.

[0005] Preferably, the upper dual-axis traction structure and the lower dual-axis traction structure have the same structural composition. The upper dual-axis traction structure includes a front axle, a steel roller, and a sprocket fixed at one end of the surface of the front axle and the steel roller, which are rotatably installed on the left and right sides inside the double-layer profile frame. A two-stage synchronous wheel transmission structure for maintaining power connection is installed between the same end of the steel roller and the front axle.

[0006] Preferably, the upper dual-axis traction structure further includes several rear shafts that are rotatably mounted in a linear, equally spaced array inside the double-layer profile frame.

[0007] Preferably, the end of the steel roller furthest from the secondary synchronous wheel transmission structure is equipped with a primary synchronous wheel transmission structure for driving the lower dual-shaft traction structure.

[0008] Preferably, the rotary drive assembly includes a stepper motor mounted on the inner wall of one side of the double-layer profile frame, an active synchronous pulley mounted on the end of the stepper motor drive shaft, and a driven synchronous pulley mounted on one end of the front shaft. A multi-wedge belt is fitted between the active synchronous pulley and the driven synchronous pulley, and the input end of the stepper motor is electrically connected to the output end of the control panel.

[0009] Preferably, the distance between two adjacent rear axle centerlines is 20cm to 30cm.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This heat treatment equipment for shape memory alloy chains utilizes a structure that integrates a double-layer profile frame, an electromagnetic induction heating coil, an upper dual-axis traction structure, and a lower dual-axis traction structure. Two shape memory alloy chains to be annealed are placed on the upper and lower dual-axis traction structures, with the chains passing through the electromagnetic induction heating coil. When the electromagnetic induction heating coil begins to heat the shape memory alloy chains, a rotary drive assembly drives the upper and lower dual-axis traction structures, causing the shape memory alloy chains to move slowly until the entire chain completes the annealing operation. The use of a dual-axis traction structure, in conjunction with the electromagnetic induction heating coil, enables the chain to move horizontally... The slow, steady movement in the direction of the chain, with its multi-point support and stable traction, helps ensure that the chain receives uniform annealing treatment throughout the heating area, avoiding localized overheating or uneven cooling. Especially when the chain is long or has a complex structure, the dual-axis traction effectively reduces temperature differences, ensuring that each segment of material can be annealed within the predetermined temperature range, thereby improving the material's performance stability and balancing the chain's tension during movement, preventing chain twisting, deformation, or breakage, and ensuring the continuity and stability of the entire annealing process. Secondly, the dual-axis traction structure is driven by a rotary drive component, allowing each segment of the chain to be fully exposed to a uniform electromagnetic field during movement, achieving continuous and uniform traction motion, reducing human error and vibration. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0013] Figure 3 This is a three-dimensional structural diagram of the upper-mounted dual-axis traction structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0015] Figure 5 This is a three-dimensional cross-sectional structural diagram of the present invention.

[0016] In the diagram: 1. Double-layer profile frame; 2. Upper-mounted dual-axis traction structure; 201. Front axle; 202. Sprocket; 203. Rear axle; 204. Steel roller; 205. Secondary synchronous pulley transmission structure; 3. Lower-mounted dual-axis traction structure; 4. Protective shell; 5. Rotary drive assembly; 6. Control panel; 7. Primary synchronous pulley transmission structure; 8. I-beam frame; 9. Electromagnetic induction heating coil. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] Please see Figure 1-5 This utility model provides an embodiment of a heat treatment device for a shape memory alloy chain, comprising a double-layer profile frame 1, an upper double-axis traction structure 2 and a lower double-axis traction structure 3 installed at the upper and lower positions inside the double-layer profile frame 1, and a protective shell 4 installed on one side of the outer wall of the double-layer profile frame 1. The protective shell 4 is equipped with a rotary drive assembly 5 for driving the upper double-axis traction structure 2 and the lower double-axis traction structure 3 to work synchronously and in the same direction. One end of the surface of the double-layer profile frame 1 is fixed with a T-shaped frame 8, and two electromagnetic induction heating coils 9 extending into the interior of the double-layer profile frame 1 are installed on one side of the outer wall of the T-shaped frame 8. The electromagnetic induction heating coils 9 use high-frequency current to generate an alternating magnetic field in the induction coil. The magnetic field penetrates the conductor and induces eddy currents inside the conductor. The eddy currents generate Joule heat after passing through the resistor, thereby realizing non-contact heating of the workpiece.

[0019] A control panel 6 is installed on one outer wall of the protective shell 4. The output end of the control panel 6 is electrically connected to the input end of the rotary drive assembly 5 and the electromagnetic induction heating coil 9.

[0020] The upper dual-shaft traction structure 2 and the lower dual-shaft traction structure 3 have the same structure. The upper dual-shaft traction structure 2 includes a front axle 201 and a steel roller 204 rotatably installed on the left and right sides inside the double-layer profile frame 1, and a sprocket 202 fixed at one end of the surface of the front axle 201 and the steel roller 204. A two-stage synchronous wheel transmission structure 205 for maintaining power connection is installed between the same end of the steel roller 204 and the front axle 201.

[0021] The upper-mounted dual-axis traction structure 2 also includes several rear shafts 203 that are rotatably mounted in a linear, equally spaced array inside the double-layer profile frame 1. The distance between the central axes of two adjacent rear shafts 203 is 20cm to 30cm. The front shaft 201 of the upper-mounted dual-axis traction structure 2 is driven to rotate by the rotary drive assembly 5, while the steel roller 204 rotates together under the drive of the secondary synchronous wheel transmission structure 205. When the chain is located on the sprocket 202 of the steel roller 204 and the front shaft 201, the chain can be pulled and moved. During the movement, the rear shafts 203 support the chain and assist its movement. Through the smooth and continuous traction of the chain workpiece, it is ensured that an appropriate speed and position are maintained in the heating area.

[0022] The steel roller 204 is equipped with a primary synchronous wheel transmission structure 7 at the end away from the secondary synchronous wheel transmission structure 205. This primary synchronous wheel transmission structure 7 is used to drive the lower dual-shaft traction structure 3. The steel roller 204 drives the lower dual-shaft traction structure 3 to move synchronously and in the same direction through the primary synchronous wheel transmission structure 7.

[0023] The rotary drive assembly 5 includes a stepper motor mounted on the inner wall of one side of the double-layer profile frame 1, an active synchronous pulley mounted on the end of the stepper motor drive shaft, and a driven synchronous pulley mounted on one end of the front shaft 201. A multi-ribbed belt is fitted between the active synchronous pulley and the driven synchronous pulley. The input end of the stepper motor is electrically connected to the output end of the control panel 6. The stepper motor in the rotary drive assembly 5 drives the front shaft 201 to rotate through the synchronous pulley and the multi-ribbed belt.

[0024] When the chain is pulled to the end, the worker needs to use clamps to hold the end of the chain and manually assist the chain into the electromagnetic induction heating coil 9 to complete the annealing operation according to the pulling speed of the upper dual-axis traction structure 2 and the lower dual-axis traction structure 3.

[0025] In this embodiment, the operator first prepares at least two shape memory alloy chains, removes oil and impurities from the chain surface, and neatly places the shape memory alloy chains to be annealed on the upper dual-axis traction structure 2 and the lower dual-axis traction structure 3 of the double-layer profile frame, ensuring that the chains are free from twisting and damage, ready for the annealing process. According to the annealing process requirements of the shape memory alloy chains, the operator adjusts the temperature parameters on the control panel 6, sets a suitable annealing temperature, and sets the rotation speed of the rotary drive assembly 5. By adjusting the traction speed of the upper dual-axis traction structure 2 and the lower dual-axis traction structure 3, the operator ensures that the chain moves slowly and evenly during the heating process. The electromagnetic induction heating coil 9 and the rotary drive assembly 5 are activated via the control panel 6, and the electromagnetic induction... The chain is heated by the heating coil 9, while the rotary drive assembly 5 drives the upper dual-axis traction structure 2 and the lower dual-axis traction structure 3 to slowly and smoothly pass through the heating area where the electromagnetic induction heating coil 9 is located. During the heating process, the operator observes the operating status of the equipment and, if necessary, fine-tunes the traction speed or the current of the heating coil to ensure uniform temperature and smooth chain movement. After reaching the preset temperature or time, the current of the electromagnetic induction heating coil 9 is gradually reduced to stop heating. While maintaining traction, the chain is allowed to cool slowly to avoid stress or deformation caused by sudden cooling. After confirming that the chain has cooled to a safe temperature, the annealed shape memory alloy chain is removed from the equipment for subsequent testing or processing.

Claims

1. A heat treatment device for shape memory alloy chains, characterized in that: The system includes a double-layer profile frame (1), an upper double-axis traction structure (2) and a lower double-axis traction structure (3) installed at the upper and lower positions inside the double-layer profile frame (1), and a protective shell (4) installed on one side of the outer wall of the double-layer profile frame (1). The protective shell (4) is equipped with a rotary drive assembly (5) for driving the upper double-axis traction structure (2) and the lower double-axis traction structure (3) to work synchronously and in the same direction. One end of the surface of the double-layer profile frame (1) is fixed with a T-shaped frame (8), and two electromagnetic induction heating coils (9) extending into the double-layer profile frame (1) are installed on one side of the outer wall of the T-shaped frame (8). A control panel (6) is installed on one side of the outer wall of the protective shell (4), and the output end of the control panel (6) is electrically connected to the input end of the rotary drive assembly (5) and the electromagnetic induction heating coil (9).

2. The heat treatment equipment for a shape memory alloy chain according to claim 1, characterized in that: The upper dual-axis traction structure (2) and the lower dual-axis traction structure (3) have the same structure. The upper dual-axis traction structure (2) includes a front axle (201), a steel roller (204) rotatably installed on the left and right sides inside the double-layer profile frame (1), and a sprocket (202) fixed at one end of the surface of the front axle (201) and the steel roller (204). A two-stage synchronous wheel transmission structure (205) for maintaining power connection is installed between the same end of the steel roller (204) and the front axle (201).

3. The heat treatment equipment for a shape memory alloy chain according to claim 2, characterized in that: The upper dual-axis traction structure (2) also includes several rear shafts (203) that are rotatably installed in a linear, equally spaced array inside the double-layer profile frame (1).

4. The heat treatment equipment for a shape memory alloy chain according to claim 2, characterized in that: The steel roller (204) is equipped with a primary synchronous wheel transmission structure (7) at the end away from the secondary synchronous wheel transmission structure (205) for driving the lower dual-shaft traction structure (3).

5. The heat treatment equipment for a shape memory alloy chain according to claim 2, characterized in that: The rotary drive assembly (5) includes a stepper motor installed on the inner wall of one side of the double-layer profile frame (1), an active synchronous wheel installed at the end of the stepper motor drive shaft, and a driven synchronous wheel installed at one end of the front shaft (201). A multi-wedge belt is fitted between the active synchronous wheel and the driven synchronous wheel. The input end of the stepper motor is electrically connected to the output end of the control panel (6).

6. The heat treatment equipment for a shape memory alloy chain according to claim 3, characterized in that: The distance between the centerlines of two adjacent rear axles (203) is 20cm to 30cm.

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