Shenzhen Wuge Industrial Co., Ltd

The shaping process of nickel titanium wire mainly includes two key steps: shaping and heat treatment. The following is a detailed introduction:

1、 Pre processing steps before finalization

Before shaping, nickel titanium wire needs to be pre treated. For example, nickel titanium wire needs to be cleaned, degreased, and other operations to remove potential impurities on the surface, ensuring that the presence of impurities does not affect the shaping effect during the shaping process.

2、 Forming process

Types and application scenarios of nickel titanium wire shaping molds

Electric mold:

Widely used in large-scale production and industrial and medical fields that require high precision and efficiency in shaping. Taking the medical field as an example, in the manufacturing of nickel titanium wire medical devices such as stone baskets, electric molds can accurately control the shaping of the nickel titanium wire, ensuring the quality and performance of the product. In industry, for some nickel titanium wire products that require large-scale production and have complex shapes, electric molds can improve production efficiency.

Manual mold:

It is more suitable in some small, precision less demanding or experimental application scenarios. For example, in some research laboratories, manual molds can be used to meet the demand for producing a small number of nickel titanium wire samples with special shapes. The operation of manual molds is relatively simple and the cost is also relatively low.

Mold components and their functions

Thermal conductive plate: Its function is to evenly transfer heat. During the shaping process, if it is necessary to heat the nickel titanium wire (such as in some shaping processes related to thermal activation), the heat-conducting plate can ensure that the heat is evenly distributed around the nickel titanium wire, so that all parts of the nickel titanium wire are heated evenly, avoiding local overheating or undercooling that may affect the shaping effect.

Forming groove: used to place nickel titanium wire and provide an initial position for shaping the nickel titanium wire. Its shape and size can be designed according to the shape and size of the nickel titanium wire that needs to be shaped, ensuring that the nickel titanium wire can be accurately shaped in the groove.

Fixed plate and clamping plate: The fixed plate provides a fixed support surface for the nickel titanium wire, while the clamping plate cooperates with the fixed plate to clamp the nickel titanium wire. During the shaping process, the nickel titanium wire needs to maintain a stable position. By coordinating the clamping plate and the fixing plate, the nickel titanium wire can be prevented from displacement when subjected to external forces (such as compression from the shaping plate), thereby ensuring the accuracy of shaping.

Horizontal bar: The horizontal bar connects other components such as fixed plates and connecting plates, playing a role in transmitting force and supporting. When the shaping board needs to move, the crossbar can transmit power to the shaping board and ensure the direction and stability of its movement.

Forming plate: Forming plate is a component that directly compresses and bends nickel titanium wire. According to the curvature requirements of the nickel titanium wire, the movement distance of the shaping plate can be adjusted to compress and bend the nickel titanium wire into the desired shape.

Locking bolt: The function of the locking bolt is to fix the nickel titanium wire. By tightening the locking bolt, the clamping plate can be moved downwards, thereby firmly fixing the nickel titanium wire between the fixed plate and the clamping plate, preventing the nickel titanium wire from loosening during the shaping process.

Worm and screw: They belong to the transmission mechanism. When the rotary knob or knob drives the worm to rotate, the worm drives the screw to rotate. The sliding block on the screw will move according to the thread direction of the screw, and then push the shaping plate to move through the connecting rod, achieving precise shaping of the nickel titanium wire.

Standardized operation steps

Firstly, place the nickel titanium wire in the shaping groove, and then use a clamping plate and a fixing plate to clamp the nickel titanium wire. For example, by tightening the knob downwards to drive the locking bolt to rotate downwards, the corresponding clamping plate is pushed to move downwards, and the clamping plate is matched with the corresponding fixed plate to clamp the nickel titanium wire.

Next, by rotating the knob or knob to drive the transmission mechanism such as worm and screw, the shaping plate is moved outward to compress and bend the nickel titanium wire. According to the curvature requirements of nickel titanium wire, the movement distance of the shaping plate can be adjusted to achieve the desired shaping effect.

3、 Heat treatment steps

Heat treatment parameters

Temperature range: According to relevant research, the higher the heat setting temperature and the longer the heating time, the better the heat setting effect of nickel titanium wire, and the closer the size of nickel titanium wire is to the size of the forming mold. For example, in some experiments, heat setting at a temperature of 550 ℃ can achieve good results.

Time: According to the experimental results, when the heating time is more than 10 minutes, the residual strain of nickel titanium wire will significantly increase, while the processing conditions of 550 ℃ and 20 minutes result in the minimum stress on the upper and lower platforms. But the specific time needs to be determined based on the material, size, and shaping requirements of the nickel titanium wire. These parameters will affect the shape memory effect of nickel titanium wire, and appropriate temperature and time can maintain the formed shape of nickel titanium wire at high temperatures and enhance its shape memory effect.

Heat treatment operation

Place the finalized nickel titanium wire in a heating device (such as a shaping furnace) for heat shaping treatment.

4、 Quality inspection standards and methods after finalization

Tensile testing: The tensile performance of nickel titanium wire is tested using a tensile strength tester to examine its performance under tension, including its elasticity, strength, and other performance indicators, to ensure that the mechanical properties of the nickel titanium wire meet the requirements.

Bending test: to detect the shape memory effect of nickel titanium wire. Observe whether the recovery ability of nickel titanium wire after bending meets expectations, ensuring that it can automatically return to its original state or maintain its fixed shape at a specific temperature.

Overall, the nickel titanium wire shaping process is a delicate and complex process that requires precise mold design, strict heat treatment control, and subsequent quality inspection to manufacture nickel titanium wire products with various shapes and excellent performance, meeting the diverse needs of medical devices and other fields.