In the production process system of Multi-Style Pole Piece, brazing, as an important connection technology, undertakes the key task of combining different parts into pole shoe blanks. Pole shoes play a key role in the operation of electromagnetic equipment and motors. Their performance directly affects the overall efficiency of the equipment, and the application of brazing technology is an important part of ensuring the performance of pole shoes. ​
The components of pole shoes often have different functions and characteristics. To accurately combine these parts into a whole, a suitable connection method is required. Brazing has become a commonly used welding method in the production process of pole shoes due to its unique advantages. Its principle is based on the use of filler materials with lower melting points than the parent material. Under the condition that the heating temperature is higher than the melting point of the filler material and lower than the melting point of the parent material, the filler material is melted and wetted on the surface of the parent material, and flows into the gap of the parent material through capillary action. After cooling and solidification, a firm connection between parts is achieved. ​
In the production of multi-style pole shoes, combining different parts into pole shoe blanks is the basic stage of pole shoe forming. Taking the example of coaxially setting parts B and C with the head end of part A and brazing them together, this combination requires extremely high precision and stability. The coaxial setting of the parts itself places strict requirements on the processing and assembly process, and the brazing process needs to achieve reliable connection while ensuring that the relative positions of the parts remain unchanged. In this process, the low-temperature connection characteristics of brazing play an important role. In traditional welding methods, such as fusion welding, the high temperature generated during the welding process may cause the parts to deform, affecting the dimensional accuracy and magnetic field distribution of the pole shoe. Brazing can complete the connection at a lower temperature, which greatly avoids the problem of part deformation caused by high temperature, thereby ensuring the relative position accuracy of the various components of the pole shoe, which is crucial for the pole shoe to realize its function of guiding and concentrating the magnetic field. ​
In addition, the materials used in the manufacture of pole shoes are mostly ferromagnetic materials or other functional materials with special magnetic properties, and the magnetic properties of these materials are sensitive to temperature. If high-temperature welding is used, it is likely to change the magnetic properties of the material, thereby affecting the overall performance of the pole shoe. Since the welding temperature of brazing is relatively low, it will not have a significant impact on the magnetic properties of the parts. It can effectively maintain the original magnetic permeability and other key magnetic performance indicators of the pole shoe material, ensuring that the pole shoe can function normally in the magnetic field environment. Whether it is to improve the magnetic field distribution in the motor or to enhance the magnetic field strength in the electromagnetic equipment, maintaining the magnetic properties of the material is the basis for the normal operation of the pole shoe, and the advantages of brazing in this regard provide a strong guarantee for the performance of the pole shoe. ​
However, to give full play to the advantages of brazing in the production of pole shoes, it is essential to strictly control the various parameters in the brazing process. Brazing temperature is one of the key parameters. If the temperature is too low, the filler material cannot be fully melted, and it is difficult to achieve good wetting and filling, which will lead to insufficient strength of the welded joint. The pole shoe may become loose or even fall off during use, seriously affecting the safety and performance of the equipment. If the temperature is too high, the filler material may be over-melted, change its composition ratio, and may even cause a certain degree of damage to the parent material, which also affects the welding quality and pole shoe performance. Therefore, in actual operation, it is necessary to accurately set the brazing temperature according to the characteristics of the filling material and the material of the base material, and monitor and adjust it in real time through advanced temperature control equipment to ensure that the temperature is always in the appropriate range. ​
Brazing time is also an important factor affecting welding quality. If the welding time is too short, the filling material fails to fully complete the wetting, diffusion and solidification process, and there may be defects such as pores and unfusion inside the joint, which will reduce the strength and conductivity of the joint. If the welding time is too long, it will not only reduce production efficiency, but also cause excessive metallurgical reactions between the filling material and the base material, change the material properties, and may even cause the oxidation of parts to intensify, affecting the appearance and performance of the pole shoe. Therefore, in the process of making pole shoes, it is necessary to determine the optimal brazing time under different part combinations and filling materials through a large number of process tests and actual production verifications, and strictly control it during the production process. ​
The amount of welding material also needs to be precisely controlled. Insufficient filling material can not completely fill the gap between parts, which will cause discontinuity of the joint and affect the connection strength and conductivity. Excessive amount may form excess weld nodules at the joint, affecting the appearance and assembly accuracy of the pole shoe, and may even interfere with the magnetic field distribution of the pole shoe. Therefore, before brazing, it is necessary to accurately calculate the amount of welding material according to the structure and gap size of the parts, and use a suitable feeding method to ensure the accuracy of the amount. ​
In addition to parameter control, the surface treatment of parts before brazing also has an important impact on the welding quality. Impurities such as oil and oxides on the surface of parts will hinder the wetting and diffusion of filler materials, reducing the strength and reliability of welded joints. Therefore, before brazing, the surface of parts must be thoroughly cleaned and pretreated. Chemical cleaning, mechanical grinding and other methods can be used to remove surface impurities, so that the surface of parts presents a clean and flat state, creating conditions for a good combination of filler materials and parent materials during brazing. ​
In the actual production process of pole shoe manufacturing, the brazing process does not exist independently, but cooperates and synergizes with other manufacturing processes. Before brazing, parts need to undergo precision machining, such as turning, milling and other processes, to achieve the dimensional accuracy and shape accuracy required by the design. The quality of these preliminary processing processes directly affects the effect of brazing. If the error of the part processing size is too large, it will cause uneven gaps in the assembly of parts, affect the flow and distribution of filler materials, and thus affect the welding quality. After brazing, the pole shoe blanks need to undergo subsequent processing and treatment, such as surface treatment and heat treatment. Surface treatment can improve the corrosion resistance and conductivity of the pole shoe, while heat treatment can further improve the performance of the pole shoe material, eliminate the internal stress generated during welding, and improve the comprehensive performance of the pole shoe. ​
With the continuous advancement of science and technology, the brazing process is also continuously developing and innovating in the production of various pole shoes. The research and development and application of new filling materials have continuously improved the connection strength, corrosion resistance and other properties of brazing. The emergence of automated brazing equipment has greatly improved the accuracy and stability of the brazing process, reduced the impact of human factors on welding quality, and improved production efficiency and product consistency. At the same time, the application of simulation technology also provides strong support for the optimization of the brazing process. Through computer simulation, the brazing process under different process parameters can be simulated, the quality and performance of the welded joint can be predicted, potential problems can be discovered and optimized in advance, the number of process tests in actual production can be reduced, and the R&D and production costs can be reduced. ​
The continuous development of the brazing process is of great significance to the performance improvement and application expansion of various pole shoes. In the field of motors, pole shoes with better performance can further improve the operating efficiency and stability of motors, reduce energy consumption, and promote the development of motors in the direction of high efficiency, energy saving, and miniaturization. In terms of electromagnetic equipment, high-quality pole shoes can help enhance the magnetic field strength and accuracy of the equipment, improve the working efficiency of the equipment, and meet the growing demand for electromagnetic equipment performance in different industries. In sensors and measuring equipment, reliable pole shoes can improve the sensitivity and measurement accuracy of sensors, providing more accurate data support for scientific research, industrial production and other fields.