The materials used to make automotive checking fixtures are diverse, including aluminum, resin, iron, carbon fiber, silicone, etc. Aluminum has high strength and corrosion resistance, resin has good elasticity and wear resistance, and iron also has its applicable scenarios; carbon fiber can increase strength and rigidity, and silicone is used in specific expansion joints. Different materials have their own characteristics, and manufacturers need to weigh and select appropriate materials based on the specific application scenarios, usage environment and needs of the checking fixture.

As a material for making automotive checking fixtures, aluminum has outstanding performance advantages. It has high rigidity and can provide a stable and reliable support structure for the checking fixture, ensuring that the precise shape and size are maintained during the inspection process. Moreover, the production cost is relatively low, which can effectively control costs for manufacturers who mass-produce automotive checking fixtures. However, aluminum also has certain limitations. Its expansion coefficient is large, and it is easy to change its size under different temperature environments, resulting in reduced accuracy during operation. Long-term frequent use may also cause metal fatigue, affecting the service life of the checking fixture. Despite this, in some occasions where the accuracy requirements are not extremely high and the usage environment is relatively stable, aluminum is still a commonly used material for making checking fixtures.

Resin materials also play an important role in the production of automotive checking fixtures. It has high elasticity, which enables the checking fixture to better fit the surface of the parts when it contacts and detects the automotive parts, and obtain more accurate test data. At the same time, the resin has good wear resistance and can withstand a certain degree of friction and loss, ensuring that the checking fixture can still maintain stable performance after repeated use. Due to its good processing performance, manufacturers can easily process resin materials into checking fixtures of various shapes and structures according to complex design requirements to meet diverse testing needs.

Iron parts are also one of the optional materials for the production of automotive checking fixtures. Iron parts have high hardness and strength, can withstand large external forces without deformation, and are suitable for some testing scenarios that require high load-bearing capacity of checking fixtures. It has relatively low cost and abundant resources. Under certain specific conditions, it is an economical choice. However, iron parts are prone to rust and corrosion, which requires protective measures to be taken during use to extend their service life.

Although carbon fiber materials are expensive, they also have unique applications in the production of automotive checking fixtures due to their excellent performance. It can significantly increase the strength and rigidity of the checking fixture, while being relatively light in weight, which is particularly important for some checking fixtures that require high precision and weight. For example, in the inspection of parts of some high-end cars, the checking fixture made of carbon fiber materials can improve the operating efficiency of the inspection equipment while ensuring the inspection accuracy.

Silicone is mainly used in automobile checking fixtures with expansion joints. As a flexible material filled in the expansion joint, silicone has good flexibility and sealing properties. It can play a role of buffering and sealing when the checking fixture expands and contracts due to temperature changes or other factors, ensuring the normal use and inspection accuracy of the checking fixture.

In summary, various materials for making automobile checking fixtures have their unique performance characteristics and scope of application. When selecting materials, manufacturers need to comprehensively consider the specific purpose, use environment, cost budget, and requirements for precision, strength, etc. of the checking fixture. By weighing the pros and cons, they can choose the most suitable material to make the automobile checking fixture to ensure that the checking fixture can efficiently and accurately complete the inspection task of automobile parts, providing a strong guarantee for the quality control of automobile manufacturing.