With the continuous progress of science and technology and the continuous improvement of people's living standards, people's demand for automobiles is also increasing. The article takes the final inspection of the upper right cover of the side member of a certain model as an example to introduce the three-coordinate measurement method and steps of the stamping part inspection tool.
????The times are developing, and people's demand for automobiles is increasing. In order to adapt to the needs of the market, automobile manufacturers continue to develop their new products. The birth of a new model, its production, and its final release to the market are a complex process. Many new inspection tools need to be produced. Therefore, the final inspection of the inspection tools is very important. Inspection of two parts, three-coordinate measurement provides an important quality guarantee for the accuracy of the inspection fixture.
Take a high-speed movable bridge measuring machine (model: TYPHOON) as an example. The measurement range is 3300 × 1500 × 1300 (MM), the measurement accuracy is (23.0 + 16.0L / 1000) μm, and L is the length of the measuring block.
Gage is the abbreviation of on-line inspection tools for stamped parts, injection molded parts and other product parts. It is a testing tool specially manufactured according to the specific requirements of the demander. The main function of the check fixture is to detect the workpiece. The accuracy of the check fixture acceptance is usually required. Generally, the positioning hole has the highest accuracy, about ± 0.05mm, and the accuracy of the measuring machine is about 0.03mm.
2. The main content of the three-dimensional measuring fixture
Taking stamping parts inspection tool as an example, as a tool for inspecting stamping parts, the inspection tool must have the function of inspecting holes, profiles, and trimming, and these aspects are also the contents that need to be detected in coordinate measurement.
The holes are divided into positioning holes and mounting holes. The function of the positioning holes is to cooperate with the positioning pins of the fixture to fix the stamped parts on the fixture. The role of the mounting holes is to cooperate with the marking pins of the fixture to check the hole position and Aperture, positioning hole is usually sunken. Tolerance requirements are ± 0.05mm and ± 0.1mm, respectively.
2.2 Clamping block
The position of the clamping block corresponds to the RPS point of the stamped part. The stamped part is clamped and fixed in cooperation with the press pliers, and the tolerance requirement is ± 0.1mm.
The molding surface is divided into zero plane and three / fifth plane. The zero plane is the distance from the stamping part is 0mm, and the third / fifth plane is the distance from the stamping part.
3 / 5mm, tolerance requirements are ± 0.2mm.