(2) The manufacturing, processing and testing cycle of the gage sliding mechanism is long, which leads to project delay. Traditionally, the processing and manufacturing of inspection tools use lathes, milling machines, wire cutting, and fitter assembly is also required. Although the use of 3-axis and 5-axis CNC machining centers can shorten the processing cycle, the cycle of manual assembly by fitters, adjustment of assembly accuracy, and three-coordinate detection is still relatively long.

Modular and serialized design is conducive to shortening the project cycle of inspection tools

The sliding mechanism of the checking fixture is composed of the bottom plate of the fixture, the supporting structure, and the positioning mechanism. In addition, similar products of the same OEM are basically the same, and the shape of the detection module is similar. The detection mechanism of different OEMs is not much different, which has the precondition of modularization. Therefore, the modular design concept can also be adopted in the design of the fixture, and the single-order design can be replaced by a modular design to reduce the development cycle.

In the application of the modular design of the gage sliding mechanism, the modules can be serialized according to different sizes and specifications, and a database of serialized specifications can be established. It can be directly selected from the database to shorten the cycle. When the database is established, the company's internal general database can be used, or a market-oriented standard industry database, that is, a special fixture module provided by a professional fixture manufacturing company.

At present, my country's automobile inspection tool market has formed a standardized module system. Professional companies provide standardized standard databases and standardized parts such as horizontal turning mechanism, turning mechanism, sliding mechanism, positioning pin, clamping mechanism, detection clamping mechanism, guide pin, guide sleeve, etc., for the modularization and serialization of auto parts inspection tools Design provides technical support.

The parameterization of the fixture design platform is conducive to shortening the project cycle of the fixture

The design of the gage sliding mechanism adopts parametric design. The design structure of the whole vehicle and parts of the same OEM is continuous, and different models and modifications generally adopt the same or similar structural design mode. In the fixture design process, the fixture design library of the vehicle parts module is established, and the fixture data of the platform vehicle module is parameterized. When designing similar products, using the original surface to replace and refresh the original sheet metal data or structural data can quickly realize the modular design of the fixture, and the NC machining program of the corresponding machining center can also improve the design through a similar refresh programming method efficiency.