Technical requirements for the design and manufacture of automobile gages
1, the design of the car inspection tool (measurement bracket)
1.1 The design drawings of automobile gauges are usually drawn with 1:1. Under special circumstances, they are negotiated with *****.
1.2 The first piece of design drawings is the gauge description form. The description table includes: Part status, Checker status, Material, Schedule, Version number, Change record and other information.
1.3 Automobile gage design must be started after the approval of the plan by *******.
1.4 The inspection tool structure and function plan shall be jointly negotiated with the manufacturer of the inspection tool and shall be completed on the basis of product drawings. The draft plan shall serve as the basis for the design of the supplier's inspection tool.
The gage draft plan does not indicate the latest valid part status. It merely expresses the plan of future gages. The drawings of the currently valid parts for the design and manufacture of gages are authorized by the ******* product engineering department.
1.5 The design of the gage tool adopts computer CAD/CAM three-dimensional design. Its design source is:
- Latest status CAD data from ******** Product Engineering Department
- Drawings of the latest status parts from the ******** Product Engineering Department (including dimensioning, hole position accuracy and detailed description of RPS points)
- Approved technical changes
1.6 The position of the part to be tested on the gage shall, in principle, be the same as its position in the body coordinate system. Considering ergonomic principles such as ease of operation and cost-saving factors, it is allowed to rotate the part by +/-90 degrees or +/-180 degrees under special circumstances. However, it must be approved by ******* before execution.
1.7 Parts are normally secured to the gage with the use of insertable locating pins through two locating holes. The gage's locating surface, supporting surface and jaws are usually based on the product drawing RPS (short for German Referenzpunktsystem) The coordinate values of the points are arranged and installed. The RPS positioning (hole) surface and bearing surface are all assembled. Chucks must be digitally encoded in RPS order. If the part does not use the hole as the positioning, according to the RPS plane positioning, the size specification of the RPS plane is clearly defined on the product drawing.
1.8 Usually for those holes that have position tolerances on the product drawing with respect to the bodywork coordinate line and are marked with tolerance values within +/- 0.5, while requiring high precision (diameter tolerance value < +/-0.5) , Consider using inspection pin detection. Other bores with general functional requirements (with tolerances of +/- 0.5 mm, < +/- 1.0 mm, eg mounting holes) are usually checked visually. Wiring holes, process holes, drain holes, etc. (with tolerances >= +/- 1.0 mm) are usually visually inspected.
1.9 For parts that are symmetric about one another and are molded at the same time through the same die, the gages are usually separated from the body and the skeleton to share the structure of the base. The specific structure should be negotiated with the ********.
10 The inspector body together with the bottom plate must engrave the body coordinate line X-direction and Y-direction, Z-direction, and the body coordinate line starts from the X-, Y-, and Z-planes, and is every 100mm or 200mm. The file is engraved. Scribe depth and width are both 0.1.