How do auto parts manufacturers customize suitable product inspection tools?

The core of customizing product inspection tools for automobile parts manufacturers is to promote the customization process in stages based on the requirements of parts drawings and combined with the requirements of production batch, inspection efficiency and accuracy. In this process, it is necessary to ensure that the fixture can accurately match the characteristics of the parts, and at the same time take into account the actual use scenarios.

First, clear the core basis of customization

Before starting customization, the key technical indicators must be locked to avoid the disconnection between the fixture and the demand.

Thoroughly understand the drawings of parts: extract the key dimensions, form and position tolerances (such as parallelism and coaxiality), surface accuracy and other requirements in the drawings, which are the core benchmarks of fixture design.

Confirm the inspection scene: make clear whether the inspection fixture is used for batch self-inspection in production line (fast and efficient) or final inspection in laboratory (high precision). Different scenes will affect the structural design of the inspection fixture.

Statistics of production batch: general inspection tools (such as caliper and micrometer combination) can be selected for small batch parts, and special inspection tools (such as tooling inspection tools) are required for large batch parts to improve inspection efficiency.

Second, choose the appropriate fixture type

The applicable scenes of different types of fixtures are quite different, which need to be matched according to the characteristics of parts and testing requirements.

The core characteristics of the fixture type are applicable to the scene.

Special inspection tools have strong pertinence, fast detection speed, mass production and complex structure parts (such as engine cylinder block)

The universal checking fixture has high flexibility and low cost, small batch production and simple parts (such as bolts and gaskets).

Automatic inspection tools can integrate data acquisition, unmanned high-precision requirements and super-large batch production (such as automobile chassis parts)

Third, follow the standardized customization process

Standardized process can ensure the quality of checking fixture and avoid repeated modification.

Demand docking: make clear the information such as parts drawings, detection accuracy and use frequency with the inspection tool supplier, and form a written technical agreement.

Scheme design and review: the supplier shall issue the design scheme of the checking fixture (including structure, material and testing method), and the manufacturer shall jointly review with the technical, production and quality inspection departments, with emphasis on confirming whether all key testing items can be covered.

Prototype manufacturing and verification: After the supplier manufactures the first fixture, the manufacturer needs to test it with standard parts or qualified parts to verify the accuracy and stability of the fixture. If it is unqualified, it is required to modify it.

Mass production and acceptance: after the verification is passed, the supplier will mass produce the inspection tools, and the manufacturer will conduct final acceptance according to the technical agreement, including dimensional calibration and functional test.

Fourth, management and maintenance after customization

The service life and precision stability of the checking fixture depend on the subsequent standardized management.

Periodic calibration: according to the frequency of use (for example, the checking fixture used every day is calibrated once a month), entrust a third party or an internal laboratory for calibration to ensure that the accuracy does not deviate.

Daily maintenance: after use, clean the surface of the inspection tool (especially the measuring contact surface) in time to avoid the influence of oil stain and iron filings on the test results; Special brackets or packing boxes are required for storage to prevent bumping and deformation.

Version update: If the part drawings are iterative, it is necessary to update the fixture synchronously, or mark "The old version fixture is only applicable to the corresponding batch of parts" to avoid mixing.