Introduction of terminal cross-section analysis

Cross-section analysis is a more accurate and comprehensive detection method.

At first, it is mainly used to detect the crimping quality of automobile wire harness. With the continuous improvement of terminal crimping quality requirements, more and more customers in different fields have adopted cross-section testing, which has become a trend.

The section diagram can be used as an advanced analysis method to further identify the crimping condition.

The section should be used as a reference for comparison with future sections.

When making the reference diagram, a new applicator should be used for crimping, so as to avoid incorrect reference diagram.

Before making any cross-section, you must make sure that the terminal crimping meets the requirements of the application specification.

When the application specification does not exist, the information provided with the application tool shall prevail.

The main steps of making cross section: cutting, polishing, etching, photography, analysis.

Note:

The section must be perpendicular to the crimped X and Y axes, as shown in figure 3, and figure 4 shows an angled section.

The cross section must be cut at the part where the crimping height is measured.

The following illustration provides an example of a section view cut through a serrated groove.

The cross-section must be properly polished and etched.

The following figure provides examples of incorrect polishing and etching.

HH-300M Semi-auto Terminal Cross-section Analyzing Machine

Description of crimping tool in section view

A change in feed or feed length can lead to a protuberance.

Note: Although terminal vane symmetry is ideal, such a situation is acceptable.

Because the terminal is easy to uneven after leaving the guide plate, asymmetry usually occurs in the end-feed terminals.

The misalignment of the tool will lead to a change in the crimping shape.

Common changes include noteworthy protuberance that do not show anvil damage and irregular curves produced by crimping contours.

A damaged anvil can lead to too large protuberance.

One way to identify the damage of the anvil is the lack of a clear platform at the bottom corner of the crimping contours.

The damage of the anvil will also lead to cracks in the bottom corner of the crimping.

The collision of the crimping blades and the anvils will damage both.

HH-300Z Automatic Terminal Cross-section Analyzing Machine

Description of general section characteristics

The following figure is an example of a properly crimped cross-section.

The wire is deformed, the terminal wing is symmetrical, and the bottom blades(anvils) platform is visible.

The following figure shows the crimping of the wing on one side of the terminal reaching the bottom.

This status is acceptable when other crimping parameters meet the requirements.

The following figure shows how both wings of the terminal touch the side.

There is a wire strand wrapped in the upper left wing, but it is completely deformed.

This status is acceptable when other crimping parameters meet the requirements.

Successful crimping depends on the adhesion between the wire strands, and the adhesion between the wire strands and the terminal body. And the hole is acceptable.

HH-300Q  Portable Terminal Cross-section Analyzing Machine