Steel Rivet Cold Heading Punch for Connector Parts

This Steel Rivet Cold Heading Punch For Connector Parts from Qimao Metal Manufacturer is designed specifically for forming steel rivets used in electronic and automotive connector assemblies. The working end is precision ground with controlled surface finish to reduce friction and sticking during high-speed ejection.

We maintain strict concentricity between the punch head and shank, which directly affects rivet head symmetry and shank straightness. The relief angles are cut based on your rivet print, not a generic drawing.

Material selection follows cold work tool steel grades with balanced carbide distribution. Hardness is kept within a narrow HRC window — not too hard to chip, not too soft to mushroom. Each batch is sample-tested on a cold header using your rivet dimensions before packing.

Product Parameter (Specification)

Product Feature

• The Steel Rivet Cold Heading Punch For Connector Parts working tip is ground after heat treatment, not before — this keeps dimensional stability and avoids soft surface layers that wear fast on steel rivets

• No hidden center hole or weak section — many punches crack from internal stress risers; our design keeps a solid cross-section where impact load concentrates

• Each punch is sample tested on a real cold header using your steel rivet wire diameter, not just optical inspection

• Edge radius on the punch tip is controlled to avoid premature cracking while still allowing clean rivet head separation

• For high-strength steel rivets, we adjust the punch material to a tougher grade with finer carbide distribution

• No nickel or sulfur in surface treatment — some coatings cause hydrogen embrittlement on small-diameter rivet punches; we avoid unnecessary surface chemistry

Application

• High-speed connector terminal assembly

Where The Steel Rivet Cold Heading Punch For Connector Parts are cold headed directly into copper or brass connector bodies — the punch must maintain concentricity to avoid damaging the connector housing

• Battery terminal rivets for commercial vehicles

Steel rivets with larger head diameter require a punch that spreads material evenly without cold shuts or surface folds

• Appliance switch and socket connector rivets

Medium-volume production where tooling changeover is frequent; our punch shank design allows quick swap without re-aligning the tool holder

• Aftermarket replacement for worn or cracked original punches

Many connector plants keep our punch as a direct fit spare — same shank length, same tip geometry, no machine adjustment needed

• Steel rivets with non-standard head marking or logo

We can engrave or form a simple raised mark on the punch tip so your rivet head carries a brand or position identifier

• Rivets with countersunk or flat-head profile for flush assembly

The punch tip angle and edge sharpness are adjusted to avoid tearing the rivet head skin during forming

• Export replacement tooling for European/Japanese cold headers

We hold common shank dimensions matching major brands, so you don’t have to modify your tool holder

Production Details

This The Steel Rivet Cold Heading Punch For Connector Parts is made from high-grade cold work tool steel heat treated. The working face is ground after heat treatment to maintain dimensional stability. Surface finish is held to Ra 0.2µm or better to reduce friction and sticking during high-speed ejection.

Concentricity between punch head and shank is kept within 0.01mm TIR. Relief angles are cut based on your rivet print — no generic angles that cause galling.

Each punch is sample tested on an actual cold header using your steel rivet wire diameter before shipping. We mark every punch with batch number and keep samples for 12 months.