How are microperforated metal pieces manufactured?

PTJ has introduced in detail how to make a continuous die cold extrusion micro deep drill.

How do you make a hole in a metal part with a relatively thin microhole? Only the hardness of the punch is required to be higher than the hardness of the material.
How do you make a metal part with fine holes that has a hole depth that is at least three times the diameter of the hole?

According to the laws of physics, the depth of the hole is more than three times the depth of the opening, so it’s very easy to break the punch.

Many engineers first create blanks and then CNC punched holes. This is fine but slow.

And if you can’t find it well, it’s not easy to find, you can make the holes different!
And the smaller the hole, the easier it is to break the knife.

If you come across a metal part with hundreds of thousands of micropores a month, there is little chance of mass production.

Is there a fast and good way to handle metal parts with fine holes?

The answer is yes!

PTJ invented a continuous die cold extrusion process that works by stamping a blank with a thick punch in the early stages. Then use cold extrusion on a continuous die to shrink the hole to the specified diameter.

In this way, the manufacturing speed of micro perforated metal parts can reach more than 160 per minute, the product tolerance can be controlled within ± 0.02 mm, and the efficiency is more than 50 times that of CNC machining.

Manufacture of micro-perforated metal parts is not an easy process, but it requires long-term research and development and technical input.

Many of the manufacturing details that need to be fixed in place to produce high-end products, such as annealing of various materials, lubrication, punch pin surface treatment, etc.

Almost every detail is in the engineering arena and you need to keep investing in research and development to find the best solution.