In the ever-evolving world of manufacturing and fabrication, the precision of the punch feeder, a distinctive advantage, often outshines the old-fashioned manual feeding method. Rigorous testing of the punch feeder’s capabilities upon its installation on the punch press, more specifically its feeding step, ensures its reliable and unwavering performance. The following paragraphs shed light on three distinct methodologies for testing punch feeder performance.

Understanding the Root Cause of Inaccuracy

Recognizing the sources of potential inaccuracies in the punch feeder’s feeding step is crucial. It could stem from the punch feeder itself, the mold, or even external variables. As such, a thorough evaluation is necessary, requiring tests to be performed both in the absence and presence of mold installation.

Test Methodologies: No Mold Installation

Single Punch Processing Test

Contrarily to the application with high-speed roller feeders, this methodology is mainly used without mold installation. The process starts by adjusting the feeding step, followed by operating the punch press individually, marking the position once after feeding. Ten individual feeds are executed, the material strip is cut, and the values from these feeds are analyzed to ascertain the precision of the punch feeder step. This method is unsuitable for high-speed roller feeders as they depend on the punch output shaft, which inherently has a gap. This can result in instability with a single feed.

Multiple Punch Processing Test

This universal method applies to all punch feeder devices and includes adjusting the feeding step, marking the material before the first feed, and making a second mark after ten consecutive punches. The material returns to the initial mark, ten more feeds are executed, and a final, third mark is made. The difference between the last two marks determines the feeder’s accuracy. If the gap falls within the feeder’s precision range, the feed is considered accurate. If it surpasses that range, it’s deemed inaccurate.

Test Methodology: Post-Mold Installation

Post-mold installation, the precision requirements of the product are examined after multiple feeds. Commonly, a combination of methods 1 and 3 or 2 and 3 are implemented to assess the feeding step. If methods 1 and 2 prove accurate while method 3 does not, it points to a potential issue with the mold. Conversely, if all three methods show inaccuracy, the punch feeder may need investigation for possible problems like air source and feeding relaxation angle issues.

Our team stands ready to offer expert advice if a customer finds it challenging to pinpoint the issue.

In conclusion, the superior precision of the punch feeder makes it a valuable asset in manufacturing and fabrication processes. With rigorous testing and understanding the root causes of inaccuracies, businesses can ensure their operations run smoothly, efficiently, and with utmost precision.

punch feeder
punch feeder