The specific meaning and impact of high-speed punch press accuracy

Many customers in the procurement of punching machines, will ask us punching machine marked JIS first-class accuracy standards in the end what kind of meaning, the specific test is what items, is not the actual stamping production accuracy? In response to this question, we are here to give our customers a detailed answer:
　　In the high-speed press stamping production, the precision of the press is very important. The accuracy of the press directly affects the accuracy of the finished stamping product and the life of the mould. The accuracy of the press is actually divided into the static accuracy when the press is not loaded and the dynamic accuracy when it is loaded (for stamping). The dynamic accuracy of the high-speed press is very important in the actual stamping production. Due to the usage of the press, the actual load varies a lot, so it is technically difficult to formulate specifications, so it has not yet been integrated and formulated, and the status quo is to use the static accuracy to represent the accuracy of the press.
　　Punching machine uses a set of moulds, which are required to carry out correct relational movements during processing operations. The correct relational motion of the press is the precision of the press, and the actual precision of the press is mainly reflected in: first, parallelism, second, perpendicularity, and third, total clearance. Incorrect relational motion of the die, in addition to reducing the accuracy of the product and shortening the life of the die, will also lead to the die is not easy to assemble, can not use the precision of the die, and will produce intense vibration noise.

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　　Japan JIS B6402 (CNS 3157 B 7045) stipulates the following static accuracy test items for presses:
　　1. Straightness between the top of the press table and the bottom of the slide.
　　2. Parallelism between the underside of the slide and the top of the table.
　　3. The perpendicularity between the up and down movement of the slide and the top of the table.
　　4. The straightness between the hole of the die shank and the bottom of the slide.
　　5.The total clearance between the upper and lower part of the linkage.
　　Each of our punching machines will be strictly inspected for accuracy before leaving the factory, and the punching machine accuracy inspection table is attached for customers to check.
　　Punching Machine Accuracy Grade
Grade Accuracy Usage
Special grade Precision punching of thin veneer, punching of special parts.
Grade 1 Excellent Accuracy Punching of veneer, high speed punching, precision punching.
2 Good accuracy General punching, drawing, forming, embossing
3 Fair accuracy General stamping operations

High Speed Punching Machine

　　Influence of press accuracy on stamped products
　　In modern stamping operations, high precision stamping processes cannot be realised if there are only high-precision, long-life moulds, but no high-precision presses and high-quality stamping materials to match. The precision and rigidity of the press have a great influence on the life of the moulds, and the same pair of moulds shows different performance and service life in different precision presses. For example, in the general precision press, the use of tens of thousands of times will produce the chipping edge, while in the special precision high-speed press, the chipping edge phenomenon will only occur after more than one million times.
　　Dynamic accuracy is directly related to the rigidity of each part of the press, and the dynamic accuracy of the press with good rigidity is relatively high.
　　If the press is loaded, the structure and other pressurised parts will be deformed. Therefore, the static accuracy will deteriorate, that is to say, the dynamic accuracy is the real accuracy.
　　There is a very close correlation between the accuracy of the press and the accuracy of the product and the life of the mould.
　　Dynamic accuracy is directly related to the rigidity of each part of the press, and a press with good rigidity has relatively high dynamic accuracy.
　　Dynamic accuracy, which is very important in the actual stamping process, has not yet been integrated and formulated due to technical difficulties in formulating specifications, and the status quo is to use static accuracy to represent the accuracy of the press.

High Speed Punching Machine