When purchasing presses, many customers always ask what is the meaning of Japanese JIS first-class accuracy scale marked on the punch, what items are inspected in detail, and whether the accuracy of actual stamping production is? For this question, please explain it to our customers in detail
The accuracy of punch is very important in the production of high-speed punch. The accuracy of punch directly affects the accuracy of stamping products and die life. The accuracy of punch is divided into static accuracy when the press will not be loaded and dynamic accuracy when loading (holding stamping). The dynamic precision is very important in the actual stamping production of high-speed punch. Because of the main purpose of the punch, the actual loading capacity is very large. Therefore, it is difficult to determine the scale. Therefore, it is not integrated. At present, the static precision represents the accuracy of the punch.
Punch is the use of a set of molds, which is necessary to carry out accurate related activities when doing business. The accurate associated range of the punch is the accuracy of the punch. The actual key performance of the accuracy of the punch is now: 1. Parallelism; 2. Perpendicularity; 3. Total clearance. In addition to the precision of the products and the life span of the mold, it will not be easy for the mold to be equipped. It can not be better to use the fine mold, and it will create strong vibration noise.
Japan jisb6402 (cns3157b7045) divides the new items of punch static accuracy testing as follows:
The straightness of table top and bottom
2. Parallelism between the lower edge of the slider and the upper edge of the table
Verticality of the upper and lower sides of the sliding table
4. The straight angle of the handle hole and the lower edge of the slider
5. Keep the comprehensive gap between the upper and lower parts
Harm of punch accuracy to stamping products
In today's stamping work, if there are only high-precision and long-life dies, and there is no high-precision punch and high-quality stamping materials, it is impossible to complete the high-precision stamping process. The accuracy and stiffness of punch press have great harm to the die life. The same die mainly shows the characteristics and service life of the punch with different precision. For example, on a punch with the same general precision, a few tens of thousands of times is used to create a broken edge, while on a high-speed punch with special precision, it is only after more than 1 million times that there is a sign of breaking edge.
The dynamic accuracy is directly related to the stiffness of each unit of the punch, and the dynamic accuracy relativity of the punch with good stiffness is higher.
If there is a load on the punch, the layout and other stress structure will be deformed. As a result, the static accuracy will deteriorate, so it can be said that the dynamic accuracy is more real precision.
There is a close relationship between the accuracy of punch and the precision of product and the life of die.
The relative accuracy of each unit is higher than that of the dynamic stiffness of the press.
The dynamic precision is very important in actual stamping production and processing, because it is difficult to set the scale in skill, so it is not integrated. At present, the static precision represents the accuracy of punch.