1. Try cutting method
In addition to accounting method, try cutting method is also a simple way to determine die cutting pressure, it is the practice of using experimental process to determine some box die cutting pressure. This approach can be very helpful in determining the pressure on commodities that are first processed. Try to cut according to the experience of the operator, the new processing of goods for the measurement of die-cutting pressure, in finding a reference, gradually add die-cutting pressure, until the die-cutting sample die tangent 2/3 is blocked, this process is called the initial pressure. After the initial pressure is determined to be able to according to the characteristics of pressure data 3 ~ 5t pressure, in more than 90% of the steel knife and steel line to achieve normal die-cutting, then by 0.1 ~ 0.3t pressure, until the die-cutting box can be normal separation, this process is called fine pressure.
This method is time-consuming, energy consumption, the need for the operator is very high, if the initial pressure pressure is too simple to form die-cutting plate damage, if the pressure is too small demand repeated experiments to reach the rating, and then reduce the production power. However, once a reasonable pressure value is obtained, it is of great reference value for future reprocessing, and it is likely to be recorded one by one for the next time. But with the die-cutting version of the wear degree is not the same, there is a line pressure change, resulting in the change of the value of the practice die-cutting pressure, generally to continue to mark the practice die-cutting pressure to meet the future use.
2. Theoretical accounting method
Automatic die-cutting machine pressure converted to line pressure, the pressure value and the total length of the steel knife and steel wire, die-cutting machine with line pressure and pressure data characteristics. The current general accounting formula is:
P = K * L * F
P-die cutting pressure (N)
K- correction coefficient (generally 1.3)
L- total length of steel knife or wire on die cutting plate (mm)
F- steel knife or steel wire used for wire pressing (N/mm)
But in practice production, because the information and the environment is not the same resulting in data tightness, thickness, fiber direction and other physical parameters are different, die-cutting pressure will change; In addition, because the change of processing conditions will cause the wear of steel knife and steel wire, the existing line pressure of steel knife and steel wire will be changed, and it has been acquiesce in the operation of steel knife and steel wire under the condition of good line pressure value, which leads to the error of theoretical accounting value. In addition, because the die cutting plate production process caused by the die cutting plate is not complete level, bridge height machining accuracy error caused by the steel knife and steel wire installation height is not the same as the formula reduced the practical application performance. Therefore, the formula can not be used for all die-cutting pressure.
However, the formula for the new production task processing process still has a very important guiding significance, play a role in saving printing and maintenance of die-cutting plate effect. The formula is of great practical value is the first pressure reasonable size of the conclusion, before the use of new die-cutting version, according to the formula required parameter value of the calculation of the die-cutting version of the first use of acceptable reasonable theoretical pressure, but not die-cutting version of the reasonable practical pressure. This formula can be seen, die cutting pressure measurement and pressure is mainly through the correction coefficient to balance, but every time the same correction coefficient will cause pressure data change caused by the difference.
How to set the pressure of die-cutting machine
2021 04/02