1, mold structure
The rationalization of the mold structure is to improve the upper limit of the mold load, reduce the mold to withstand the level of thermo-mechanical load. For example, the guide design of the mold, for the avoidance of mutual gnawing between the convex and concave mold is helpful. Another example is that cold heading and cold extrusion molds, which are subjected to high intensity loads, are very sensitive to stress concentration When the cross-sectional dimensions of the load-bearing parts change, they are most likely to crack due to stress concentration. Therefore, the cross-section size change processing is reasonable or not will directly lead to the mold's service life.
2, mold materials
Note that the quality of the mold material may cause defects in the processing technology and the impact of the work of the bearing capacity, to take the necessary measures to make up for the lack of metallurgical quality in order to improve the life of the mold.
3, mold processing quality
Parts in the processing and pretreatment, forging, quenching and hardening, defects in the surface treatment will have a significant impact on the mold's abrasion resistance, resistance to occlusion, resistance to fracture. For example, the mold surface roughness, residual cutter marks, EDM micro-cracks, heat treatment of the surface layer of carbonization and decarburization and other defects will have an impact on the mold's load-bearing capacity and life.
4, mold working condition
mold work, the use of equipment, precision and rigidity, lubrication conditions, the pre-treatment of the material being processed state, mold preheating and cooling conditions will have an impact on the mold life. For example, the precision punching of thin material is particularly sensitive to the precision and stiffness of the press, and it is necessary to select a high-precision and high-stiffness press to obtain good results.
5, product parts condition
The surface quality of the processed parts material state, material hardness, elongation and other mechanical properties, the dimensional accuracy of the processed parts have a direct relationship to the mold life. Such as nickel mass fraction of 80% of the special alloy molding is very easy and mold work surface occurs strong bite phenomenon, so that the work surface of the bite pull hair, directly affecting the mold can work properly.
Two, how to maintain the bending machine mold
1, production attention to corrosion and rust
According to statistics, the bending machine mold development industry in the loss of corrosion problems accounted for the loss of the amount of production enterprise gross output value of 7.2% or so, the metal corrosion brought about by the direct and indirect factors affecting us can not avoid ignoring. Bending machine research mold production with anti-corrosion and rust role can not be avoided to ignore, specifically in sheet metal processing production of protection, rust treatment work to put forward new requirements. Bending machine mold is a sheet metal processing in the necessary technology products, sheet metal processing enterprises to enhance the industry must also be through high-quality bending machine mold design products.
2, the bending machine on the hydraulic oil circuit maintenance
To do every week to check the oil level of the oil tank, only the oil level to maintain normal, the normal operation of the machinery, once the oil level fell, we must add in a timely manner. These oil replacement, pay attention to the cooling before the replacement process.
For the replacement of hydraulic oil time, to master in about two thousand hours, of course, this refers to the beginning of the replacement time, after the replacement of hydraulic oil time to master in about five thousand hours. Every time you change the hydraulic oil, pay attention to the oil tank to do a good job cleaning, to avoid the presence of some debris.
3, for the maintenance of the filter
Sheet bending machine molds should be done every time the oil change, the filter should be replaced, if not replaced, the filter should be cleaned.
Each bending machine is equipped with an alarm device, when the oil is not clean after the alarm, it shows that there are problems with the filter, it is time to carry out the replacement of the filter.
Sheet bending machine molds used on the air filter, to do every three months to check, do a good job of cleaning, use about a year to be replaced.