The accuracy of the contents of the mold contains four aspects: the dimensional accuracy, shape accuracy, position accuracy, the appearance of accuracy. As the mold on the working hours of the mold, the lower mold in two parts, so that more than four in accuracy between the die mutual positional accuracy is most important.
3. Precision molds for precision products, services, high-precision products must be guaranteed by a more high-precision molds, precision mold parts generally be higher precision than two or two.
Methods to improve the precision molds
1. Ensure the accuracy of mold processing equipment
2. Mold manufacturing precision parts
①. Precision mold material
Mold steel processing fine tolerances restraint standard template size 300X300 + thickness flatness within 0.005-0 ± 0.005300X500 + within 0.01-0 ± 0.01500X800 + within 0.01-0.01 ± 0.015800X1200 + 0.02-0.02 ± 0.02② . Precision mold parts require a. Spread mold precision parts using MISUMI guide pillar, guide sleeve series, ultra-fine tolerances can be restrained within 0.002mm.
b. Chong-pin edge molding using MISUMI standard material: SKD-11 Hardness: 60-62HRC edge shape: DREGTH red needles commonly used for forming a cylindrical bore or on the product. Chong-pin accuracy restraint ± 0.01mm, special requirements can be done about 2um, and keep the mirror of.
3. The size of the die gap is the main basis for mold design and manufacture of precision molds for the production of products ensure dimensional accuracy and shape position accuracy, and product quality (such as stamping section quality and burr height), you must ensure that the gap between the mold convex mold .
4. Accuracy of the mold structure requirements ①. Luo Baihui mold guarantee the accuracy of representation, from the perspective of machining and assembly, precision mold mainly includes the following aspects: a. On the next plane size of the template and the pilot hole locations consistency; b. Flatness template big plane and parallel; c. Perpendicularity of the plane with the guide hole; d. Template between the sides of adjacent vertical; e. With precision guide post and a guide bush.
Mold accuracy assurance methods are:
a. A processing method that after the completion of a large plane processing template, the upper and lower clamping together the template, once processed plane pilot hole size and the two templates.
b. The four guide holes in the middle of a deviation from the symmetrical position, to ensure that the orientation of the mold assembly.
c. Processing reference position (Datum), for the calibration process.
d. With high precision guide post, guide sleeve.
e. Improve the machining accuracy.
②. Punch accuracy guarantee that, from the perspective of machining and assembly, precision punch mainly consists of: a. Punch shape dimensional accuracy; b. Punch between the sides of adjacent vertical degrees.
③. Accuracy of the die from machining and assembly to ensure the angle of view, precision die mainly comprises: a. Die shape dimensional accuracy; b. Dies adjacent perpendicularity between the sides; c. Die on the side of the large vertical plane; d. The position of the die.
5. Precision molding process to ensure that the processing of the molding structure, whether it is the use of computer gongs, EDM, wire cutting or the ordinary milling machine, coordinate processing method are used. The accuracy depends on the machine to ensure the accuracy and operator calibration, points in accuracy. Believes that with the establishment of guidelines for product quality assurance and management system, the guiding ideology, as the concept of precision molds should also throughout the mold design and manufacturing process. To ensure the accuracy mold assembly dimension chain closed loop, involving mold manufacturing, outsourcing (including materials, standard parts) process and the mold assembly, test mode, inspection, packaging and transportation of the whole process, to spread the mold Accuracy of the key and the key factors that must be held in strict restraint and management.
