What are the requirements of die steel dimension and manufacturing tolerance? Paying attention to the reasonable tolerance and dimension requirements of die steel materials can bring convenience to die making, improve economic efficiency and reduce waste products during manufacturing. No matter what kind of material, the higher precision dimension of plastic parts is required, so what are the requirements of die steel dimension and manufacturing tolerance? Jinan die steel Xiaobian below to tell you.

模具钢的尺寸：

Dimensions of die steel:

根据塑料△VS值，将各种塑料的收缩特性分为4个组。△VS值小的组是高精度组，以此类推，△VS值的组为低精度组。 并按照基本尺寸编制了精密技术、110、120、130、140、150和160公差组。并规定，用收缩特性稳定的塑料成形塑件的尺寸公差可选用110、120和130组。用收缩特性中等稳定的塑料成形塑件的尺寸公差选用120、130和140。如果用这类塑料成形塑件的尺寸公差选用110组时，即可能出大量尺寸超差塑件。用收缩特性较差的塑料成形塑件的尺寸公差选用130、140和150组。

According to the △ vs value of plastics, the shrinkage characteristics of various plastics were divided into four groups. The group with small value of △ vs is high precision group, and so on, the group with low value of △ vs is low precision group. According to the basic dimensions, the tolerance groups of precision technology, 110, 120, 130, 140, 150 and 160 are compiled. It is stipulated that the dimensional tolerances of plastic parts formed with the most stable shrinkage characteristics can be 110, 120 and 130 groups. The dimensional tolerances of plastic parts formed with moderately stable shrinkage characteristics are 120, 130 and 140. If 110 sets of tolerances are selected for forming plastic parts with this kind of plastics, a large number of plastic parts with out of tolerance can be produced. The dimensional tolerances of plastic parts formed by plastics with poor shrinkage characteristics are 130, 140 and 150 groups.

模具型腔和型芯的加工尺寸除了通过D=M(1+S)公式计算基本尺寸之外，还有一个加工公差的问题。按照惯例，模具的加工公差为塑件公差的1/3。但由於塑料收缩率范围和稳定性各有差异，必须合理化确定不同塑料所成形塑件的尺寸公差。即由收缩率范围较大或收缩率稳定较差塑料成形塑件的尺寸公差应取得大一些。

In addition to calculating the basic dimension by D = m (1 + s) formula, there is also the problem of machining tolerance. According to convention, the processing tolerance of the mold is 1 / 3 of the plastic part tolerance. However, due to the differences in the range of shrinkage and stability of plastics, it is necessary to rationally determine the dimensional tolerance of plastic parts formed by different plastics. That is to say, the dimensional tolerance of plastic parts formed by large shrinkage range or poor shrinkage stability should be larger.

否则就可能出现大量尺寸超差的废品。为此，各国对塑料件的尺寸公差专门制订了标准或行业标准。也曾制订了部级标准。但大都无相应的模具型腔的尺寸公差。德国标准中专门制订了塑件尺寸公差的DIN16901标准及相应的模具型腔尺寸公差的DIN16749标准。此标准在世界上具有较大的影响，因而可供塑料模具行业参考。

Otherwise, there may be a large number of oversized waste products. For this reason, countries have specially formulated national standards or industry standards for the dimensional tolerance of plastic parts. China has also formulated professional standards at the ministerial level. But most of them have no corresponding dimensional tolerance of die cavity. In German national standard, din16901 standard and din16749 standard of die cavity dimension tolerance are specially formulated. This standard has great influence in the world, so it can be used as a reference for plastic mold industry.

模具钢的制造公差：

Manufacturing tolerance of die steel:

不论何种材料的塑件，其中不注明尺寸公差尺寸的模具制造公差均使用序号1的公差。具体公差值由基本尺寸范围确定。不论何种材料塑件中等精度尺寸的模具制造公差为序号2的公差。不论何种材料塑件较高精度尺寸的模具制造公差为序号3的公差。精密技术相应的模具制造公差为序号4的公差。

No matter what kind of material plastic parts, which do not indicate the size tolerance of the mold manufacturing tolerance are using the number 1 tolerance. The specific tolerance value is determined by the basic dimension range. No matter what kind of material, the mold manufacturing tolerance of medium precision size of plastic parts is the tolerance of serial number 2. No matter what kind of material, the mold manufacturing tolerance of higher precision dimension is the tolerance of serial number 3. The manufacturing tolerance of precision technology is the tolerance of serial number 4.

综上所述，模具钢尺寸与制造公差是由基本尺寸范围确定，合理的确定各种模具钢材料的尺寸与制造公差是非常重要的。以上就是关于模具钢的内容，相信大家已有所了解，更多相关内容可以阅读https://www.jnqhmj.com

To sum up, the size and manufacturing tolerance of die steel are determined by the basic size range. It is very important to determine the size and manufacturing tolerance of various die steel materials reasonably. The above is about the content of die steel, I believe you have some understanding, more related content can be read https://www.jnqhmj.com