注意冷作模具钢材料的合理公差和尺寸要求，能给模具制作带来便利，提高经济效率，减少制造时的废品，无论何种材料塑件较高精度尺寸都是有要求的，那么冷作模具钢尺寸与制造公差有什么要求呢？

Pay attention to the reasonable tolerance and dimensional requirements of cold work die steel materials, which can bring convenience to die manufacturing, improve economic efficiency, and reduce waste products during manufacturing. No matter what materials and plastic parts have higher precision dimensions, what are the requirements for the dimension and manufacturing tolerance of cold work die steel?

冷作模具钢的尺寸：

Dimensions of cold work 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值大的组为低精度组。

According to the △ vs value of plastics, the shrinkage characteristics of various plastics are divided into four groups. The group with small △ vs value is a high-precision group, and by analogy, the group with large △ vs value is a low-precision group.

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。

And the precision technology, 110, 120, 130, 140, 150 and 160 tolerance groups are compiled according to the basic dimensions. It is also specified that 110, 120 and 130 groups can be selected for the dimensional tolerance of plastic parts formed with plastics with stable shrinkage characteristics.

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。

120, 130 and 140 are selected as the dimensional tolerances of plastic parts formed from plastics with moderate and stable shrinkage characteristics. If the dimensional tolerance of plastic parts formed with this kind of plastic is 110 groups, a large number of plastic parts with out of tolerance can be produced. The dimensional tolerance of plastic parts formed with plastic with poor shrinkage characteristics is 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，先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。否则就可能出现大量尺寸超差的废品。

In addition to the basic dimensions calculated by D = m (1 + s) formula, there is also a problem of machining tolerance for the machining dimensions of mold cavity and core. According to the Convention, the machining tolerance of the mold is 1 / 3 of the tolerance of the plastic part. However, due to the differences in the shrinkage range and stability of plastics, it is necessary to rationalize the dimensional tolerance of plastic parts formed by different plastics. That is to say, the dimensional tolerance of plastic parts formed from plastics with large shrinkage range or poor shrinkage stability should be larger. Otherwise, a large number of waste products with out of tolerance may occur.

冷作模具钢的制造公差：

Manufacturing tolerance of cold work die steel:

德国标准针对塑件公差制订了相应模具制造公差的标准DIN16749。该共设4种公差。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。

The German national standard has formulated the corresponding die manufacturing tolerance standard din16749 for the tolerance of plastic parts. There are 4 kinds of tolerances. For plastic parts of any material, the tolerance of No. 1 shall be used for the manufacturing tolerance of the mold without dimension tolerance.

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。

The specific tolerance value is determined by the basic dimension range. The mold manufacturing tolerance of medium precision dimension of plastic parts of any material is the tolerance of No. 2. No matter what kind of material, the mold manufacturing tolerance of the higher precision dimension of the plastic part is the tolerance of No. 3. The die manufacturing tolerance corresponding to precision technology is the tolerance of No. 4.

综上所述，冷作模具钢尺寸与制造公差是由基本尺寸范围确定，合理的确定各种冷作模具钢材料的尺寸与制造公差是非常重要的。以上就是关于冷作模具钢的内容，相信大家已有所了解，更多相关内容关注我们网站https://www.jnqhmj.com！

To sum up, the dimension and manufacturing tolerance of cold work die steel are determined by the basic dimension range. It is very important to reasonably determine the dimension and manufacturing tolerance of various cold work die steel materials. The above is about the content of cold work die steel. I believe you have already understood it. For more related content, please follow our website https://www.jnqhmj.com ！