菱形钢精度高，要求严，直线性和对称性好，又无明显界限，必须取样在显微镜下观察进厅测定，这是孔型设计所面临困难的一面，然而型面尺寸是对称的，这又是简单的一面，为了减少精密磨削加工，在可能情况下，孔型个数越少越好，因而仅设两个孔，即一个成品孔，一个半成品孔，这两个孔型设计，我们主要考虑利用金属流动的最小阻力定律和宽展这一主要因素，为控制和保证型面高度，成品孔采用立式孔型，而为了圆形钢丝直接变形成所需异型断面，成品前采用卧式孔。
Diamond Steel has high precision, strict requirements, good straightness and symmetry, and there is no obvious boundary, so it is necessary to take samples and observe them under the microscope to enter the hall for measurement, which is the difficult side of the pass design. However, the size of the pass is symmetrical, which is also the simple side. In order to reduce the precision grinding, the less the number of passes is, the better. Therefore, only two holes are set, i.e. one Finished hole, one semi-finished hole, these two hole designs, we mainly consider the use of the minimum resistance law of metal flow and the spread of this main factor, in order to control and ensure the height of the surface, the finished hole adopts vertical hole, and in order to directly change the circular steel wire into the required profile, the horizontal hole is used before the finished product.
成品立式孔型给出上、下顶角，蠕动泵 保定建筑设计 保定网站建设 保定网站制作 保定网络公司 保定办公家具 保定轻钢别墅 通过计算求出各个参数，而半成品卧式孔型则主要在计算纸上放大50-100倍。
The vertical pass of the finished product gives the top and bottom angles, and the parameters are calculated, while the horizontal pass of the semi-finished product is mainly enlarged by 50-100 times on the calculation paper.