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硬质合金产品在压制成型的过程中,冲头与阴模之间有正常的配合间隙,一般在0.015~0.03 mm之间。对于一些异型产品由于自身结构的特殊性,配合间隙难以控制,压制时容易产生较大的配合间隙,一般在0.07~0.30 mm之间,导致产生大的毛刺,影响模具使用寿命及产品质量和外观。本文通过UG三维软件对二种常见的硬质合金产品(A3系列焊接刀片、K0系列钎片)进行研究,从产生毛刺机理入手,利用UG三维造型,模拟DORST双向压机压制时的状态,改变冲头与阴模配合段的形状及尺寸,推导出CAD二维模具加工图,利用高精度机床控制好二者的配合尺寸,保证配合间隙由0.07~0.30 mm减至0.015~0.03 mm,能有效地防止毛刺的产生,达到产品使用要求。
Carbide products in the process of compression molding, punches and die with a normal fit between the gap, usually between 0.015 ~ 0.03 mm. For some special-shaped products due to the particularity of their structure, with the gap difficult to control, when pressed easily produce a larger gap, usually between 0.07 ~ 0.30 mm, resulting in a large glitch, affecting the life of mold and product quality and appearance . In this paper, two kinds of common carbide products (A3 series welding blades, K0 series drill bits) are studied by UG three-dimensional software. Starting from the generation of glitch mechanism, UG three-dimensional modeling is used to simulate the state of DORST two- Punch and the mold with the shape and size of the segment, derived CAD two-dimensional mold map, the use of high-precision machine tool to control the size of the two to ensure that the gap with the 0.07 ~ 0.30 mm reduced to 0.015 ~ 0.03 mm, effective To prevent the generation of burrs, to meet product requirements.