Increasing Part Life With CADI 用CADI工艺提高零件寿命
Farm Equipment Supplier Yetter Solves a Wear Issue 农机设提供者Yetter 解決了磨損發行的
A GLOBAL CASTING STAFF REPORT 一個全球性的鑄造工作人員報告
high-volume fertilizer applications. “When we had the fabrication part, it worked better than
Y
anything we had like it,” said Lonnie Lucas, engineer for Yetter. “But the knives were one of the first parts to wear on the assembly.” Te company also was dissatisfied with the knife’s fabrication time and dimensional instability. Several components welded to the knife also wore prematurely and required increased inven- tory for replacement. When worn, the complete knife assembly required significant cost and downtime to replace. “Te part requires so many small pieces, and each had a
tolerance,” Lucas said. “Te knife is made to run at an angle, and that tolerance is sensitive.” Over the years, Yetter had sourced many cast components
from Lethbridge Iron Works, Lethbridge, Alberta, Canada, so it knew converting to a casting could help reduce the number of parts on the assembly, decrease cost and improve dimensional stability. But the agri-
culture equipment manufacturer wasn’t sure which iron alloy would provide the necessary hardness in the application.
etter Manufacturing, Colchester, Ill., U.S., needed a solution to a prematurely wearing fer- tilizer knife fabrication for its Coulter assembly, an agriculture product designed for high-speed,
位
位于美国伊利诺斯州科尔切斯特的Yetter制 造公司，需要一种解决犁刀上的肥料刀过早 磨损的办法。犁刀是一种农机产品，被设计
用来高速、大容量地施肥。
“当我们得到制造出来的零件时，它比我们所拥有的 任何其他差不多的零件都要好”，Lonnie Lucas说。“ 但是刀具是装配零件中最早磨损的零件。” 公司也对刀具的制造时间和尺寸精度不稳定所不满。 一些焊接到刀具上的零件也过早磨损，需要更多的库存 来替换。磨损后，为了更换整个刀具装配体，需要大量 的花销，停工期也很长。
“零件需要如此多的小件，每一个都有尺寸公差” ，Lucas说。“刀具会在一定角度下工作，公差显得非 常敏感”。 多年来，Yetter从位于加拿大亚伯达莱斯布里奇的莱 斯布里奇钢铁厂获得了许多铸造部件，所以公司清楚使 用铸件可以减少装配体上的零部件，降低成本，提高尺 寸稳定性。
但是农机设备制 造商不确定哪一种铁 合金可以在使用中提 供必要的硬度。
The original knife fabri- cation worked well but was one of the first parts on the Coulter assembly to need replacement.
原始肥料刀工作良好， 但是犁刀装配体上的一 部分需要被替换。
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FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION May 2013
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