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Quality Inspection

当今的许多零件制造公司都在关注Deming的推荐持续改进的做法。

他们将对质量检查的依赖减少为他们的目标之一and seek to accomplish that goal by steadily improving the reliability of their manufacturing processes so as to build quality into their products.

The need for quality inspection and quality inspection services has not yet gone away,然而。只要买家依赖于单个供应商或离岸供应商,他们的制造技术就不得不始终轻松监控,因此对质量检查(QI)服务的需求很可能与我们同在。

QI服务将继续提供价值,通过节省买家和供应商,否则可能必须专门用于重新制作,重新工作,维修或更换废弃的零件或组件。

检查类型

质量检查(QI)通常由独立政党进行;但是,当可能在供应商的工资单上的检查员专门为客户或买方提供服务时,可以在内部进行此服务。

Depending on how and where parts are to be used, and the risks associated with using a defective part, or a wrong part, QI can take on many forms

Inspection of parts-producing machines and processes

这些是预生产的QI服务,这些服务告诉买家,除其他外,原材料的种类和质量和质量将被使用。

They can include a detailed review of production processes to ensure that corners are not being cut for the purpose of speeding up production or making a manufacturing process easier.

在生产检查期间(Dupro)

这些检查提供了早期产品质量的度量。这是一项非常有用但评级不足的QI服务。

它可以预测需要返工的可能性,或者需要采取纠正措施,并提供数据预先计划的数据。

Final random inspections

零件包装以进行运输后,进行最终随机检查。通常执行此QI服务,以确保零件供应商不玩游戏。

Final inspections can also be used to verify that the correct parts are being shipped.

Platform inspections

Platform inspections在零件被运输后,但在使用之前就发生。这些检查可以是完全随机的,但通常涉及100%发货零件。

Once the parts pass inspection, the probability of a part being put to use is defective or incorrect is zero, or close to zero.

Piece-by-piece inspection

Piece-by-piece inspection在工厂中是另一种QI方法,可以确保有缺陷的零件数接近零。

逐件式的Qi服务通常用于复杂零件,通常由不在零件制造商工资单上的检查员执行。

QI服务也可以由负责建立和管理买方库存的公司执行,尤其是在需要存储多个供应商的零件时。

QI方法和工具

The two most common methods of parts inspection involve manual measurements, such as calipers and/or gauges, and the use of coordinate measuring (CMM) systems, in which physical geometrical characteristics of a part are measured by other than purely mechanical methods.

CMM通常会发现它们用于复杂零件的最大用途,在这些零件中,手动测量可能困难,繁琐甚至不可能。

当今使用的CMM有很多类型。它们是手动或计算机控制的。它们通常涉及连接到固定机器第三移动轴的探针。

Common probe types include mechanical, optical, laser, and white light measuring devices.

CMM可以是独立的,便携式的或手持式的,后者通常使用光学三角剖分方法,从而可以允许检查零件周围的完全移动自由。

独立的CMM机器(图像1)和便携式CMM机器(图2)

基本的CMM系统由坐标测量机,探测系统(ARM或激光/光学)以及数据收集和还原系统组成;通常由台式计算机和适当的应用程序软件组成。

目前正在使用CMM机器,可以为5个位置提供精确的测量结果,并一直延伸至纳米级。

Gauges and calipers have by no means become obsolete. They are capable of making very accurate measurements, they enjoy wide usage, and they likely will continue to do so.

While it is still desirable to have third-party inspectors conduct QI tasks, modern equipment featuring digital data reduction and reporting techniques has made it easier for buyers to accept quality inspection results that are performed at supplier facilities, and by the supplier.

Deming’s advice of building quality into a part仍然是一个目标,但是即使这样做也可以成为标准实践,对零件和制造过程的质量检查的需求不太可能消失。


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从合同制造公司BuntyLLC evolved into a full service custom machined, forged and cast metal parts fabrication enterprise. We supply global solutions from our headquarters in Greenville, South Carolina.

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