The Quality Control (QC) team at Apporo Industries identified an issue with CNC milling machined parts returned from a galvanizing supplier. Specifically, the edges of the threaded blind holes exhibited yellow rust spots. These blind holes, which do not pass through the entire part, were likely not ...
We encountered an issue with precision flat washer parts after cutting operations using laser cutting, where our quality team reported that both the inner and outer diameters had residual sharp nibs.
Cutting Nib on Precision Flat Washer Parts
These nibs, c...
A customer raised a significant concern regarding external threads on a CNC machined part specified as 3 7/8-16 UN-2A, pinpointing the presence of burrs along the threads, as evidenced by the attached images. Although the part passed the ring gauge test, which focuses on thread dimensions and form, ...
An issue of rust formation on a motor plate component, which was deemed non-compliant by a customer after delivery. The motor plate, made of carbon steel, was processed through CNC milling, then oiled, properly sealed for packaging before being shipped via sea freight. Upon inspection by the custome...
In the precision manufacturing industry, ensuring the quality of materials through accurate testing is crucial. This case study examines a situation where a customer reported that the surface hardness of a CNC machined tubular component did not meet the required standards due to incorrect testing me...
Tumbling, also known as vibratory finishing, is frequently used in the post-processing of CNC machined parts to remove sharp edges and burrs. However, the narrow groove edges might have been deformed due to the impact from tumbling, causing the groove width to shrink and making it impossible to asse...
The QC team inspected the motor plate, which was machined by the CNC milling machine center (see the photo below), and found a misalignment at the bottom of a bore.
Motor Plate Bore misalignment due to several possible causes
Our engineering and QC team have preliminari...
Since the late nineteenth and early twentieth century, globalization has gradually led to international trade, capital and investment flows, migration, and the knowledge dissemination. From the Q&A below, let’s take a look at how Taiwan as a west Pacific island country reaches such outstanding...
Stainless steel could last longer with passivation treatment.
One of the most frequently asked questions from our customers is that why stainless steel needs passivation(*Ref) treatment when it already has good anti-rust quality. It seems that ...
Perpetual motion machine remains a dream unattainable.
As a manufacturer, APPORO has quite an understanding of design of machine tools and the way they work. We figure how to optimize our CNC manufacturing procedures and to enhance the efficiency al...
It is inevitable to have burrs on the cutting or hole-drilling edge during the milling while milling parts. The size of burr is usually relevant to tool wear condition, feeding and rotary speed, material properties, cutting fluid, etc. The left burrs on the workpiece not only could get operatives sc...
The trade war between China and the US has been constantly escalated, which draws opposite sides of opinions from experts in all fields. On one side, many think tariffs limit the benefits of free trade, raising the cost of living, and failing to bring positive effects on the manufacturing in the US....
