The expression “burrs” that is commonly used in metal processing sites such as pressing and cutting may not be understood by people who are not involved. Therefore, on this page, we will explain what burr is and why it occurs. We will also introduce the challenges of measuring burr as a quality inspection and how to solve them. What Is Burr? Burr is a metal ledge that occurs on the cut surface in shearing and drilling by pressing. It is also commonly defined as “the outer residue of a geometric shape at the edge of the shape and the residue on the part during......

Quality Inspection is an important process to ensure quality by evaluating whether the products of manufactured parts and products conform to the specified values. In particular, inspections of appearance, dimensions, and shape can not only prevent the outflow of defective products by determining whether OK or NG is possible but are also useful for identifying the cause and preventing recurrence by obtaining detailed information on defects and defects and conditions. In addition, in the case of products consisting of multiple parts, it is possible to prevent the outflow of defect......

Gears, along with screws and springs, are parts used in many products. There is a wide variety of sizes, shapes, and materials depending on the application. In addition, there are various functions, and it can be used for various purposes by combining gears and gears, as well as shafts and cams. And all gears are made with high precision. However, with increased use, for example, deformation due to wear occurs. Among them, the dimension of “tooth thickness” is important, and it greatly affects not only the operation of the gear but also the strength. Here, the conc......

Bearings are built into all kinds of products, from home appliances to automobiles, and are indispensable parts for the manufacture of machines. It is also called the “rice of the machinery industry”. In this article, we will explain the importance of doing quality inspection for bearings by breaking down the role and types of bearings, manufacturing methods, possible defects, and inspection methods. If you want to better understand bearings, please read to the end. Role of Bearings A bearing is a part that smoothly rotates an axis inside the machine. Since it i......

Since aluminum also has the soft nature of the material, scratches may occur in the cast product or foreign matter may intervene depending on the factory environment, which greatly affects the quality. Therefore, we will introduce the points of inspection that we conduct in order to provide stable and high-quality aluminum castings. What Is The Inspection Process Of Aluminum Castings? There are two types of inspection processes for aluminum castings: pressure resistance inspection and foreign matter contamination. 1. Pressure Resistance Test When testing the tightness an......

Even if it is said that resin molding processing is said to be a mouthful, there are various methods such as “injection molding“, “extrusion molding”, “transfer molding”, “compression molding”, etc. And since there are various types and causes of defects that occur during molding, it will take a lot of time and cost if you do not grasp the causes and countermeasure methods of each. However, now that the shortage of human resources is becoming chronic, there are many cases where even if you know the cause and countermeasures, you can not co......

A sink mark is a phenomenon in which the surface of a molded product is slightly concave due to shrinkage. Molded products with external surfaces may result in poor quality. Sink marks may not appear on the surface of the part, and bubbles (cavities) may form inside the part. This is called a void. This phenomenon occurs because molten plastic resin for both sink marks and voids causes abnormal shrinkage in the process of cooling and solidification. Here, we will introduce tips for mold design to reduce the occurrence of sink marks, as well as challenges and solutions for measuri......

Compared to metal and ceramics, resin molding makes it possible to produce a large number of high-precision products at low cost. In addition, since it is cheaper and superior in mass production than processing methods such as cutting and pressing, there are many cases where parts that used aluminum etc. at the prototype stage are changed to resin at the mass production stage. However, it also has characteristics such as injection and blow failures due to abnormalities such as viscosity, temperature, and pressure during molding, and shape defects due to mold wear. Furthermore, du......