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    Stamping is a manufacturing method which shapes sheet materials rapidly through procedures like shearing, blanking and bending. Stamping features the precise, mass, economic and effective production that it can produce fast and repetitively. We will talk about the difference between regular stamping die and fine blanking press later. Before, ...
          Generally speaking, when it comes to deciding the thickness of sheet materials, the unevenness is often a concern. It then becomes necessary for the sheet materials to have additional thickness, so that we can machine the materials to the required dimensions and at the same time ensure the accuracy of the reference...
      We probably all heard about this old saying in our lives: “To err is human, to forgive divine.” Of course we are not going to talk about making mistakes and forgiving people here. It is that the saying perfectly matches the topic we are about to discuss this time: burr and deburr. A burr refers to a small piece of material...
    Undoubtedly, part warping is a nightmare for both manufacturers and customers. It can affect the functionality of a part or lead to assembly failure. Generally, part warping is due to residual stress, which can be highly relevant to the choice of materials, dimensions of the part, and manufacturing conditions.       ...
    Previously on Case Study we discussed material shrinkage as an important factor to be considered in the design before production. Apart from material shrinkage, there are still far more factors you have to be aware of in your design. That being said, devil is in the details. Especially when designing an assembly part, you have to pay extra atte...
    It is always exciting to carry out new projects. However, before moving on to the production process, you have to make sure that your design already includes all the factors that might have influences on your parts.   This time, APPORO would like to share with you how material shrinkage happens, and how it can affect your parts. &nbs...
    As mentioned previously in "Cross Knurling Profile DIN 82-RGV", knurling is a manufacturing process to feature straight, crossed, angled, diamond-like lines or pattern onto the CNC components. Usually, we use DIN 82 knurling specification standard for most CNC machining cases. If diamond knurling is required, we shall use DIN 82-RGE which is ...
    With recent increase in demand for more ultra precision machining designs for improving performance requirements, we are facing a great challenge in this kind of CNC machining services. Generally speaking, the greatest challenge when we machine these components is part distortion. For instance, assemblies with multiple enormous parts, of which remo...
    Parts after machining, cold rolling and welding usually generate internal residual stresses which may result in serious and unacceptable shrinking or distortion. Whatever the parts are made of metal or plastic. Recently, we are running a CNC machining project of rotor shaft for our Singapore client. At current, this project is still in First Articl...
    Aluminum is usually reactive with water or air to form a stable passive layer of aluminum oxide. Actually, this anti-corrosion protective layer can stop the rest of aluminum metal from oxygenating. Both chemical conversion and anodizing processes are surface treatment to enhance the oxidation process especially for aluminum alloy. In the previous...
    A few days ago, we talked about various factors which may affect your manufacturing costs in previous article. In short, material costs are directly relative to part quality and durability. And, surface treatment costs have significantly increased recently due to strictly environmental policy. Apart from the above two factors, there are still oth...
      It can be very difficult to accurately predict machining time and cost. Sometimes, to request a quote for your manufacturing project feels like looking for a needle in a haystack. In fact, you can still have an initial concept of cost even without 2D and 3D CAD drawings.     Various factor which have impact on m...
    At APPORO, we specialize in high quality metalwork production with a great price. Apart from general CNC machining services, we also provide rapid prototyping service for customized metal fabrication. With our systematic arrangement of a range of technologies, we are a perfect one stop shop to meet all your prototyping need. Our professional team...
    Annealing(*Ref.) is one of the well-known heat treatment process. Commonly used in applications where a component is bent or crimped, it lowers the possibility of metal cracking during the cold-working process.  In APPORO, we provide annealing heat treatment service for customized CNC parts.   A complete annealing process for stee...
    Computer-aided design(*Ref 1.), also called called CAD, is widely used in most industries to improve the efficiency and quality of design for CNC machining services. It is highly conducive to communication between designer and manufacturer. Also, it serves as a great platform carrying complete information for CNC machining services manufacturers....
      Reverse engineering(*Ref), also called back engineering, is to get the design information from the item already made. For CNC machining services, it is to reproduce the item according to the obtained information. Laser scanner, CMM, profile projector, industrial CT scanning are the most powerful measurement tools for reverse engineering...
    In January, we have talked about a new progressive stamping project for making a straight flat actuator of micro switch. In short, the reason why we build a progressive punching mold for production is mainly based on annual demand of the project. Visit our website to check out what a progressive stamping mold is.     ...
    APPORO is well experienced in precision stamping mold production.  We regard ourselves as a professional manufacturer in fields of deep drawn, progressive stamping, and bending. Recently, a self-service machine industry customer contacted APPORO for these stainless steel micro switch actuators. Meanwhile, they were also looking for an altern...
    Recently, our US client commented on our latest shipment of CNC milling aluminum anodizing parts. All the part profile dimensions are okay, except that the surface of the part was blotchy and not shiny, sharp as before. Our client tried to wipe a part with alcohol to see if the surface appearance improved, but it did not work. The photo below sho...
    Generally speaking, pockets with a depth more than 5 times the smallest corner radius will incur an additional fee to the CNC machining cost. See the spare part of the video camera monitor described below. We will have to use a .250″ diameter flat end mill with a 1.25″ length of cut, when is a very fragile cutter. To avoid the end mil...
    Over the last 10 years, as a professional CNC machining services supplier, APPORO have always strived to get new and high precision CNC turning lathe machines to improve our production capability. Most of our clients are suppliers of various high precision and quality spare parts to their downstream industries. They choose APPORO as their be...
    Chrome plating is a standard option for a bright and shiny looking, usually applied to products of certain hardness, anti-corrosion and anti-wear required. Apart from chrome plating, satin chrome plating serves another fantastic option of modern looking alternatively which features dull and matte surface appearance.     What is...
      What is Electroless Nickel Plating?   Electroless nickel plating (EN) is a layer of nickel-phosphorus alloy on a metal or plastic substrate, and has a better ability of anti-wear, anti-friction and anti-corrosion compared with electroplated nickel. The phosphorus content ranging from 2% to 13% in EN can be categorized into be...
      So far, most of APPORO’s CNC machining services cases include inner or external thread machining. The reason for CNC machining parts featured with thread is mainly for assembly. However, there are a variety of thread specs for various industrial application purposes. For example, ISO Metric Standard, Unified Thread Standard, Natio...
    Regarding quality inspection, we mostly use vernier scale and micrometer for measuring the dimensions of precision manufacturing CNC parts. As per our policy of IPQC, we are able to read the  measurements much by using vernier scale and micrometer.      What kinds of parts can we use Vernier scale and micrometer ...
    In precision plastics CNC parts machining process, we use plastic rods with precise external diameter for efficiency CNC fabrication.       How to obtain plastic rods?   First, we will inject and press the melted raw plastics into metal mold to form plastic rods with high pressure, and then harden the rods by...
    What is Aluminum Anodizing?   In general, oxidation process is likely to damage or weaken most metal parts. However, the oxidation process for aluminum alloy named aluminum anodizing can increase the ability of strength and anti-corrosion. The anodized parts have to be treated over four major processes: pre-clean, anodizing, dye and se...
    After CNC fabrication processing, the machined workpiece is usually with smooth metal surface. However, to better grip with hands/fingers, or for plastic injection insert and decoration purpose, it is common to have parts knurled. Knurling is a manufacturing process to feature straight, crossed, angled, diamond-like lines or pattern onto the CNC ...
    Aluminum anodizing is to produce oxide layer on the surface of aluminum parts to improve the capability of anti-corrosion. In previous case study, we discussed this topic once. This time, we will be talking about aluminum anodize coating failure. The anodizing failures of  an aluminum CNC machining part generally fall into som...
      Residual stress is an inherent force resulting from plastic injection molding process. The stress mark occurs when the molten polymer is cooled and shaped. Sometimes, residual stress is purposely formed to obtain desirable characteristics, such as in oriented PET films and bottles. However, in most cases, these stresses could be potenti...
    When it comes to aluminum surface treatments, we recommend anodizing mainly for cosmetic appearance purpose. There are generally two types of aluminum anodizing. One is conventional anodizing (MIL-A-8625 Type II), the other one is hard coat anodizing (MIL-A-8625 Type III). When a part is anodized, the anodizing does not only build up the 0.005 - ...
    There are many ways for thread drilling in metalworking of CNC machining services. As for external threads, thread rolling and thread dies are most commonly used. As for inner thread machining, we generally use taper/second/bottoming three steps thread tapping or fluteless tapping.     Frankly speaking, to drill a deep and small i...