Our Blog

Difference between shot blasting and sand blasting

Difference between shot blasting and sand blasting, which one? Posted on : June 9, 2022 By  GREFEE Shot blasting uses the high-speed rotating impeller to throw the small steel shot or small iron shot to knock the part surface quickly to remove the oxide layer of the parts. Meanwhile, the lattice of the surface will distort when the steel shot or iron shot, which increases the stiffness. Shot blasting is often used for casting surface cleaning and part surface strengthening. Generally,…

How to select tools for CNC threads

How to select tools for CNC threads Posted on : June 14, 2022 By  GREFEE Threads are the most common methods to connect the mechanical parts, whereas the threads holes processing is machining often at the end of the whole production. Once the processing is unqualified, the part might be scrapped or re-processed. Thus, it has a high requirement for the safety of processing. Processing thread holes requires various tools. Commonly used tools include the thread turning tool, tap, extrusion tap,…

 Common welding methods of stainless steel round pipe

Common welding methods of stainless steel round pipe  Posted on : June 22, 2022 By  GREFEE With the automotive industry being more sophisticated, welding has been an indispensable technique for processing many key parts and accessories. Round types account for a large number of them. As the material improves, the application of the stainless steel pipes expands. Suppliers need parts to produce this type of parts are required to meet the needs of lighter weight, corrosion resistance, and high strength. Besides,…

Details that You Should Know in Controlling the CNC Part Tolerance

Details that You Should Know in Controlling the CNC Part Tolerance Posted on : June 13, 2022 By  GREFEE Tolerance refers to the difference between the actual geometric parameter (geometric dimension, geometry, and mutual position)after the processing and the ideal geometric parameters, also called the processing accuracy. The lower the error, the higher the degree of fit, and the higher the processing accuracy. The processing accuracy and the processing errors are two versions of one question. Thus, processing errors reflect the degree…

EDM process

Electrical discharge machining is an important method Posted on : June 17, 2022 By  GREFEE Electrical discharge machining is an important method, especially in plastic mold manufacturing. The cavity, slide, insert, pin, and other groove corners in the plastic molds will also need EDM. Since EDM is also a slow processing method, thus it takes a long time to process EDM in mold manufacturing. How to ensure the quality of EDM? Increasing the processing speed, shortening the mold manufacturing cycle, and…

Common Methods of Deburring of Castings

Common Methods of Deburring of Castings Posted on : May30, 2022 By  GREFEE Almost every product has the die casting requirement on products, which is surface finish is clean without scratches and no burrs on the edges. What are burrs? There are irregular tiny profusion staff on surface, most of them on the end face, outer hole or inner hole. Primary cause: Die casting parting surface or core pulling position (large burrs is galling), core kiss off/ shut off, post-mechanic machining,…

Bending sheet metal processing

Indispensable Methods of the Bending Sheet Metal Processing Posted on : May 31, 2022 By  GREFEE Bending (sometimes called flanging or bending) is one of the most widely used technologies in sheet metal-making. Sheet metal bending allows the manufacturers to turn a straight sheet metal part into one with angles. This is more cost-effective than welding the two single parts together or fixing them together. Sheet metal bending works in a permanent deformation method to apply the force to the sheet metal….

Application of laser welding and cutting in sheet metal industry

Application of laser welding and cutting in sheet metal industry Posted on : June 2, 2022 By  GREFEE The laser beam is easy to transmit. Its temporal and spatial characteristics can be controlled respectively. A very small sot can be obtained after focusing. The laser beam has quite a high power density, can melt and gasify any material, and carry out precision and rapid machining in local areas. In the machining process, the input heat of the workpiece, heat-affected zone, and…

Common issues of TPU injection molding

Common issues of TPU Injection Molding Posted on : May27, 2022 By  GREFEE TPU injection molding processing includes injection molding, blow molding, compression molding, extrusion molding, etc. Among all the methods, injection molding is the most common one. Injection molding is used to make TPU into the needed parts and split the process into three stages pre-molding, injection, and extrusion. The injection machines are classified into two types, plunger type, and screw type. The screw-type injection molding machine is better because…

Summary of CNC machining experience

IMore than 10 years of Experience, Summary of CNC machining Experience. Posted on : june 11, 2022 By  GREFEE CNC machining refers to machining with CNC machining tools. Since CNC machining is operated by the computer after programming, it has stable processing quality, high machining accuracy, and high repetition accuracy. It can process complex profiles and has high processing efficiency. In the real machining process, factors like people and the working experience influence the machining quality of the end products to…

Common surface treatments of magnesium alloy parts

Common Surface Treatments of Magnesium alloy parts Posted on : May20, 2022 By  GREFEE Magnesium is widely used in aerospace, automotive, and electronic product shells due to its low ratio, high specific strength, stiffness, great shock absorption, electromagnetic shielding, good recycling, etc. It has a huge development and application potential. The development of magnesium alloy is limited since it is easy to be eroded in humid and coastal areas, which results from its chemical and electrochemical activity. Therefore, some methods have…

Common clear injection material selection

Common Clear Injection Material Selection Posted on : May16, 2022 By  GREFEE The priority of clear plastic is to ensure high transparency. Its high strength, impact and wear resistance, thermal resistance, chemical resistance, and low water absorption rate make it meet the needs for transparency. For the clear material selection, PC is the ideal section but with high price and difficult injection molding technology. So, PMMA is the typical choice. however, a good mechanical performance of PPE should be obtained after…

keywords:5 axis cnc CNC milling 5 axis cnc machine CNC machining services CNC maching