As a professional manufacturer of insulation parts. Our factory is equipped with 3,4 and 5-axis machining on a range of CNC Milling machines. One of our advantages is that we are not only offering insulation tube or insulation rod, but also secondary machining service for our customers. Therefore, we can help on cost down and shortening lead time. 

Learn about the following insulation parts:

Epoxy Glass Tube

Epoxy Glass Tubes are highly economical insulating tubes that offer a combination of excellent mechanical strength and good electrical performance. Like our Epoxy Glass Rods, our Epoxy Glass Tube is capable of withstanding continuous temperatures up to 130oC (though other grades of material, such as our Isoval Tube, with higher temperature ratings are also available upon request).

The combination of electrical performance and mechanical strength offered by our epoxy glass tube allows them to often be utilised in the manufacture of insulating bushings as well as insulating sleeves. Yellow in colour, our Epoxy Glass Tube can be machined to tight tolerances and thin wall thicknesses.

Epoxy Fiberglass Rod

12 foot long epoxy fiberglass rod 11 16 diameter is made of high strength aramid fiber and glass fiber, impregnated with epoxy resin by pultruding under high temperature. It has ultra-high strength, excellent wear resistance, acid and alkaline resistance, corrosion resistance and other excellent high temperature performance characteristics. It is suitable for electrolytic aluminum plant, steel works, high temperature metallurgical equipment, ultra-high voltage electrical equipment, aerospace and aerospace fields, transformers, capacitors, reactors, high voltage switches and other high voltage electrical appliances.

CNC machining is a term commonly used in manufacturing and industrial applications. But exactly what is CNC? And what is a CNC machine?

CNC 101: The term CNC stands for 'computer numerical control', and the CNC machining definition is that it is a subtractive manufacturing process which typically employs computerized controls and machine tools to remove layers of material from a stock piece—known as the blank or workpiece—and produces a custom-designed part. This process is suitable for a wide range of materials, including metals, plastics, wood, glass, foam, and composites, and finds application in a variety of industries, such as large CNC machining, machining of parts and prototypes for telecommunications, and CNC machining parts, which require tighter tolerances than other industries. Note there is a difference between the CNC machining definition and the CNC machine definition- one is a process and the other is a machine. A CNC machine is a programmable machine that is capable of autonomously performing the operations of CNC machining.

Subtractive manufacturing processes, such as CNC machining, are often presented in contrast to additive manufacturing processes, such as 3D printing, or formative manufacturing processes, such as liquid injection molding. While subtractive processes remove layers of material from the workpiece to produce custom shapes and designs, additive processes assemble layers of material to produce the desired form and formative processes deform and displace stock material into the desired shape. The automated nature of CNC machining enables the production of high precision and high accuracy, simple parts and cost-effectiveness when fulfilling one-off and medium-volume production runs. However, while CNC machining demonstrates certain advantages over other manufacturing processes, the degree of complexity and intricacy attainable for part design and the cost-effectiveness of producing complex parts is limited.

While each type of manufacturing process has its advantages and disadvantages, this article focuses on the CNC machining process, outlining the basics of the process, and the various components and tooling of the CNC machine (sometimes incorrectly known as a C and C machine). Additionally, this article explores various mechanical CNC machining operations and presents alternatives to the CNC machining process.

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Overview of CNC Machining Process

Evolving from the numerical control (NC) machining process which utilized punched tape cards, CNC machining is a manufacturing process which utilizes computerized controls to operate and manipulate machine and cutting tools to shape stock material—e.g., metal, plastic, wood, foam, composite, etc.—into custom parts and designs. While the CNC machining process offers various capabilities and operations, the fundamental principles of the process remain largely the same throughout all of them. The basic CNC machining process includes the following stages:

Designing the CAD model
       
Converting the CAD file to a CNC program
       
Preparing the CNC machine
       
Executing the machining operation
       
CAD Model Design

The CNC machining process begins with the creation of a 2D vector or 3D solid part CAD design either in-house or by a CAD/CAM design service company. Computer-aided design (CAD) software allows designers and manufacturers to produce a model or rendering of their parts and products along with the necessary technical specifications, such as dimensions and geometries, for producing the part or product.

Designs for CNC machined parts are restricted by the capabilities (or inabilities) of the CNC machine and tooling. For example, most CNC machine tooling is cylindrical therefore the part geometries possible via the CNC machining process are limited as the tooling creates curved corner sections. Additionally, the properties of the material being machined, tooling design, and workholding capabilities of the machine further restrict the design possibilities, such as the minimum part thicknesses, maximum part size, and inclusion and complexity of internal cavities and features.

Once the CAD design is completed, the designer exports it to a CNC-compatible file format, such as STEP or IGES.

CNC Machining Tolerances Tables

When specifying parts to a machine shop, it's important to include any necessary tolerances. Though CNC machines are very accurate, they still leave some slight variation between duplicates of the same part, generally around + or - .005 in (.127 mm), which is roughly twice the width of a human hair. To save on costs, buyers should only specify tolerances in areas of the part that will need to be especially accurate because they will come into contact with other parts. While there are standard tolerances for different levels of machining (as shown in the tables below), not all tolerances are equal. If, for example, a part absolutely cannot be larger than the measurement, it might have a specified tolerance of +0.0/-0.5 to show it can be slightly smaller, but no larger in that area. 

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