1)Suitable for conveyance of gas, petroleum, fluid, and electricity
A: Alloy Pipe and tube Size Range: Steel Pipe ERW Steel Pipe, Square Steel Pipe, LSAW Steel Pipe, SSAW Steel Pipe Cangzhou Weiheng Pipe Industry Co.,Ltd , https://www.czweiheng.com
FRP is a common name for glass fiber reinforced thermosetting resin matrix composites and it is a hard-to-cut material. FRP has phenolic resin base, epoxy resin base, unsaturated polyester resin base and so on. The main component of the glass fiber filler is SiO2, hard and wear-resistant, high strength, heat resistance, and poorer cutability of plastic than wood flour as filler. Different resin matrix, machinability is not the same. Epoxy resin base is harder to cut than phenolic resin base. Tests have shown that the cutting tool material of FRP is the most severely damaged by high-speed steel, and P-type and M-type hard alloys also wear large, and K-type wear is minimal. In class K, the K10 with the least cobalt content is the most wear-resistant, while the diamond or cubic boron nitride tool is used to cut the glass fiber, which can greatly increase the production efficiency. When selecting the geometric parameters of the cutter, r0=20~25° for glass fiber reinforced plastic sheet material, molding material and winding material with high glass fiber content; for filament winding material, make r0=20~30°. Because the resilience of FRP is larger, the rear corner should be selected to have a large value, so that a0=8~14°; the minor declination angle is smaller, the surface roughness can be reduced, and the finishing car is 6~8°. Processed delaminated, fluffed coiled tubing and fiber-wrapped FRP should use a 6 to 15° blade angle. During cutting, v=40~100m/min, f=0.1~0.5mm/r, aP=0.5~3.5mm, and aP=0.05~0.2mm when finishing.
Second, thermoplastic resin matrix composites
The basic processing features of the machining of thermoplastic resin matrix composites are:
1) Add coolant when processing to avoid overheating. Overheating will melt the workpiece;
2) using high-speed cutting;
3) The cutting tool must have a sufficient capacity for the flutes;
4) Use a small amount of back knife and a small amount of feed;
5) The turning tool should be ground to a certain inclination to minimize the cutting force and thrust of the tool;
6) Twist drills for thermoplastic composites;
7) Tungsten carbide or corundum cutters, or special high-speed steel cutters for plastics should be used;
8) The workpiece must be properly supported (back pad) to avoid delamination caused by cutting pressure;
9) When precision machining, consider the plastic memory and the room temperature of the processing workshop;
10) The cutter head and cutter must be sharp, and the blunt cutter can increase the cutting force on the workpiece.
Third, metal matrix composites
The most important feature of metal matrix composites (MMC) is good molding performance, which can basically meet the requirements after molding. However, with the expansion of the application of composite materials, especially the application of MMC in the industrial and aerospace fields, the processing and finishing of such materials is increasingly important. For example, large SiC/Al plates manufactured in the United States need to be water jet cut and fixed on the metal matrix composite beams with standard steel connectors. The volume percentage used for tactical missiles is 25% for SiC particles and 2124 for aluminum matrix composites. The blanks must be processed by diamond tools before they are applied. This results in secondary processes such as water cutting, drilling and turning.
Traditional cutting, turning, milling, grinding and other processes can generally be used for MMC, but the tool wear is more serious and tends to increase with the increase in the volume fraction and size of the reinforcement material. And the ability of large particles or fibers to resist shedding is stronger, so the tool is more stressed. Therefore, for some single-fiber-reinforced MMCs, it is often necessary to use diamond-tipped or diamond-embedded tools. For short fiber or particle composites, tungsten carbide or high speed steel tools are also sometimes used. The strength of the reinforcement also affects the wear of the tool. The higher the strength of the general reinforcement, the more difficult it is to cut. It was found that silicon carbide whisker reinforced aluminum matrix composites are more difficult to machine than other aluminum matrix composites. For most MMCs, using sharp tools, proper cutting speeds, large amounts of coolant/lubricant, and large feeds can be very effective. In general, diamond tools are better than hard alloys and ceramic tools and are more suitable for high-speed turning. Conversely, if carbide tools are used, the tool life is long if the turning speed is low. Wire saws can also be used to cut MMCs, but generally they are slow and can only be cut straight.
Because composite materials and traditional materials have different characteristics, the cutting process of composite materials is essentially different from that of metal materials. Therefore, the experience and knowledge gained from processing traditional materials cannot be directly applied to the processing of composite materials, and new methods must be adopted. Study its processing performance.
Specifications
2)Seamless,SAW or ERW alloy Steel Pipe
THK <3"; OD <120"
1) Round pipe diameter: 4mm-3000mm, thickness: 0.3-60.0mm
2) Square tube: 8 x 8mm-1000 x 1000mm, thickness: 0.4-60.0mm
3) Rectangle tube: 8x 10mm-800 x 500mm, thickness: 0.4-60.0mm
B: Surface finish: black, blank, bright and galvanized, or painted
C: Length of each pipe: 500mm-16,000mm
D: Steel grade: 10#, 20#, A106B, A53B, Q195 Q235, Q345, ST37-2, ST52, S235, S355, SS400, A1010, SAE1045, X40, X60, A312, 304, 316 etc
E: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, ASTM A312, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10219, EN10025, EN10305 etc
Mechanical processing characteristics of various composite materials
First, glass steel