News

Several commonly used methods for cutting titanium plates

Before forming the titanium plate, the material needs to be cut first. The cutting of titanium plates is also carried out using conventional methods such as sawing, milling, punching, and shearing. Due to the high strength of titanium plates, they are different from aluminum alloy cutting.
Band saw. Band saw has high processing efficiency and convenient production preparation, but it is not suitable for processing materials that are too thin. It is commonly used to cut titanium plates with a thickness of more than 3 millimeters. This method does not produce edge cracks, but its disadvantage is the presence of burrs, which must be polished after cutting. Currently, it is mainly used for edge cutting, trimming, and end cutting processes.
Band saws can be divided into three types: friction type, semi friction type, and ordinary band saws. During the operation of a friction band saw, due to the high linear speed, there is intense friction between the saw blade and the workpiece, resulting in high temperatures in the cutting area. This reduces the cutting resistance of the material, improves machining performance, and increases efficiency.
The strip used for titanium cutting should be a rigid structure with sufficient power to maintain a constant speed during cutting; It should be able to automatically feed, tension the band saw, and provide sufficient coolant. By using a regular high-speed steel band saw, the blade can be maintained and stable results can be obtained. A tungsten carbide saw blade is used to cut particularly thick materials, reducing the height of burrs and the depth affected by heat.
Milling and cutting. Use a milling cutter to cut a stack of titanium plates to the desired shape, and the milling head moves along the milling template, or use a large CNC sheet metal milling machine for automatic milling. For stretched edges such as concave curves or flipped edges, polish the waist before forming to prevent cracking.
Cut. Raw materials or parts with straight shapes can be cut on gantry shearing machines. If using a regular shearing machine, carefully check whether the equipment can cut titanium plates. Titanium alloy plates with a thickness of less than 35 millimeters can be cut to the required size under production conditions. If necessary measures are taken to avoid slipping during cutting, thicker sheets can also be cut. To prevent slipping, a larger clamping pressure is required. On the edges of the cut titanium plate, especially for thicker titanium plates, the straight-line deviation is 0.25-0.50 millimeters, which is usually caused by insufficient rigidity of the cutting edge. Using thicker cutting edges can sometimes overcome this defect. If the material blocking device is modified and digital display, fine-tuning and other technologies are used, the cutting accuracy can also be improved. The crack depth at the edge of the titanium plate should not exceed 0.4 millimeters and can be removed by grinding with a grinding wheel or filing. If cutting will cause cracks in key parts of the part, cutting methods such as band saws should be considered. When using a gantry shearing machine for cutting, the minimum gap between the single side of the scissors is 2-3% of the material thickness, the cutting angle is 75 degrees to 85 degrees, the back angle is 2-3 degrees, and the inclination angle of the blade on the diagonal cutting machine is 2-5 degrees.
Titanium plates can also be cut using ordinary rolling shear equipment. Circular shear can cut contour lines with a large curvature radius (minimum radius of about 250 millimeters), which is used for titanium plates with a thickness of F below 2.5 millimeters. At present, vibration shearing machines are only suitable for cutting titanium plates with a thickness of about 2 millimeters. The edges of the cut raw materials still need to be filed or ground, leaving a filing allowance of 0.25 millimeters or more. For thin materials (thickness<0.8 millimeters), when the quantity is not large, lever type manual cutting or manual cutting can also be used.
Punching. Usually, the desired shape of the raw material is cut in one punch on a punching machine. Usually for simple shaped woolen materials, the maximum cutting thickness is about 3 millimeters. The titanium plate cutting mold should have sufficient rigidity, and guide pillars should be used to maintain accurate relative positions between the upper and lower molds. When manufacturing various flat parts or rough materials of various shapes, the minimum size of titanium plate punching and the minimum radius of the edge of the punched parts should meet the requirements.
In addition, a punching and shearing machine can also be used for cutting materials. During processing, a crescent shaped cut is made using a small punching die according to the sample, and it is connected to cut out burrs on the part. Then, the key edges are repaired, but the quality and accuracy of the edges are not as good as those of the punching die, and the efficiency is not high. The advantage of punching and shearing processing is that the production preparation cycle is short, and it is often used for small batch production.

[ 上一页 ] Ultrasonic testing...[ 下一页 ] Welding of industr...