Before forming the titanium plate, the first step is to cut the material. The cutting of titanium plates also adopts conventional methods such as sawing, milling, shearing, and punching. Due to the high strength of titanium plate, it is different from aluminum alloy cutting.

1. Sawing.

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 for cutting titanium plates with a thickness of more than 3mm. This method does not produce edge cracks, but its disadvantage is that it has burrs and must be polished after cutting. Currently, it is mainly used for processes such as edge cutting, trimming, and end cutting.

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 its high linear speed, there is severe friction between the saw blade and the workpiece, resulting in a high temperature in the cutting area. This reduces the cutting resistance of the material, improves processability, and increases efficiency.

The band used for titanium sawing should be of a rigid structure with sufficient power to maintain a constant speed during sawing; 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. Saw blades with tungsten carbide blades are used to cut particularly thick materials, reducing the height of burrs and the depth affected by heat.

2. Milling.

Use a milling cutter to mill a stack of titanium plates to the desired shape, with the milling head moving along the milling template, or use a large CNC sheet metal milling machine for automatic milling. For stretched edges such as concave curves or flanges, they should be polished before forming to prevent cracking.

3. Cut.

Raw materials or parts with a straight shape can be cut on a gantry shearing machine. 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 plates can also be cut. To prevent slipping, a higher clamping pressure is required. On the edges of cut titanium plates, 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. Switching to thicker cutting edges can sometimes overcome this defect. If the material blocking device is modified and digital display, fine adjustment 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 can 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 smaller gap between the single sides of the scissors is 2-3% of the material thickness, the cutting angle is 75-85 degrees, the back angle is 2-3-3 degrees, and the inclination angle of the upper blade of the oblique 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 (a smaller radius of about 250 millimeters), which is used for titanium plates with a thickness of F below 2.5 millimeters. The current vibration shearing machine is 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, with a filing allowance of more than 0.25 millimeters left. For thin materials (thickness<0.8 millimeters), when the quantity is not large, lever type manual scissors or hand scissors can also be used to cut the material.

4. Punching.

Usually, the desired shape of the raw material is cut in one pass on a punching machine. Usually for simple shaped blanks, the larger 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 of the upper and lower molds. When manufacturing various flat parts or blanks of various shapes, the smaller size of titanium plate punching holes and the smaller radius of the connecting edges of the punching parts should meet the requirements.

In addition, a punching and shearing machine can also be used to cut materials. During processing, a crescent shaped cut is made using a small punch according to the template and connected to cut out the burrs of the parts, and then the edges are trimmed. The quality and accuracy of the edges are not as good as that of punching with a punch, and the efficiency is also not high. The advantage of punching and shearing processing is that the production preparation cycle is short, and it is commonly used for small batch production.