Titanium products before molding the first under the material. Titanium plate undercutting is also used conventional punching, shearing, milling and sawing methods. Because titanium plate is strong, so it is different from aluminum alloy material.
1,Shearing
Manufacture of linear shape of the wool or parts, can be cut on the gantry shearing machine. If an ordinary shearing machine is used, double-check whether the equipment can shear titanium plates. Titanium plates with a thickness of 35 mm or less can already be sheared to the required size under production conditions. Thicker plates can also be cut if the necessary measures are taken to avoid slippage during shearing. To prevent slippage, a high clamping pressure is required. On the edge of the cut titanium sheet, especially for thicker sheets, the straight line deviation is 0.25-0.50 mm, which is usually due to insufficient rigidity of the cutting edge. Changing to a thicker cutting edge will sometimes overcome this defect. If the modification of the blocking device, and the use of digital display, fine-tuning and other technologies, but also under the material accuracy can be improved. Titanium plate edge crack depth of not more than 0.4 millimeters, can be removed by grinding wheel and filing and other methods. If the shear will make the parts of the critical parts of the crack, should consider the use of band saws and other methods of undercutting. With gantry shearing machine under the material, the minimum gap between the scissors single-sided for the material thickness of 2-3%, shear angle of 75 degrees -85 degrees, after the angle of 2 degrees -3 degrees, beveled blade shear bed blade tilt angle of 2 degrees -5 degrees.
Titanium plate can also be used for ordinary rolling shear equipment under the material. Circular shear can be cut with a large radius of curvature of the contour line (minimum radius of about 250 millimeters), this method is used for the thickness of 2.5 millimeters F below the titanium plate. The current vibratory shearing machine is only suitable for cutting thickness of 2 mm or so of titanium plate, cut the edge of the wool must also be filed or ground, to leave more than 0.25 mm filing margin. For thin material (thickness <0.8 mm), when the number is not much, but also with a lever-type manual shear or hand shear material.
2, punching and cutting
Generally in the punch press to punch out the desired shape of the wool. Usually simple shape of the wool, the maximum thickness of the material is about 3 mm. Titanium plate under the material mold should be sufficient rigidity, with the guide column so that the upper and lower mold to maintain an accurate relative position. Manufacturing a variety of flat parts or a variety of shapes of raw materials, titanium plate punching the minimum size, punching the minimum radius of the edge of the parts connected should meet the requirements.
In addition, can also be used punching and shearing machine material, processing according to the sample with a small punching die punching crescent-shaped incision, and make it connected, so as to cut out the parts of the burr, and then repair the edge of the key, the edge of the quality and accuracy are not as good as punching die punching and cutting, and the efficiency is not high. The advantage of punching and shearing is a short production preparation cycle, commonly used in the production of small batches.
3, band saw
Band saw processing efficiency is high, easy to prepare for production, but not suitable for processing too thin materials, commonly used in cutting titanium plates with a thickness of more than 3 mm. This method does not produce edge cracks, the disadvantage is that there are burrs, the material must be sanded. At present, it is more often used for cutting edges, trimming and cutting ends and other processes.
Band saw cutting can be divided into three categories: friction, semi-friction and ordinary band saw. Friction band saws work due to high linear speed, saw blade and workpiece friction between the intense friction, in the cutting zone temperature is very high, thus reducing the cutting resistance of the material, improve the processability, high efficiency.
Saw titanium with the band should be rigid structure, there should be enough power to maintain a constant speed when sawing; should be able to automatically feed, tension band saw and provide sufficient coolant. With the usual high-speed steel band saws will be able to maintain a sharp edge and get consistent results. Saw blades with tungsten carbide blades are used for sawing particularly thick materials to reduce the height of burrs and the depth of heat exposure.
4. Milling
A stack of titanium plates is milled with a milling cutter to the desired shape, with the milling head moving along the milled sample plate, or automatically milled with a large CNC sheet metal milling machine. For concave curves or flanges and other edges subject to stretching, waist polishing before molding to prevent cracks.
