The experience of turning such nuts includes the determination of the width of the cutter head, the control of the large diameter size and the reduction of the roughness of the tooth surface. The tooth thickness of the cutter head. It should be equal to the normal width of the screw. Because the helix angle of the screw is relatively large, the cutter head of the car nut is installed in the same direction as the screw normal.
In the turning process, the large diameter of the nut is affected by the elastic deformation of the tool bar under the rigidity of the machine tool, the tool and the cutting force. Difficult to control. To this end, the step of the workpiece is 1 to 2 mm long, and the inner diameter of the workpiece is equal to the large diameter of the nut to control the depth of cut of each head. Measures to reduce the roughness of the tooth surface can be carried out in the following two aspects without other process measures. On the one hand, the geometric parameters of the cutter head are reasonably selected; on the other hand, the traditional cutter method is changed in operation. When finishing the car-shaped surface, firstly finish the thread surface of the thread opposite to the direction of the knife, and then remove the cutter head and reversely mount it on the cutter bar (one is reverse assembly, the cutting edge of the cutter head is upward, and the workpiece is reversed) Turn and reverse the knife; the other is the reverse of the cutter head, the cutter is facing down, the workpiece is rotating forward and the knife is reversed.) The other side of the thread shape is finished. In this way, the roughness of the toothed surface can be greatly improved.
Suitable for quenched steel, tempered steel, annealed steel, cold and hard casting,malleable cast iron, hard alloy steel, aluminum alloy, copper alloy, bearing steel etc. Also suitable for surface quenched steel, surface heat treating and chemical treating materials, sheet, zinc layers, chrome layers, tin layers etc.
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