New Spherical Surface Grinding Machine Tool and Its Grinding Method

Abstract

The invention discloses a novel spherical surface grinding machine tool and a grinding method thereof. The novel spherical surface grinding method comprises the following steps: 1) Workpiece installation: the workpiece is installed on the mandrel, and the workpiece has a spherical shape to be processed. On the surface, the headstock and tailstock of the machine tool withstand the two ends of the mandrel, and the longitudinal drive mechanism drives the machine table, headstock and tailstock to move left and right along the Y-axis direction of the machine tool, so that the spherical center of the workpiece is located on the axis of the sand table ; Start the machine tool servo motor 1 to drive the saddle to move along the X-axis direction of the machine tool, and make the sand disc buckle cover on the surface to be processed on the workpiece; 2) spherical grinding: start the motor to make the sand disc rotate at a high speed around the machine tool X axis Start the frequency conversion motor and drive the mandrel and the workpiece to rotate around the Y-axis of the machine tool at a low speed under the action of the deceleration device. Under the action of the turntable mechanism, the worktable, headstock, tailstock and workpiece all revolve around the Z-axis Reciprocating rotation, and the saddle is driven forward by the servo motor 1.

Description

technical field [0001] The invention relates to a grinding machine tool and a grinding method, in particular to a machine tool for spherical grinding and a method for spherical grinding using the machine tool. Background technique [0002] With the development of society, industries such as petroleum, chemical industry, steel, coal powder and natural gas transmission, and nuclear power plants have an increasing demand for high-precision, hard spherical, and hard-sealed ball valves. High requirements, the spherical surface of this type of ball valve is cemented carbide spray welding or ultrasonic alloy welding, its hardness reaches about HRC63, the sealing seat surface is also hard contact, no longer a rubber contact seal, its sealing pressure requires 40MPa, and the soft seal is Far from reaching. The spherical surface of this type of ball valve must be ground, and its roundness requirements are very high. In addition, the surface hardness is extremely high. The traditional...

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Problems solved by technology

[0010] Although the spherical surface grinding method of the generation method can grind spheres of different specifications without changing the grinding wheel, a grinding wheel of one specification can grind workpieces of any size, and the investment in grinding tools is small. However, the grinding wheel and workpiece involved in grinding It is line contact, and there is only one line, so the grinding efficiency is low, it is not suitable for the large-scale production of spheres, only suitable for the repair industry of spheres

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