Turning and grinding center of machine tool

Abstract

The invention provides a turning and grinding center of a machine tool, and aims to improve the efficiency and accuracy for machining claws of petroleum drill bits. The technical key point of the invention is as follows: the center is composed of a three-coordinate dragging device, a horizontal rotary worktable, a vertical rotary worktable and a U-shaped shaft machining feed unit; the center is equipped with an electric tool magazine, a manipulator device and an automatic detection device; a Siemens 840 DSL control system is adopted, so that an effect of six-shaft five-linkage can be achieved; and each linear shaft is equipped with a linear grating ruler, and a rotating shaft adopts a high-resolution angle encoder, closed-loop control is realized, so that the accuracy of the machine tool is improved. By using the turning and grinding center disclosed by the invention, an operation of automatically detecting the uniformly-distributed machining allowance of workpieces and an operation of automatically machining complex rotary curved surfaces under the condition of one-time loading and clamping can be realized, thereby achieving an effect of machining special-shaped workpiece claws in a turning machining mode instead of a formed grinding machining mode; and the center has the characteristics of high machining accuracy and high degree of automation, and meets the requirements on high-efficiency and high-accuracy machining.

Description

technical field [0001] The invention relates to a turning and grinding center of a machine tool, which is a machine tool that can automatically detect online and uniformly distribute the machining allowance, the U-axis machining feed unit drives the tool to move in the radial direction of the main shaft, the tool rotates and turns complex turning surfaces, and replaces the traditional forming grinding. Car mill center. Background technique [0002] Claw is the key part of oil drill bit. The journal part of this part is the main force-bearing part of the drill bit when drilling. Therefore, the material of this part has high hardness, complex shape, high processing accuracy and surface roughness. The basic requirements for the equipment for processing this part are as follows: be able to process high-hardness materials (HRC58~62); ensure the contour of complex curved surfaces; the surface roughness of the processed surface should be higher than 0.8 μm, and the key surface shou...

AI Technical Summary

Problems solved by technology

[0003] The traditional processing technology mostly uses forming grinding for grinding processing. The disadvantages of this processing method are: first, the processing efficiency is low, and it takes 60 minutes to process a workpiece; second, the grinding head needs to be repaired

Another processing method is to use a large horizontal lathe with special fixtures for turning processing. The disadvantages of this processing method are: first, the pre-sequence is required to process the clamping reference plane for this sequence; second, the workpiece is a special-shaped piece. Special fixtures are required to install the clamps and achieve dynamic balance and counterweight. The clamps are too large and the rigidity is poor; third, the diameter of the processed parts is small, the machine tool speed is low, and the turning line speed is low, resulting in poor surface roughness; fourth, processing The quantity is small, the processing efficiency is low, and it takes 40 minutes to process a workpiece

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