High-position-degree end face precise machining device

Abstract

The invention provides a high-position-degree end face precise machining device. The high-position-degree end face precise machining device is characterized in that two supporting shaft sleeves are installed on a common boring machine workbench, an air floating boring rod and an end face locating device penetrate through inner holes of the two supporting shaft sleeves, the two supporting shaft sleeves are centered to be kept coaxial through the air floating boring rod, and the portions between the outer circle of the air floating boring rod and the surface of the inner hole of each supporting shaft sleeve and between the outer circle of the air floating boring rod and the end face locating device are supported through compressed air films for achieving high-accuracy rotation. A front cutter and a rear cutter used for boring holes and end faces are arranged on extending sections, located outside the two supporting shaft sleeves, of the air floating boring rod. The top end of the extending section, on the side with the front cutter, of the air floating boring rod is connected with a boring machine spindle through a coupling. Compared with the prior art, a traditional mode for turning the machine tool workbench by 180 degrees for machining respectively is changed, errors caused by equipment accuracy and different lengths of boring rod cantilevers are eliminated, a traditional end face and hole machining process can be replaced, and the good practical significance is achieved.

Description

technical field [0001] The invention is a precision machining device for a high-position end face, which belongs to the technical field of mechanical processing and forming. Background technique [0002] In the processing of some frame parts, high position degree (the parallelism between the two processed end faces, the perpendicularity between the end face and the hole is better than 5μm) end face processing is always the key process of this kind of parts processing, high position degree refers to the two sides of the frame The parallelism of the processed end face and the perpendicularity between the end face and the hole on the end face are better than 5 μm. The schematic diagram of the traditional processing technology is as follows: figure 1 As shown, the working principle is to use the dial indicator D1 to align the inner hole on the side of the machined part B, fix it in the turntable E, turn the machining tool A, and process the end face C on one side. After the mach...

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Problems solved by technology

[0002] In the processing of some frame parts, high position degree (the parallelism between the two processed end faces, the perpendicularity between the end face and the hole is better than 5μm) end face processing is always the key process of this kind of parts processing, high position degree refers to the two sides of the frame The parallelism of the processed end face and the perpendicularity between the end face and the hole on the end face are better than 5 μm. The schematic diagram of the traditional processing technology is as follows: figure 1 As shown, the working principle is to use the dial indicator D1 to align the inner hole on the side of the machined part B, fix it in the turntable E, turn the machining tool A, and process the end face C on one side. After the machining is completed, the turntable E rotates 180° , and then use the dial indicator D2 to find the other inner hole of the rule, fix the part B in the turntable E again, and process the end face F on this side. This processing method is due to the fact that the processing reference is produced when processing two holes. Changes, cannot achieve the processing requirements of perpendicularity and parallelism better than 5μm

In this method, after one surface is processed, the rotary table of the machine tool needs to be turned 180° to process the other end surface. Since the two holes are used as the processing reference, the processing reference will change, except for the straight line of the guide rail of the machine tool itself. In addition, the error when the part is clamped and the rotation error of the machine tool's rotary table will affect the final processing result. Therefore, to achieve the processing requirements of verticality and parallelism better than 5μum, it is restricted by many factors.

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