A helical hole milling device with automatic hole diameter adjustment and its working method

Abstract

The invention discloses a spiral hole milling device capable of automatically adjusting a hole diameter and a working method of the spiral hole milling device. The device comprises a tool, an inner sleeve, an outer sleeve, a splitting type moment motor, an electromagnetic clutch, a rotary translation mechanism, an air cylinder, a linear feeding mechanism and a positioning device, wherein the rotary translation mechanism is composed of a movable ring, a transition ring, a fixed ring, front connection rods, rear connection rods and a pin shaft. According to the spiral hole milling device, offset is changed by using the double eccentric sleeves and the double eccentric sleeves rotate relatively. The motor for driving the outer sleeve is necessary due to the need of the revolution of the tool; and the outer sleeve can rotate and the inner sleeve transversely moves and does not rotate by using the rotary translation mechanism, so that the relative rotation angle between the inner sleeve and the outer sleeve is changed. The mechanical locking of the fixed ring is realized in an air cylinder compaction manner; and the structure is simple, the locking is firm and the cost is low. The automatic adjustment of the offset of the tool is realized by using the splitting type moment motor for revolution and an extra power source does not need to be arranged.

Description

technical field [0001] The invention belongs to the technical field of helical milling hole processing, and relates to a helical milling device and a working method thereof for automatically adjusting hole diameters for novel materials such as composite materials, aluminum alloys, titanium alloys and other difficult-to-machine materials. Background technique [0002] Helical milling is a new technology in the aviation manufacturing industry for making holes in difficult-to-machine materials such as composite materials and titanium alloys. New materials such as composite materials and titanium alloys have been widely used in aircraft design due to their excellent mechanical and physical properties, and are used to manufacture structural components such as skins and support beams. Such structural components need to process a large number of connection holes, such as rivet holes, bolt holes, etc., during the aircraft assembly process. Composite materials and titanium alloys ar...

AI Technical Summary

Problems solved by technology

Although this type of helical milling device realizes the automatic adjustment of the eccentricity, in addition to the necessary power sources for rotation, revolution and feed, an additional power source is required to drive the eccentricity adjustment mechanism to realize the automatic adjustment of the eccentricity. Adjustment; this additional power source is often a servo motor, which makes the structure of the device complex and increases the size and weight of the entire device

When it is necessary to install the helical milling device on the manipulator, due to the increase in the overall weight, it is necessary to purchase a manipulator with a larger load-bearing capacity, which increases the cost

On the other hand, due to the increase in the number of motors to be controlled and the complexity of the control circuit, the supporting control system requires more output ports

All of the above have increased the manufacturing and use costs of the helical milling device

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