Automatic spiral hole milling device

Abstract

The invention discloses an automatic spiral hole milling device comprising an electric spindle, wherein a connecting sleeve is sleeved on the electric spindle; a cutter is connected with one end of the electric spindle through a clamp; the connecting sleeve is arranged in a first inner hole of an eccentric small sleeve; the axial line of the first inner hole and the axial line of the outer contour of the small sleeve are arranged in an offset manner; the connecting sleeve is connected with the eccentric small sleeve through a bearing; an eccentric large sleeve and the eccentric small sleeve are spacedly arranged; the axial line of the second inner hole and the axial line of the outer contour of the eccentric large sleeve are arranged in the offset manner; a groove is formed along the outer wall of the eccentric small sleeve; a stop pin, which can be inserted into a ring groove and be in slide fit with the ring groove, is connected to the second inner hole of the eccentric large sleeve; a second belt pulley is connected to the eccentric small sleeve through a cross coupler; a first belt pulley is connected to the eccentric large sleeve through a key; and a bearing support sleeve is sleeved on the eccentric large sleeve. According to the device, the maneuverability and the accuracy of eccentricity adjustment can be guaranteed each time.

Description

technical field [0001] The invention relates to a hole milling device, in particular to an automatic helical hole milling device. Background technique [0002] Aerospace is one of the most important components of the manufacturing industry and the industry with the most high-tech enrichment. Modern aircraft assembly puts forward new requirements for automatic hole making. First of all, due to the requirements of long life, stealth, and structural interchangeability of modern aircraft, high-quality and high-precision assembly holes are required; secondly, the proportion of difficult-to-machine materials such as composite materials and titanium alloys increases, which improves the hole-making Furthermore, aircraft, especially large aircraft, require high efficiency and high quality for a large number of holes of different sizes, which also increases the difficulty of hole making. [0003] PCT application PCT / SE94 / 00085 discloses a hand tool for making holes using the above m...

AI Technical Summary

Problems solved by technology

The obvious defect of this patent is: positioning is by hand, which has a strong impact on the positional accuracy, coaxiality and surface quality of the hole, and this patent does not provide a structure with compact structure and light weight

[0004] The CNC track drilling and cutting equipment with the patent No. US 6663327B2 also uses the principle of double eccentricity, but this mechanism does not realize the eccentric zero return mechanism and the precise adjustment of the offset; nor does it have a stable level of the electric spindle perpendicular to its axis plane. solution, while its motor layout is not compact enough

[0005] The "automatic helical milling unit" with the patent number 200910306026.8 also uses the helical milling process to solve the problem of making holes in aviation difficult-to-machine materials, but this mechanism does not address the winding problem of the driving device when the small sleeve rotates during the processing and the Provides a clear and effective solution to the problem of stable rotation, and does not solve the problem of solid connection of large and small sleeves during revolution

At the same time, the manufacturing cost of using a rotating motor as a drive device for revolution is very high, and it is difficult to solve the wiring problem

[0006] The patent No. 201020263681.8 "an improved automatic helical milling device" uses basically the same processing principle and technology, but this mechanism uses double rotating motors as the drive of the revolution and eccentric system, which greatly increases the manufacturing cost of the device, and also There is no good solution to the wiring problem of the rotating motor

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