Method and equipment of machining reducing deep hole with small mouth and large middle part

Abstract

The invention relates to a method for machining reducing deep hole with small inlet and large middle and its equipment. It is characterized by that mounting the boring-turning device with cutter headregulating mechanism on the boring rod, feeding it into deepest place of the through deep hole machined by using existent technique, using a special device and making it pass the regulating hole communicated with the trough deep hole and being on same axis, and feeding it into the cutter head regulating mechanism outside the workpiece, and can make in-hole cutter regulating, and utilizing regulating ring to change the axial displacement or regulating cone into radial displacement of cutter head to attain the goal of changing outside diameter size of cutter edge. It can machine the reducing deep hole whose reducing ratio is greater than 1 and less than or equal to 1.2 and ratio value of depth and bore diameter is greater than or equal to 50.

Description

Technical field [0001] The invention relates to the field of deep hole processing, in particular to a method for machining a variable diameter deep hole with a small entrance and a large middle for machining, and a boring device designed for realizing the method. Background technique [0002] As we all know, in the machining industry, drilling, turning, milling, boring, and grinding methods are commonly used to process assembly holes with different diameters and different depths on the workpiece. However, the existing processing technology and device can only solve the problem of shallow hole processing, deep holes with the same radial basic size, and stepped deep holes with correspondingly large to small radial sizes from shallow to deep. "Hole Machining Technology" by Wang Shiqing (Petroleum Industry Press, October 1993, Beijing), Holden J. Swinhardt, USA, "Deep Hole Machining" translated by Guan Guangjin, (National Defense Industry Press , 1974, Beijing) and other works descri...

AI Technical Summary

Problems solved by technology

However, the existing processing technology and devices can only solve the problem of shallow hole processing, deep holes with uniform radial basic dimensions, and step-shaped deep holes with corresponding radial dimensions from shallow to deep.

"Hole Machining Technology" by Wang Shiqing, (Petroleum Industry Press, October 1993, Beijing), American Holden J. Swinhart, "Deep Hole Machining" translated by Guan Guangjin, (National Defense Industry Press , 1974, Beijing) and other works have discussed the above-mentioned technologies in detail, but none of them mentioned how to solve the technical problem of variable-diameter deep hole processing with a small entrance and a large middle.

However, it is difficult to effectively increase the radial dimension of the variable-diameter deep hole by using unconventional processing methods such as honing and electrolysis. For example, even if the honing method is used to achieve a small amount of variable diameter such as 0.3 mm, the processing is very difficult. Difficult, and the processing cycle is long, low efficiency, high cost; and if the electrolysis method is used, the process is very complicated, and the accuracy is difficult to guarantee

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