Self-deviation-rectifying system for small-and-medium-diameter deep hole processing based on hydraulic pressure
A self-correcting, small and medium-sized technology, applied in metal processing equipment, manufacturing tools, boring/drilling, etc., can solve problems such as tool instability, insufficient tool rigidity, axis deflection, etc., to ensure processing stability and improve rigidity , the effect of eliminating adverse effects
Active Publication Date: 2020-12-15
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0003] Considering the slender characteristics of the deep hole, it is determined that the deep hole tool must also be slender, resulting in insufficient rigidity of the tool. When subjected to a large cutting force, the tool will inevitably appear unstable, resulting in the deflection of the axis
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[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0046] This deep hole processing deviation correction system is mainly used to improve small and medium diameter deep holes ( The following) axis deflection problem during processing, used in conjunction with carbide gun drills, such as Figure 1-12 As shown, the self-correcting system of the present invention includes parts such as workpieces, cutters, main and auxiliary oil circuits, and correcting bodies.
[0047] The workpiece part includes a workpiece 1 and a drill sleeve 3 .
[0048] The cutter part includes a drill bit 2 and a drill rod 4 on which a V-shaped groove 15 is opened.
[0049] The self-correcting body includes an outer sleeve 8 , an inner sleeve 5 , an elastic plug 7 , a sealing ring 9 , an external motor 12 and a supporting device 13 .
[0050] The main and auxiliary oil passages include an oil feeder 19 , a main oil passage 16 , a debri...
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The invention belongs to the field of small-and-medium-diameter deep hole processing, and particularly relates to a self-deviation-rectifying system for small-and-medium-diameter deep hole processingbased on the hydraulic pressure. The self-deviation-rectifying system comprises an inner rotation body, an outer rotation body and a driving mechanism; the inner rotation body is arranged on the periphery of a drill rod in a sleeving mode and is fixed relative to the drill rod; the position between the inner rotation body and the outer rotation body is filled with cutting liquid, so that a flow channel is formed between the inner rotation body and the outer rotation body, the flow channel comprises a plurality of wedge-shaped flow channels which are evenly distributed in the circumferential direction, and when the driving mechanism drives the inner rotation body to rotate, the cutting fluid enters the small ends from the large ends of the wedge-shaped flow channels; and a pressure flow anda shear flow are superposed to generate oil film pressure to realize self-centering and self-deviation-rectifying of the drill rod. A wedge-shaped flowing space is formed between a wedge-shaped solidbody and an outer sleeve, and in a normal state, oil film pressure of the wedge-shaped space provides circumferentially-symmetrical self-centering force; and when the drill rod deflects, the wedge-shaped space generates the oil film pressure, namely self-deviation-rectifying force, the drill rod can be 'pushed back' to the correct axis through the self-deviation-rectifying force, and self-correcting of axis deflection is achieved.
Description
technical field [0001] The invention is mainly used in the field of small and medium-diameter deep hole processing, and in particular relates to a hydraulic-based self-correcting system for small and medium-diameter deep hole processing. Background technique [0002] Deep hole processing technology originated in the manufacturing process of guns and barrels, and metal tubular firearms became the earliest deep hole parts. Before the end of World War II, the development and application of deep hole processing technology has been limited to the relatively closed field of military industry, and it is famous in the machinery manufacturing industry for its high difficulty, high cost and mystery. With the development of science and technology, deep hole processing technology has been widely used in aerospace, energy mining, automobile manufacturing, petrochemical, metallurgy, instrumentation, national defense equipment manufacturing and other industrial fields. Large size and high...
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IPC IPC(8): B23B47/00B23B41/02
CPCB23B47/00B23B41/02
Inventor 程寓钱清
Owner NANJING UNIV OF SCI & TECH
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