A High-Speed Tool Holder Compensating for Centrifugal Expansion Using Liquid Plastic
A technology of liquid plastic and centrifugal expansion, which is applied to the accessories of toolholders, metal processing equipment, turning equipment, etc., and can solve the problem of the decrease of interface stiffness and radial positioning, the decrease of the contact area between the taper surface of the tool holder and the taper hole of the spindle, BT handles cannot be processed at high speeds, etc., to achieve low cost, good sealing, and good oxidation resistance
Active Publication Date: 2018-12-07
YANSHAN UNIV
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Problems solved by technology
However, as the speed increases, both the BT tool holder and the spindle taper hole will undergo centrifugal expansion. Since the centrifugal expansion of the spindle taper hole is greater than the centrifugal expansion of the BT tool holder, a radial The gap, the contact area between the taper surface of the tool holder and the taper hole of the spindle decreases, and the stiffness and radial positioning of the interface decrease, so the BT tool holder cannot be used for high-speed machining
Method used
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[0015] exist figure 1 and figure 2 In the schematic diagram of a high-speed tool holder using liquid plastic to compensate for centrifugal expansion, the tool holder is divided into two sections, one section is the chuck 1, and the other section is the tool holder body 8, and the chuck and the tool holder body pass through The screw 2 is connected, and the front end of the main body of the knife handle is provided with a V-shaped undercut groove 3. The main body of the knife handle is a hollow structure. Two sections of expansion walls are formed, and a mandrel 7, a disc spring 10 and a liquid plastic 6 are arranged inside the cavity of the main body of the knife handle. There is a small boss on the top, a big boss on the other side, and an annular groove 14 and a ring groove 2 15 in the middle of the outer curved surface of the big and small bosses, and O-shaped seals are arranged in the grooves. Rings 5 and 9 are provided with two threaded through-holes 12 and 13 symmet...
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The invention discloses a high-speed tool handle capable of compensating centrifugal expansion by virtue of liquid plastic. The tool handle is two-section type, one section is a chuck, and the other section is a tool handle main body; the chuck is connected with the tool handle main body by virtue of a screw; a V-shaped tool retracting groove is formed in the front end of the tool handle main body; the tool handle main body is of a hollow structure; conical grooves are formed in the middle part and the rear end of a cavity; a spindle, a disc spring and the liquid plastic are arranged in the cavity; a pull nail hole is formed in one end of the spindle; a large boss and a small boss are arranged at the two sides close to the pull nail hole; annular ditches are formed in the middle parts of the outer curved surfaces of the large boss and the small boss; an O-shaped sealing ring is arranged in each ditch; the spindle forms a closed cavity after being inserted in the tool handle main body; the liquid plastic is injected through a thread through hole of the large boss, and the thread through hole is sealed by an oil plug; the disc spring is arranged at the rear end of the tool handle main body and aside the small boss; and a pull rod on a machine tool tightly pulls the tool handle through a pull nail arranged in the pull nail hole. The tool handle disclosed by the invention is capable of obviously increasing the limit rotational speed, high in connection rigidity, simple in structure, easy to realize, and suitable for high-speed machining.
Description
technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a high-speed tool holder. Background technique [0002] High-speed machining is an efficient advanced manufacturing technology developed in recent decades. Because high-speed machining can effectively improve machining efficiency, reduce cutting force, and improve machining accuracy and surface quality, it is extremely important for the rapid development of the machinery manufacturing industry. meaning. The high-speed machining tool system is a key component of the high-speed cutting machine tool. The tool system mainly refers to the spindle and tool holder connection system composed of the spindle, tool holder, chuck, tool and clamping mechanism. As the link connecting the tool and the spindle, the tool holder plays an extremely important role. [0003] The BT tool holder is widely used in ordinary cutting. The BT tool holder is a single-sided positioning tool ...
Claims
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IPC IPC(8): B23B31/00
CPCB23B31/006
Inventor 王军郭好明范运杰赵连松王慧宇徐幸胡玮
Owner YANSHAN UNIV