Hydraulic three-pawl end-driver center
A hydraulic and end-face technology, which is applied in the direction of tailstock/top, chuck, turning equipment, etc., can solve the problems of non-replacement, reduced centering accuracy, wear and passivation of claws, etc., to improve the use range and centering accuracy High, low vibration effect
Inactive Publication Date: 2015-06-03
李雨泽
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Problems solved by technology
[0003] The advantage of the tailstock force-tightened end-face-driven center is its simple structure, but the front center for positioning the workpiece is not fixed but slides, which inevitably leads to a decrease in centering accuracy
Due to the manufacturing and assembly errors of the fixture and the position error of the end surface of the workpiece, the current centrifugal end-face driven tops make the radius of the center of mass of each centrifugal body unable to maintain the same during work, which inevitably causes additional vibration, and the finger is long. Passivated by time wear and cannot be replaced, these are especially unfavorable for high-speed turning
Most of them have extremely high requirements on the vertical position of the workpiece end face, which limits the scope of application
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[0010] Such as figure 1 and figure 2 As shown, the clamp body 1 is equipped with a transposition claw seat 10, and the claw seat 11 is eccentrically installed in the claw seat. The compression spring 6 acts as a reset; the clamp body 1 is connected with the main shaft of the machine tool, and a steel oil pipe 2 is embedded in the clamp body 1, which bypasses the mandrel thimble 12, and a floating medium 13 is installed inside, and the end of the oil pipe 2 is set There is a block 14 to maintain its stability; the front cover 9 and the sleeve 3 are fixed together by the screw Ⅱ 8, the workpiece is positioned between the front top 12 and the rear top, and after the whole fixture is running with the main shaft of the machine tool, due to the floating medium 13 flow, so the floating medium 13 can be thrown out in the radial direction, and then push the finger seat 10 to move to the right, so that the cutting edge of the finger 11 is slightly embedded in the end surface of the wo...
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The invention provides a hydraulic three-pawl end-driver center which comprises a fixture, a sleeve, a stopper, a pressure spring, screws, a front cover, an ejector pin and a plugging block. The fixture is connected with a machine tool spindle, a transposable pawl seat is mounted in the fixture, pawls are eccentrically placed into the pawl seat and fixed by the screws, a pin for limiting rotation of the pawl seat is arranged on the pawl seat, a steel oil pipe is arranged in the fixture, a floating medium is placed in the steel oil pipe, the ejector pin transversely penetrates the centers of the fixture and the steel oil pipe, and the plugging block is positioned at the end of the steel oil pipe. When the hydraulic three-pawl end-driver center is used, additional vibration is low, positioning precision is high, a workpiece can be clamped within a certain size range, the use range of the fixture is widened, and the pawls can be timely replaced according to use conditions, so that subsequent turning is facilitated.
Description
technical field [0001] The invention relates to a hydraulic three-pull end-face driven top, which belongs to the field of machinery. technical background [0002] With the continuous improvement of cutting tool materials and machine tool technology, the spindle speed of CNC lathes is showing an increasing trend. For the fixtures for clamping shaft parts, the use of end-face driven tops can not only complete the alignment under one clamping condition. The turning process of all the outer surfaces of shaft parts reduces the number of clamping times and shortens the auxiliary time of clamping. Therefore, the end drive center is a very important development direction. [0003] The advantage of the tailstock force-tightened end-face-driven center is its simple structure, but the front center for positioning the workpiece is not fixed but slides, which inevitably leads to a decrease in centering accuracy. Due to the manufacturing and assembly errors of the fixture and the positio...
Claims
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IPC IPC(8): B23B23/00
CPCB23B23/04B23B31/302
Inventor 李雨泽
Owner 李雨泽