Main shaft universal bracket for engraving and milling machine

Abstract

The invention relates to a main shaft universal bracket for an engraving and milling machine, which is characterized by comprising a fixing sleeve movably arranged on the head of the engraving and milling machine, wherein the fixing sleeve is connected with a ball joint body which tightly fixes a ball joint press cover; the ball joint press cover and the ball joint body are internally provided with a ball socket, and the ball socket is internally provided with a universal ball joint; and the universal ball joint is movably provided with a motor through a clamping head, and a motor shaft is connected with a cutter. The fixing sleeve and the machine head are movably arranged, and the fixing sleeve can be arbitrarily rotated at 360 degrees around the machine head. The universal ball joint isrotated in the ball socket so as to ensure that the clamping head, the motor and the cutter also can be arbitrarily rotated at 360 degrees, and moreover, the angle of the ball joint and the ball socket can be inclined. The rotation of the clamping head, the motor and the cutter greatly increases the range of milling so as to ensure that the cutter can be flexibly rotated and can mill any surfaces.In addition, the fixing sleeve, the universal ball joint and the clamping head are connected with the motor so as to increase the working stroke and improve the processing capability. The motor directly drives the cutter, thus an intermediate link is reduced, and the transmitting power is enlarged.

Description

technical field [0001] The invention relates to an engraving and milling machine, in particular to a universal support for the main shaft of the engraving and milling machine, and belongs to the field of machine tools. Background technique [0002] Engraving and milling machines are widely used in the processing of metal materials such as plastic molds. However, the cutters of existing engraving and milling machines are directly installed under the main straight axis, so the cutters can only be used for vertical machining, and it is difficult to process surfaces with complex geometric shapes, such as curved surfaces and high-cut walls. Therefore, this The inventor developed the universal slope head of the engraving and milling machine, and applied for a Chinese patent, patent number 200510049990.9. The technical solution of this patent is to install a universally rotating ball joint in the fixed frame connected to the main shaft of the engraving and milling machine, the ball...

AI Technical Summary

Problems solved by technology

However, the cutters of existing engraving and milling machines are directly installed under the main straight axis, so the cutters can only be used for vertical machining, and it is difficult to process surfaces with complex geometric shapes, such as curved surfaces and high-cut walls. Therefore, this The inventor developed the universal slope head of the engraving and milling machine, and applied for a Chinese patent, patent number 200510049990.9. The technical solution of this patent is to install a universally rotating ball joint in the fixed frame connected to the main shaft of the engraving and milling machine, the ball joint ( A softly curved rotating shaft is installed in the hollow), and the softly curved rotating shaft is connected to the rotating spindle of the engraving and milling machine, and the softly curved rotating shaft is connected to the clamping tool bar, which breaks the traditional situation of only vertical processing, and is suitable for various complex The machining of geometric shapes has a certain effect

However, it has the following disadvantages: First, the transmission force is transmitted from the main shaft of the engraving and milling machine to the clamping rod through the curved transmission shaft, which will cause wear and consume the transmission force, and the curved transmission shaft is easy to reach the fatigue limit and be damaged, so the scope of use is short. The second is that the force of the bending drive shaft is poor and the strength is low, so the motor speed should not be high, generally 3000-4000 revolutions per minute, so the surface finish and processing speed of the processed parts are affected

So someone applied for another patent, the patent number is 200620140344.3. Its technical scheme is that the head of the engraving and milling machine is installed with a fixed seat through the connecting cylinder, the fixed seat is fastened to the gland, and a spherical cavity is formed inside the fixed seat and the gland. A universal rotating ball joint is installed in the cavity, and a motor is installed in the universal ball joint. The disadvantages are: first, because the connecting cylinder is fixed on the machine head, the connecting cylinder cannot rotate, and the universal ball joint can only rotate in the fixed seat (the rotation angle is less than 40 degrees, that is, it can be aligned with the downward centerline of the machine head) The milling range is limited; second, because the motor and the universal ball joint are connected as one, the motor and the universal ball joint cannot move or rotate with each other, resulting in poor milling ability

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