the dividing head is a machine tool attached to the milling machine for dividing the workpiece into any part of the machine. using the indexing ring and the cursor, the positioning pin and the indexing disc and the exchange gear, the workpiece to be mounted on the top or the chuck divided into any angle, fushun machine can be divided into arbitrary parts of the circle, auxiliary machine tools using a variety of different shapes for a variety of groove, spur gear, screw spur gear, archimedes spiral cam and other processing. grating indexing head
1 introduction
a machine accessory that holds and rotates and divides the workpiece with a chuck or with a top and a dial. dividing head is mainly used for milling machines, also used in drilling and surface grinder, can also be placed on the platform for the clamp utility line. the dividing head mainly has two kinds of general dividing head and optical dividing head.
2 structure classification
wafangdian machine according to its transmission, indexing form can be divided into worm sub-head, dial dividing head, hole plate dividing head, slot plate dividing head,
dividing head
(including the inductive indexing head and grating indexing head). according to its function can be divided into universal dividing head, semi-universal dividing head, equal division head. according to its structure and there are vertical lying head, can be dumping head, hanging beam dividing the head of the points. dividing head as a general-purpose machine tool attachment structure mainly by the clamping part, indexing part of the transmission part of the composition.
general
shenyang machine by sub-method and function can be divided into three kinds. ① universal dividing head: the most widely used. the spindle can be tilted at any angle between the horizontal and vertical directions. the indexing mechanism consists of an indexing disc and a worm-worm gear pair (see worm gear) with a gear ratio of 1:40, and the indexing plate has several different points of positioning holes. rotate the handle connected to the worm to insert the locating pin into the selected positioning hole to achieve the indexing. when the number of equal points on the indexing plate can not meet the indexing requirements, through the worm and the spindle between the exchange gear to change the transmission ratio, expand the indexing range. in the milling machine can be universal dividing the head of the exchange gear and milling machine table feed screw connected to the workpiece axial feed and rotary motion combination, according to a certain guide milling out the spiral groove. ② semi-universal dividing head: the structure and universal dividing head is basically the same, but without the exchange gear mechanism, can only use the indexing table directly, can not be linked with the milling machine table. ③ equal division head: the general use of 24 slots or holes of the sub-disk, directly to achieve 2,3,4,6,8,12,24 equally divided, horizontal, vertical and vertical lying type 3. the vertical base has two mutually perpendicular mounting surfaces, and the spindle can be in a horizontal or vertical position. the indexing accuracy of the general dividing head is generally ± 60 ".
optics
the spindle is equipped with a precision glass dial or round grating, through the optical or optoelectronic system for subdivision, amplification, and then by the eyepiece, light screen or digital device read out the angle value. indexing accuracy of up to ± 1 ", optical dividing head for precision machining and angle measurement.
cnc
cnc dividing head with ac or dc servo motor drive, complex pitch worm gear group mechanism transmission, the use of hydraulic ring-type locking device, coupled with a solid rigid seal structure.
cnc dividing head widely used in milling machines, drilling and machining centers. with the machine tool four-axis operation interface, can be used for the same four-axis processing.
cnc dividing head and sparks machine can be used for bicycles and automobile tire mold processing.
cnc dividing head can also be used with dc / ac single-axis servo controller, connected to the m-signal, for the division processing.
3 role
1) to make the workpiece around the axis of its own (equal or divided). such as hexagonal, gear, spline and so on.
2) keep the axis of the workpiece at the desired angle (horizontal, vertical or inclined) relative to the milling machine table. therefore, can be processed at different angles of the slope.
3) when milling the spiral groove or cam, it can cooperate with the movement of the table to rotate the workpiece continuously.
