Vertical Rotary Table

The vertical rotary table is a versatile equipment that can be used to hold and position the projects and perform accurate drilling or milling and so on. Vertical rotary tables are useful for holding irregularly shaped objects, drilling evenly spaced holes in metal components with high precision. Most, but not all of the vertical rotary devices can change to a horizontal position, giving the operators more flexibility in operation and applications.

How Does a Vertical Rotary Table Work?

The basic elements of a vertical rotary table include a disc to which the products are clamped, a solid base for clamping onto another table or machine, a handle, or a CNC controller. When the operator turns the handwheel, control knob, or other components that provide input, the worm gear begins the rotation as well as the mating gear mounted beneath the table surface. The worm gears perform the precise rotations of the vertical rotary table when every part of the device is accurately calibrated in degrees.

The chuck would be used to hold the target, and a dial indicator mounted with the spindle would be helpful and effective to make sure the chuck is centered. After mounting the chuck with bolts and T-nuts and checking if the chuck is centered, the operator can clamp the project on the table.

If the operators need to position bigger pieces that the jaw chucks with inside jaws cannot hold, they should consider using the jaw chucks with outside jaws. With the precise rotations of the rotary table, the operator can perform accurate drilling or milling in a vertical position.

VMC Rotary Table

VMC is the industrial term referring to vertical machining centers. Machines with vertical machining centers have spindles that are vertically oriented. Also, a vertical machining center has a CNC (Computer Numerical Control) controller, which means the machine follows a particular coded programmed instruction without manual operators. With a CNC controller, VMC rotary table has a highly automated series of steps to precisely mill/drill or change different tools such as drills and saws. All the workpieces therefore can be clamps and mill/drill in one place on the VMC rotary table.

Typically, a vertical machining center has three axes, the X, Y, and Z-axis. When performing rotating machinery, the X-axis usually stands for the horizontal position (from left to right), the Y-axis refers to the vertical position (from front to back) while Z-axis is the centerline (up and down). The operator can also add a 4th or even 5th axis in VMC. If the operator added the 4th-axis, the cutter could rotate around the x-axis, allowing the vertical machining center to drill holes in the front and back of the targets.

Compared with an HMC (Horizontal Machining Center), VMC is easier to manage and more versatile therefore be widely used. It is highly economical, effective for metal machining, especially for processing plate-type gears.

Flexibility in Applications

Vertical rotary tables are versatile, they can serve several purposes with a few adjustments. For example, it can produce bolt circles, polygons, gears, and more in metalworking. Most of the vertical rotary tables can also be installed horizontally to cope with more machining tasks. The operator can not only adjust and position the workpiece freely but also change the custom blade or slitting saw to cut the exact profile of the gears.

You can mount the rotary table on the side vertically and perform milling or cutting horizontally with a slitting saw. The operators can also choose to bolt the workpiece directly onto the rotary table with clamps. Furthermore, having the dividing plates can divide the circle into more sections and increase the capabilities of the vertical rotary tables.

Dividing Plate

The dividing plate allows the operator to section the circle into a number of divisions accurately. A dividing plate is simple in design and easy to use. It is designed to create different amounts of holes in a pattern while using the same vertical rotary table. The machining applications are nearly unlimited with this useful tool. Below are the steps to install a dividing plate on a vertical rotary table:

● The dividing plate takes the place of the handwheel, so the handwheel needs to be removed first.
● Slide the plate onto the shaft and then screws it on the shaft.
● Slide the two-sector arms(divider) onto the plate if extra holes are required to divide the circle. Adding a clip is helpful for the divider to stay in place.
● Install the handle and calibrate its position to match the hole on the plate.
● Mount the washer and nut back onto the end of the shaft.
● Calculate the turns of the crank handle that are needed to advance a certain number of degrees between divisions.
● Rotate the handle as required.
● Advance the handle and rotate the dividers to the next starting position.

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