Tengzhou Gaodi Machine Tool Co., Ltd.
A drilling machine is a machine tool that uses a drill to make holes in a workpiece. Generally, the rotation of the drill is the main movement, and the axial movement of the drill is the feed movement. The drilling machine has a simple structure and relatively low machining accuracy. It can drill through holes and blind holes, replace special tools, and expand, countersink, ream or tap. During the processing, the workpiece does not move, the tool is moved, the center of the tool is aligned with the center of the hole, and the tool is rotated (main movement). The characteristics of a drilling machine are that the workpiece is fixed and the tool rotates.
Drilling machines are basically divided into the following categories:
Vertical drilling machine: The table and headstock can be moved vertically on the column for machining small and medium-sized workpieces.
Bench drilling machine: Bench drill for short. A small vertical drilling machine with a drilling diameter of 12-15 mm. It is installed on a bench bench and is mostly manually drilled. It is commonly used to process small holes for small workpieces.
Rocker drilling machine : The headstock can move on the rocker, the rocker can rotate and lift, and the workpiece is fixed. It is suitable for processing large, heavy and porous workpieces, and is widely used in machinery manufacturing.
Deep hole drilling machine: Specialized machine tools that use deep hole drilling to drill holes with a greater depth than the diameter (such as the deep holes of barrels, barrels, and machine tool spindles). In order to facilitate chip removal and avoid the machine being too large, it is generally It is a horizontal layout, and it is often equipped with a coolant delivery device (inputting coolant to the cutting part from the inside of the tool) and a periodic chip ejection device.
Center hole drilling machine: used for machining center holes at both ends of shaft parts.
Milling and drilling machine: The table can be moved vertically and horizontally, and the drill shaft is arranged vertically, which can perform milling.
Horizontal Drilling Machine: Drilling machine with the main shaft arranged horizontally and the headstock moving vertically.
Today, I mainly share the transmission principle of vertical drilling machines:
The main movement of a vertical drilling machine is generally driven by a single-speed motor through a gear-graded speed-change mechanism. There are also mechanical stepless transmissions. The rotation of the main shaft is changed by the motor's forward rotation. The feed of the drilling machine is expressed by the amount of axial movement of the spindle at each revolution of the spindle. In addition, the feed movement and the main movement need to maintain a certain relationship during tapping. Therefore, the feed movement of the vertical drill is determined by The main shaft comes out and shares a motion source with the main movement. The replacement mechanism in the feed motion transmission chain is usually a sliding gear transmission. The vertical drilling machine is mainly used for machining the inner surface of the workpiece, such as the key groove, flat surface or forming surface in the inner hole of the bolt.
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