How Does Precision CNC Lathe Block Noise?

1. The structure of precision CNC lathe

The precision CNC lathe is composed of a rotary shaft, a bearing, a locking disc, a hydraulic system, and an indexing mechanism. The indexing mechanism is connected to the bearing. The bearing is installed on the rotary shaft. A locking disc is fixed on the rotary shaft. There are hydraulic deformation discs and fixed discs on both sides.

The hydraulic deformation plate and the fixed plate maintain a certain gap with the locking plate respectively, and the CNC lathe is fixed on the box body with bolts. The pressure oil of the hydraulic system is connected to the inner cavity of the hydraulic deformation plate through the fixed plate, and the hydraulic deformation plate is a thin-walled disc body.

Precision CNC lathe is a high-precision, high-efficiency, automatic machine tool equipped with multi-station turret or power turret. It has a wide range of processing performance and can process straight cylinders, oblique cylinders, arcs, and various threads and grooves, worm and other complex workpieces, with linear interpolation, circular interpolation, various compensation functions, precision CNC lathes have played a good economic effect in the mass production of complex parts.

However, depending on the high-speed operation of the tool to achieve precision machining, a lot of noise will be generated during the process, resulting in extremely harsh working conditions and affecting the physical and mental health of the staff. Therefore, a protective cover is used for noise reduction treatment.

2. The characteristics of precision CNC lathe

Each wall panel is protruded with a supporting frame around the outer edge of its inner wall, and a sound-absorbing thin plate parallel to the wall panel is attached to the supporting frame, so that the wall panel, the supporting frame and the sound-absorbing thin plate are surrounded to form a sound-absorbing cavity.

There are also several sound-absorbing wedges densely covered on the sound-absorbing sheet, and each sound-absorbing wedge of the lathe is hollow, and several sound-absorbing holes are evenly distributed on the outer wall thereof.

Aiming at the defect of high operating noise of traditional machine tools, the structural improvement of each wall panel of the protective cover is carried out in combination with the double form of thin-plate resonance sound-absorbing structure and sound-absorbing wedge structure, which can efficiently absorb and weaken various types of operation generated during high-speed rotary cutting of the bed body. Noise, effective noise blocking from the perspective of controlling the propagation path.

The mechanical locking device of the rotary mechanism of the precision CNC lathe can have various forms, such as screw tightening, ferrule-type locking, hydraulic radial locking, or hydraulic wedge locking.

These locking forms have limitations, such as screw tightening and ferrule-type locking, which are generally used for manual simple mechanisms and cannot be used for automatic locking mechanisms.

Hydraulic radial locking, or hydraulic wedge locking, can be used for automatic locking mechanisms, but precision CNC lathe radial locking is suitable for mechanisms in the outer diameter direction:

However, the hydraulic wedge locking used in the plane mode is not suitable for the rotary shaft mechanism with large dead weight due to the limited contact surface between the wedge and the plane, and its locking force is small.