Deep Hole Honing Head

Installation of the finished surface with a oil stone(also known as a honing stick) embedded in the honing head. It mainly processes various cylindrical holes with a diameter of 5 to 500 mm or more, and the ratio of the hole depth to the hole diameter can reach 1:10. The outer circumference of the honing head is set with 2 to 10 oil stones with a length of about 1/3 to 3/4 of the hole length, which rotates and moves back and forth during the boring, and is evenly raised by the spring or hydraulic control in the honing head. Therefore, the contact area with the surface of the hole is large, and the processing efficiency is high. After honing, the hole has a dimensional accuracy of IT7 and a surface roughness of Ra0.32 to 0.04 um. The amount of honing allowance depends on the hole diameter and the work-piece material. Generally, the cast iron piece is 0.02 to 0.15 mm, and the steel piece is 0.01 to 0.05 mm. The speed of the honing head is generally 100 to 200 rpm, and the speed of the reciprocating motion is generally 15 to 20 m/min. In order to wash away the chips and abrasive grains, improve the surface roughness and reduce the temperature of the cutting zone, it is often necessary to use a large amount of cutting fluid, such as kerosene or a small amount of spindle oil, and sometimes an extreme pressure emulsion.