Micro-hole drilling method based on combination of cutting fluid ultrasonic cavitation and tool vibration

Abstract

The invention discloses a micro-hole drilling method based on combination of cutting fluid ultrasonic cavitation and tool vibration, the chip breaking and chip discharging capacity can be improved according to the characteristics of micro-hole drilling process; the drilling force and the torque are lowered; the surface quality and the dimension and shape precision of the hole are improved; by adopting the micro-hole drilling method, precise drilling of a micro-hole can be realized; the method mainly comprises the steps that a drilling tool is arranged on a drilling main shaft; axial ultrasonic vibration is applied to the drilling tool by utilizing the vibration function of the drilling main shaft; a to-be-processed part is placed in a box containing water-based cutting fluid, so that the cutting fluid inundates the to-be-processed part; one end of the vibration rod of an ultrasonic vibration device is arranged near the to-be-processed part in the cutting fluid; and axial ultrasonic vibration is applied to the vibration rod through an ultrasonic generator, so that the ultrasonic cavitation effect of the cutting fluid is activated. The precise drilling of the micro deep hole is realized through the ultrasonic vibration effect of the drilling tool and the ultrasonic cavitation effect of the cutting fluid.

Description

technical field [0001] The invention belongs to the field of precision manufacturing, and in particular relates to a micro-hole drilling method based on the combination of cutting fluid ultrasonic cavitation and cutter vibration. Background technique [0002] Micro-hole parts are increasingly used in important national industries such as aviation, aerospace, ships, power, microelectronics and medical equipment, such as instrument components for aerospace inertial gyroscopes, fuel injectors for aviation / automobile / ship engines, turbine engines Air film cooling holes of blades, computer print heads, printed circuit boards, etc. These parts with tiny holes are mostly high-strength steel, stainless steel and other high-temperature-resistant, corrosion-resistant, high-strength difficult-to-machine materials. With the continuous emergence of high-performance and new difficult-to-machine materials and the continuous improvement of precision requirements for micro-hole machining, th...

AI Technical Summary

Problems solved by technology

With the continuous emergence of high-performance and new difficult-to-machine materials and the continuous improvement of precision requirements for micro-hole machining, the traditional drilling process can no longer meet the processing quality requirements of micro-holes

[0003] The large length-to-diameter ratio and small hole diameter of tiny holes bring great difficulties to drilling process equipment and process control.

During ordinary drilling of small holes, it is difficult to break and remove chips, and the path of chips is long, which is prone to blockage, which intensifies the friction and scratches between chips and the hole wall, which seriously affects the life of the tool and the surface quality of the hole; Moreover, due to the large drilling force and torque and the unbalanced radial force of the tool, the tool will be offset and tilted during drilling, resulting in a decrease in the accuracy of the size and shape of the machined hole.

Images