Research On Monitoring Online Drilling Working Conditions

Currently for radial drilling, drilling head study dynamic combination of machine tools, special machine tools, the more, but applied to the first line Balancer Monitoring of drilling power and less drilling conditions, balancing machines drilling depth control key is to determine the work piece and the drill point of contact, on the basis of self-designed drill heads on the realization of the axial force and motor current on-line monitoring, analysis of the factors that affect the durability of the drill bit wear and line monitoring the method of drilling line monitoring of working conditions were studied to improve the precision balancing machines and automation to weight helps a lot of great research value and significance.This paper describes an overview of the status of drilling head of development and research at home and abroad, and around the following aspects of the research topic:Firstly, the mechanical structure drilling head. The working principle of balancing system has been described, to determine the best placement position load the disc, and the dynamic characteristics of the spindle drill heads and finite element analysis.Secondly, the axial force and motor current online testing and drilling depth control. Analysis of axial force and motor current, respectively, the relationship between formula feed rate and spindle speed. By measuring the force of strain sensitive plate deformation detection beam axial force curve obtained by the Hall current sensors for real-time monitoring of motor current, curve fitting curve is determined based on the drill spindle axial force and the resulting current The initial point of contact with the work piece, pulsing signal to achieve the desired drilling depth by DSP control.Then, the impact bit life were studied. Analysis of the drill bit wear and damage of the main forms of responses, drill formula is deduced relationship between life and cutting parameters using linear regression analysis to determine the Taylor formula parameters. Establish a relationship with the axial force of cutting temperature between variables, tool life and relationship between the axial force and torque.Finally, drill life experiment. Selected under the premise of drilling of the theoretical tool life and live the life of comparison and analysis tool.