Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
INVESTIGATION OF THE EFFECT OF HELIX ANGLE VARIATION ON INTERNAL THREADING
Submission Author:
RAPHAEL SILVA LINS , MG , Brazil
Co-Authors:
RAPHAEL SILVA LINS, Paulo Sergio Martins, Marcio Bacci Da Silva
Presenter: RAPHAEL SILVA LINS
doi://10.26678/ABCM.COBEM2023.COB2023-0065
Abstract
Threading is one of the most used manufacturing processes in modern industrial products. Stoppages in production lines in the automotive industry can be caused by loss of quality and breakage of taps in the threading process. These stops entail losses of the item's added value at each stage, adding to the losses related to the tool costs and all the time spent on a production line. Breakages of cutting tools are mainly caused by the clogging of the exit channel caused by chips, which generates an increase in the torque value in the tap. This condition often damages the coating and compromises machining. For this, studies have been developed with the objective of analyzing the influence of the helix angle in the manufacturing process by threading. In this work, the effects of varying the helix angle on cutting forces with M8 taps of HSSE with a pitch of 1.25 millimeters coated with DLC were evaluated. Machining was carried out on a machining center at the CNC Machining Center, model 1250D, manufactured by ROMI, with three axes. Tools with two different helix angles 15º and 45º and pressurized cutting fluid with constant working pressure of 35 kgf.m-2, with cutting speed of 40 m.min-1 and 60 m.min-1, were fixed in a threading head with compensation axial, Softsynchro® Modular in all experiments. The material used in the tests was the AA6063 aluminum alloy and the torque in non-passing threaded holes were measured. For statistical analysis, a complete factorial design with 2 factors and 2 levels was used, ANOVA was used to evaluate the effects of each level of the investigated factors. According to the results obtained, it can be concluded that the tool with a helix angle of 15º presented the highest torque values.
Keywords
helix angle, Non-passing holes, Torsion Moment, Alluminum Alloy
