Publication detail

Issue of Rigidity of the Ball Screw Nut Exposed to Bending Stress during Bending Stress of the Ball Screw

NOVOTNÝ, L. MAREK, J. MAREK, T.

Czech title

Tuhost matice kuličkového šroubu vystavená napětí v ohybu při namáhání kuličkového šroubu

English title

Issue of Rigidity of the Ball Screw Nut Exposed to Bending Stress during Bending Stress of the Ball Screw

Type

conference paper

Language

en

Original abstract

Ball screws and nuts represent the inseparable part of machinetool building. The thread lead accuracy ranges in hundredths of millimetres per 1 m. In addition to the undesirable phenomena caused by heat (dilatability) and, e. g., torsional and transverse oscillations, the bending stress of the ball screw is considerably undesirable too. This stress and at the same time behaviour are transferred to the bending stress of the ball screw nut. This has a very harmful influence on setting of the ball screws, when the machine tool is assembled. Using the analysis by means of the FEM method, the paper conducts a survey of deformation issue of the arrangement "machine – ball screw – ball screw nut" during the assembly stage as well as a survey of compensation possibilities and other technical measures determined to limit the undesirable deformations and stress of the ball screw originating already in the manufacturing stage of the machine tool.

Czech abstract

Kuličkové šrouby a matice jsou nedílnou součástí při stavbě obráběcího stroje. Přesnost závitu se pohybuje v setinách mm na 1 m. Vedle nežádoucího jevu způsobené teplem (roztažnosti) , e. g., torzní a příčné kmity, ohybové namáhání kuličkového šroubu je nežádoucí. Toto napětí a chování je převedeno na ohybové namáhání na matici kuličkového šroubu. To má velmi špatný vliv na nastavení kuličkových šroubů, když je obráběcí stroj smontován. Pomocí analýzy metody konečných prvků, papír provádí průzkum deformace v uspořádání "stroj – kuličkový šroub – matice kuličkového šroubu" během fáze montáže, stejně jako přehled o možnostech kompenzace a dalších technických opatřeních určených k omezení nežádoucích deformací a napětí kuličkového šroubu již ve výrobní fázi obráběcího stroje.

English abstract

Ball screws and nuts represent the inseparable part of machinetool building. The thread lead accuracy ranges in hundredths of millimetres per 1 m. In addition to the undesirable phenomena caused by heat (dilatability) and, e. g., torsional and transverse oscillations, the bending stress of the ball screw is considerably undesirable too. This stress and at the same time behaviour are transferred to the bending stress of the ball screw nut. This has a very harmful influence on setting of the ball screws, when the machine tool is assembled. Using the analysis by means of the FEM method, the paper conducts a survey of deformation issue of the arrangement "machine – ball screw – ball screw nut" during the assembly stage as well as a survey of compensation possibilities and other technical measures determined to limit the undesirable deformations and stress of the ball screw originating already in the manufacturing stage of the machine tool.

Keywords in English

Ball Screw, Bending Loading, FEM Calculations, Geometric Precision, Laser, Machine Tool, Machine Tool Axis, Nut

RIV year

2015

Released

11.05.2015

ISBN

978-80-86246-42-0

Book

Engineering mechanics 2015 - extended abstracts

Edition number

1

Pages from–to

214–215

Pages count

390

BIBTEX


@inproceedings{BUT118757,
  author="Lubomír {Novotný} and Jiří {Marek} and Tomáš {Marek},
  title="Issue of Rigidity of the Ball Screw Nut Exposed to Bending Stress during Bending Stress of the Ball Screw",
  booktitle="Engineering mechanics 2015 - extended abstracts",
  year="2015",
  month="May",
  pages="214--215",
  isbn="978-80-86246-42-0"
}