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Machine tool spindle system provided with pretightening force adjusting device

A technology of preload adjustment and machine tool spindle, which is applied in the field of CNC machine tools and can solve problems such as bearing sleeve drilling

Active Publication Date: 2017-05-10
SHENJI GRP KUNMING MACHINE TOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this control structure is that the bearing sleeve needs to be drilled, so if there are complex parts outside the bearing sleeve, the structure of the entire main shaft needs to be greatly changed

Method used

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  • Machine tool spindle system provided with pretightening force adjusting device
  • Machine tool spindle system provided with pretightening force adjusting device
  • Machine tool spindle system provided with pretightening force adjusting device

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Embodiment Construction

[0023] In order to make the purpose, technical solution and advantages of the invention clearer, the invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0024] refer to image 3 , the machine tool spindle system with preload adjustment device provided by one embodiment of the present invention includes a spindle 1, a first ball bearing 2 and a second ball bearing 3, an inner spacer 4, a cooling jacket 5, a piston element 6 and a pressure measuring Element 7. The spindle system is symmetrical about the cente...

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Abstract

The invention provides a machine tool spindle system provided with a pretightening force adjusting device. The machine tool spindle system comprises a spindle, a first ball bearing and a second ball bearing which sheath the spindle at intervals, an inner spacer bush, a cooling jacket, a piston element and a pressure measuring element, wherein the inner spacer bush sheathes the spindle and is arranged between the first ball bearing and the second ball bearing, and the two ends of the inner spacer bush respectively prop against the inner ring of the first ball bearing and the inner ring of the second ball bearing; the cooling jacket surrounds the spindle and is in respectively fit with the outer ring of the first ball bearing and the outer ring of the second ball bearing; the piston element is arranged on the cooling jacket and used for pushing the outer ring of the first ball bearing to move axially; and the pressure measuring element is arranged on the cooling jacket and used for acquiring a load born by the outer ring of the second ball bearing. The machine tool spindle system provided by the invention has the advantages that other spindle parts and structures do not need to be changed and the machine tool spindle system can be applicable to any bearing configuration way.

Description

technical field [0001] The invention relates to the field of numerically controlled machine tools, in particular to a machine tool spindle system with a pretightening force adjusting device. Background technique [0002] The magnitude of the pretightening force of the spindle bearing of the CNC machine tool has an important influence on the dynamic characteristics of the spindle of the high-speed machine tool. At present, the spindle preloading methods mainly include positioning preloading and constant pressure preloading. The size of the preloading force is determined comprehensively by taking into account the factors of low speed, high torque and high speed, high power. For the low-speed section, the pre-tightening force is relatively small, and the system's ability to resist forced vibration and self-excited vibration is weak, and it often shows that the remaining vibration marks on the processed surface of the workpiece are more obvious. For the high-speed section, the ...

Claims

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Application Information

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IPC IPC(8): B23B19/02
CPCB23Q1/70
Inventor 袁胜万崔岗卫寸花英朱祥余颖
Owner SHENJI GRP KUNMING MACHINE TOOL
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