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CNC lathe large size precision direct drive spindle structure

A large-scale, spindle technology, applied in bearings, shafts and bearings, control mechanical energy, etc., can solve the same or similar reports of "large-scale precision direct drive spindle structure", poor sealing effect, uneven air pressure, etc. problems, to achieve the effect of high stability and reliability, long life and reasonable layout

Active Publication Date: 2016-06-15
宝鸡忠诚机床股份有限公司
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AI Technical Summary

Problems solved by technology

"The patented air sealing structure is a sealing type in which an air inlet enters the annular groove. The air pressure of this structure is uneven on the circumference, and the sealing effect is poor.
[0006] In a further literature search, no report identical or similar to the subject of the present invention "large-scale precision direct drive spindle structure" has been found

Method used

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  • CNC lathe large size precision direct drive spindle structure
  • CNC lathe large size precision direct drive spindle structure
  • CNC lathe large size precision direct drive spindle structure

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Embodiment Construction

[0028] Such as Figure 1-4 Specific embodiments of the invention are given.

[0029] in the structure Figure 1-2 Among them, the hydraulic oil inlet of main shaft case 1 enters the static pressure chamber of the front and rear hydrostatic bearings to form a hydrostatic oil film, and the inner cavity at the bottom of the main shaft case is a supporting member. A static pressure cavity is formed between the rear static pressure bearings 5, and the hydraulic oil passes through the hydraulic oil leakage cavity on the main shaft housing, and flows out the leakage oil through its hydraulic oil outlet. The electric motor is a power drive system, placed between the front and rear hydrostatic bearings, and drives the main shaft 2 to rotate and work. It is characterized in that: the large-scale precision direct drive spindle is adopted, the structure is simple, the layout is reasonable, the practical application is strong, the work stability is good, the reliability is high, the spee...

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Abstract

The invention discloses a large-size high-speed precise direct-drive spindle structure of a numerical-control lathe, belonging to the technical field of mechanical engineering. The spindle structure is an organic combination of a dynamic and static hydraulic technique and an electric spindle technique and is a high-speed precise direct-drive spindle unit capable of being in large size and provided with dynamic and static hydraulic bearings and a built-in motor. The motor is mounted between a front static bearing and a back static bearing, and thus, the spindle bearing span is expanded through the direct-drive structure. Since external action of an intermediate transmission link is omitted, the spindle is stressed with a circumferential rotation torque rather than a radial drive force when the motor drives the spindle to rotate; the spindle without being impacted by intermediate transmission is more stable in running at a high speed and part processing precision is higher. Due to a circumferential uniformly-distributed multi-point exhausted sealing structure, pneumatic pressure is uniform while sealing effect is good. The large-size high-speed precise direct-drive spindle structure has the advantages of high rotational speed and precision, high rigidity, low noise, long service life, good running stability and high reliability, and can be used for spindles of precision processing machinery and high-speed and high-precision equipment.

Description

technical field [0001] The invention relates to a large-scale high-speed precision direct-drive spindle structure applicable to a full-function numerical control lathe in the technical field of mechanical engineering. Background technique [0002] CNC machine tools are the mainstream products of the machine tool industry. High-speed precision CNC machine tools are the technical foundation and development trend of the equipment manufacturing industry at home and abroad, and are a strategic industry of the equipment manufacturing industry. The working performance of high-speed precision CNC machine tools depends on the performance of one of its key components, the spindle. The high-speed precision spindle system is one of the key technologies of CNC machine tools. [0003] At present, in domestic and foreign CNC lathes, rolling bearings are mainly used in high-speed precision spindle units, but compared with dynamic and static pressure bearings, these bearings have small load ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B19/02F16C32/06F16J15/16H02K7/08
Inventor 苏忠堂高利强李士船李玉朝
Owner 宝鸡忠诚机床股份有限公司
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