Full contact integrated boring machine spindle
An all-in-one, full-contact technology, applied in the direction of large fixed members, metal processing machinery parts, metal processing equipment, etc., can solve the problems affecting the spindle accuracy, the rigidity of the boring shaft, the reduction of the spindle accuracy, and the temperature rise, so as to avoid different thermal expansion, The effect of avoiding precision degradation and increasing the contact area
Inactive Publication Date: 2016-01-06
泰达重工机械(青岛)有限公司
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Problems solved by technology
[0002] The main shaft of the existing boring and milling machine is composed of the boring shaft and the boring sleeve in the middle part, and the wear-resistant support sleeve and the sliding key located at both ends of the boring sleeve. Among them, the interference fit is adopted between the boring sleeve and the wear-resistant support sleeve. The boring shaft is set in the boring sleeve, which is slidably matched with the wear-resistant support sleeve. The boring shaft is supported by the wear-resistant sleeves arranged at both ends. The defects of this structure are: firstly, only through the The wear-resistant support sleeves at both ends are in contact, and the middle part is not in contact. This structure makes the middle part of the boring shaft hang in the air, resulting in a significant reduction in the rigidity of the boring shaft and the accuracy of the spindle, and the cutting performance of the boring machine and the accuracy of the entire machine tool will be greatly reduced. ; Second, in the existing spindle structure, the boring sleeve, boring shaft and wear-resistant support sleeve are processed from different materials, and their thermal expansion coefficients are very different, which will affect the boring shaft and wear-resistant support sleeve when the temperature changes. The gap between them will affect the accuracy of the spindle, especially when the spindle is stretched and stretched frequently, the temperature will rise sharply, which will cause the spindle to be stuck and cause the spindle to be damaged
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[0011] The present invention will be further described below in conjunction with the accompanying drawings.
[0012] figure 2 and image 3 It is the full-contact integrated boring machine spindle described in the present invention. The main shaft is composed of a boring sleeve 1 and a boring shaft 2. The boring sleeve 1 and the boring shaft 2 are made of the same material, which effectively avoids the difference in thermal expansion of the boring sleeve and the boring shaft due to different materials, thereby avoiding shaft jamming problems such as decreased accuracy. The outer surface of the boring shaft 2 is in contact with the inner surface of the boring sleeve 1 along the entire axial length of the boring shaft 2, which increases the contact area between the boring bar and the boring sleeve, thus greatly improving the rigidity of the boring shaft. A spiral static pressure groove 3 is provided on the surface of the inner hole of the boring sleeve 1 , that is, the contac...
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The invention relates to a spindle of a machine tool, in particular to a full-contact integrated spindle of a boring machine. The full-contact integrate spindle comprises a boring sleeve and a boring spindle. The boring sleeve and the boring spindle are made of identical materials, the outer surface of the boring spindle is in full-length contact with the inner surface of the boring sleeve along the axial direction of the boring spindle, at least one spiral static-pressure groove is formed in the surface, which is in contact with the boring spindle, of an inner hole of the boring sleeve, oil filler holes are formed in the boring sleeve and are communicated with the spiral static-pressure grooves, high-pressure lubricating oil is filled in the spiral static-pressure grooves, and high-pressure static-pressure oil films are formed between the boring sleeve and the boring spindle by the high-pressure lubricating oil. The full-contact integrated spindle has the advantages that the contact area between the boring spindle and the boring sleeve can be increased, the rigidity of the boring spindle can be greatly improved, friction force generated between the boring spindle and the boring sleeve can be reduced, and problems of spindle jamming, degradation of precision and the like can be solved.
Description
technical field [0001] The invention relates to a machine tool spindle, in particular to a full-contact integrated boring machine spindle. Background technique [0002] The main shaft of the existing boring and milling machine is composed of the boring shaft and the boring sleeve in the middle part, and the wear-resistant support sleeve and the sliding key located at both ends of the boring sleeve. Among them, the interference fit is adopted between the boring sleeve and the wear-resistant support sleeve. The boring shaft is set in the boring sleeve, which is slidably matched with the wear-resistant support sleeve. The boring shaft is supported by the wear-resistant sleeves arranged at both ends. The defects of this structure are: firstly, only through the The wear-resistant support sleeves at both ends are in contact, and the middle part is not in contact. This structure makes the middle part of the boring shaft hang in the air, resulting in a significant reduction in the r...
Claims
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IPC IPC(8): B23B19/02
CPCB23Q1/70
Inventor 祝自田
Owner 泰达重工机械(青岛)有限公司