Bushing press-fit bolt and press-fit method thereof

Abstract

The invention discloses a bushing press-fit bolt and a press-fit method thereof. The bushing press-fit bolt is used for press fitting bushings into pressing sleeve holes of workpieces to be pressed and sleeved, and the center of each bushing is provided with a bushing hole. The bushing press-fit bolt comprises a pressing sleeve screw, a nut, two pressing sleeves and two flange discs; the pressing sleeve screw comprises a screw head and a screw rod, the two pressing sleeves comprise a first pressing sleeve and a second pressing sleeve, and the two flange discs comprise a head flange and a tail flange; the head flange, the first pressing sleeve, the second pressing sleeve, the tail flange and the nut are sequentially and coaxially installed on the screw rod from the screw head in a sleeving mode, and the outer diameter of each flange disc is larger than that of each pressing sleeve. By means of the structure and method, two bushings can be simultaneously press fit through one-time press-fit, the abrasive resistance of the press-fit bolt is good, the pressing sleeves and threads are all not prone to damage, the service life is long, the press-fit yield is high, the press-fit uniformity and centering performance are good, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to an auxiliary tooling in bogie production, in particular to a liner press-fitting bolt. Background technique [0002] At present, in the production of train bogies, the bushing in the workpiece to be pressed is mostly manually operated, which is inconvenient to operate, low in production efficiency, uneven in press-fitting, not closely bonded on the surface, and prone to scratches on the outer surface of the bushing. Injury, affect the assembly quality. [0003] In order to improve work efficiency and make the press-fit more uniform, our company designed a bushing press-fit bolt, but in use, it was found that the thread was easily damaged. In addition, the screw head is also easy to damage the pressure sleeve, resulting in a very low service life of the bolts and pressure sleeves, and a large number of bolts and pressure sleeves need to be produced for backup. On the one hand, the manufacturing cost is greatly increased and the...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production of train bogies, the bushing in the workpiece to be pressed is mostly manually operated, which is inconvenient to operate, low in production efficiency, uneven in press-fitting, not closely bonded on the surface, and prone to scratches on the outer surface of the bushing. Injury, affect the assembly quality

[0003] In order to improve work efficiency and make the press-fit more uniform, our company designed a bushing press-fit bolt, but in use, it was found that the thread was easily damaged

In addition, the screw head is also easy to damage the pressure sleeve, resulting in a very low service life of the bolts and pressure sleeves, and a large number of bolts and pressure sleeves need to be produced for backup. On the one hand, the manufacturing cost is greatly increased and the press-fitting efficiency is low; on the other hand, The uniformity of the press-fitted workpiece needs to be improved

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