Aircooled type main shaft device of numerically-controlled centre processor

Abstract

The invention relates to an air cooled main shaft device of a processing machine in a numerical control center, which comprises a mandrel unit, a shell sheathed outside the mandrel unit, a plurality of bearings arranged between the mandrel unit and the shell, a supporting cell arranged between the mandrel unit and the shell, and a fixture fixedly arranged outside the shell. An external ring surface of the shell is provided with a first ring groove which extends along the spiral axis in a surrounding way. An external interval of the supporting cell is provided with a second ring groove which is communicated with the first ring groove and extends along the spiral axis. The fixture is provided with a gas guiding channel which can lead in fluid. Best heat dissipation effect can be achieved when the fluid is led in by the gas guiding channel and flows through the first ring groove and the second ring groove. In the invention, as the fluid is led in by the gas guiding channel, then flows through the first ring groove and the second ring groove sequentially, and finally is discharged outside the shell, heat sources produced by the bearings when the mandrel unit works at the high speed can be dissipated effectively, thus leading the main shaft device to achieve better processing property and processing precision.

Description

technical field [0001] The invention relates to a processing machine, in particular to an air-cooled spindle device of a numerically controlled central processing machine which can effectively take away an internal heat source and ensure processing accuracy and processing performance. Background technique [0002] see figure 1 Shown is a schematic cross-sectional view of a combined structure of a spindle device of an existing numerically controlled central processing machine. An existing spindle device of a numerically controlled central processing machine includes a spindle unit 1, a housing 2 sleeved outside the spindle unit 1, and several A bearing 3 between them, a support unit 4 arranged between the spindle unit 1 and the casing 2 , and a fixing member 5 fixed outside the casing 2 . The casing 2 has an inner annular surface 201 , an outer annular surface 202 opposite to the inner annular surface 201 , and an annular groove 203 extending helically along the axis L and ...

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned main shaft device utilizes cold air to be introduced into the annular groove 203 to achieve the effect of cooling, but, as far as the heat source of the main shaft device is concerned, the high-speed rolling of the rolling elements 301 inside the bearing 3 is the largest heating factor. Although the above-mentioned existing spindle device has a cooling structure design, the cooling path of the cold air cannot effectively take away the heat energy generated by the bearing 3, so that the cooling effect inside the spindle device is poor and needs to be improved.

[0005] It can be seen that the above-mentioned existing numerical control center processing machine spindle device obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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