JPS6368339A - Cooling device of spindle for machine tool - Google Patents

Abstract

PURPOSE:To enable radiation of heat produced from a spindle, by assembling a heat pipe in the spindle body while projecting a portion thereof from the spindle body and providing heat radiation fins on said projecting section. CONSTITUTION:When a spindle body 1 is rotated through a drive gear 4 and a driven gear 5, frictional heat is produced between the outer ring, inner ring and balls of a bearing 2. Said heat is transmitted to the spindle body 1 then transported through a heat pipe 6 to the side of a radiation fins 7. Since the heat pipe 6 is assembled in the spindle body 1, it is rotated together with the spindle body 1. Consequently, the heat radiation fins 7 are provided with a relative speed with respect to the ambient air through the rotary motion. In other word, air is fed forcibly to the heat radiation fins 7, thereby the heat transported through the heat pipe 6 can be radiated efficiently.

Description

[Detailed description of the invention] [Application field J] The present invention relates to a cooling iron TLT for a spindle of a machine tool.
This invention relates to a cooling device suitable for cooling spindles of machine tools that require high machining accuracy.

(Prior art) In a machine tool fC that requires high machining accuracy, it is important to remove the heat generated by the spindle, so the spindle is cooled by the first cooling means fC using IpJ et al. There is a need.

A known accelerated spindle cooling method uses lubricating oil to cool the spindle, but this has a limited cooling capacity and cannot sufficiently cool the spindle.

By the way, in recent years VCj? For example, as introduced in the Showa Aluminum ``Thermocoil'' technical document (October 1982), technology for cooling motors, pipelines, etc. using heat vibrations was being adopted. Therefore, it is conceivable to use this technology to cool the spindle using a heat pipe, but in this case, the heat pipe is used with it fixed to the bearing housing of the spindle, that is, the heat pipe is stationary. -f't9'-1 has a structure in which the spindle is cooled by being attached to a side member and cooling the spindle periphery.

[Problem that the invention seeks to solve]

The spindle cooling method using the heat pipe described above indirectly cools the spindle, so there is a problem in that a separate cooling means is required to remove the heat generated in the spindle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device for a spindle of a machine tool, which can efficiently dissipate the heat generated in the spindle using the heat viper itself, and does not require a separate cooling means.

[Means for solving problems]

The above object is achieved by incorporating a heat pipe inside the spindle body that rotates together with the plate spindle body, making a part of the heat pipe protrude from the spindle body, and providing a radiation fin on the protruding heat pipe. .

[Effect]

When the heat pipe built into the spindle body rotates together with the spindle, the heat dissipation fins rotate and have a relative speed to the surrounding air.

This is the same situation as forcing air to the heat radiation fins, and the heat generated by the spindle and transported by the heat pipe is efficiently radiated by the heat radiation fins.

〔Example〕

Hereinafter, an embodiment of the present invention will be explained with reference to FIG.
1 shows a sectional view of a spindle part of a machine tool equipped with a cooling device according to the invention; FIG. In the figure, 1 is a spindle main body, 21-t is a bearing that supports the spindle main body 1, 3 is a bearing housing, 4 is a drive gear rotated by a motor (not shown), 5 is a spindle main body 1Vc, and a part This is a driven gear that meshes with the manufactured gear 4.

The cooling device according to the present invention includes a heat vibro, and the heat vibro is installed inside the spindle body 1 so as to rotate together with the spindle body 1. Further, a part of the heat vibro is made to protrude from the spindle body 1, and a radiation fin 7 is provided on the protruding heat vibro.

Next, the operation of this embodiment will be explained.

When the spindle main body 1 rotates through the driving gear 4 and the driven gear 5ft, frictional heat is generated between the outer ring, inner ring, and balls of the bearing 2. After this heat is transmitted to the spindle main body 1, it is transferred to the heat radiation fins by heat vibro. Heat is transported to the 7 side. Since the heat vibro is built into the spindle body 1, it rotates together with the spindle body 1.

As a result, the heat radiation fins 7 have a relative speed with respect to the surrounding air due to the rotational movement, that is, the state is the same as that of forced air blowing to the heat radiation fins 7, and the heat transported by the heat vibro is Heat is radiated more efficiently by the heat radiation fins 7.

Therefore, in this embodiment, the heat of the spindle body 1 can be efficiently dissipated without requiring a cooling means other than a heat pipe. That is, the spindle can be efficiently cooled.

〔Effect of the invention〕

According to the present invention, heat generated in the spindle can be efficiently dissipated without using any cooling means other than a heat pipe.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a spindle portion of a machine tool equipped with a cooling device of the present invention. 1...Spindle body 6...Heat pipe 7.
・Radiation fin. ,of

Claims (1)

[Claims] A spindle for a machine tool, characterized in that a heat pipe that rotates together with the spindle body is incorporated in a circular part of the spindle body, a part of the heat pipe projects from the spindle body, and a radiation fin is provided on the projecting part. Cooling system.