JPS62228339A - Rotating gib device - Google Patents

Abstract

PURPOSE:To enable a clearance between turn sliding surfaces to be easily adjusted, by forming mutually engaging tilt surfaces in an opposed surface between a member, to which a gib is fixed, and the gib and changing a relatively engaging position between these tilt surfaces. CONSTITUTION:A gib 15 is formed into a circular arc shape with a supporting shaft 13 serving as the center, and supporting pieces 16 are protrusively provided in plural parts in the outer edge of said gib, while a gib retaining plate 17 is fixed to the supporting piece 16 by a bolt 18. While a positioning block 19 is fixed to an attachment 11 by a bolt 20 corresponding to the position of said supporting piece 16. The gib retaining plate 17 is fixed to said positioning block 19 by a bolt 22 through a spacer 21, in which thickness is adjusted, so that the gib 15 is fixed to the attachment 11. While mutually engaging tilt surfaces are formed in a side surface, where the gib 15 is opposed to the attachment 11, and the gib 15 can be finely moved to be adjusted by changing a thickness of the spacer 21 so as to change a relatively engaging position between these tilt surfaces.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a rotating gib device used for a sliding surface in a turning motion, and is suitable for use in a sliding portion of a turning attachment of a large machine tool. I'll go.

<Conventional technology> Some gantry-type NC milling machines use an attachment that has a cutter attached to the tip and is rotatably supported by the head, and the position of the cutter at the tip can be changed by rotating the attachment. This makes it possible to perform various types of processing.

<Problems to be Solved by the Invention> However, in the swinging sliding surface that supports the attachment in a swingable manner, especially in the case of swinging in a vertical plane,
It is difficult to adjust the gap in the axial direction, and as a result, the rigidity of the attachment during rotation cannot be increased, resulting in a problem that heavy cutting cannot be performed. Furthermore, attachments with swivel mechanisms also have a similar problem in one of their moving parts.

The present invention is intended to solve the conventional problems in the sliding part of such a turning movement, and an object of the present invention is to provide a rotating gib device that can easily adjust the gap of the turning sliding surface. It is said that

Means for Solving the Problems> The configuration of the rotating gib device according to the present invention to achieve this object is to interpose an arcuate gib between opposing surfaces of members that relatively slide and turn. At the same time, an inclined surface that engages with each other is formed on the opposing surface of the member to which the gib is fixed and the gib, thereby adjusting their relative engagement position. The present invention is characterized in that the gap between the facing surfaces of the other member and the gib can be adjusted by changing the gib.

<Operation> When the fixed position of the gib relative to the member is adjusted to change the relative engagement position between the gib and the inclined surface of the member, the gib approaches and moves away from the other member, and the gap between the gib and the member is easily closed. adjusted.

<Example> Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a side view of a turning attachment for a machine tool equipped with a rotating gib device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof.

In FIGS. 1 and 2, the attachment 11 rotatably holds a cutter 12 at its tip, and a support 13 is fixed to the middle part, and the support 1113 is rotatably supported by the bracket 14. As a result, the attachment 1] is able to pivot around the support shaft 13.Both sides of the support @ 13 outside 3q of the attachment 11 and the inner surface of the bracket 14 facing them are provided with rotational motion. A sliding surface is formed, and a gib 15 is interposed between one of the opposing surfaces.

This gib 15 has an arcuate shape centered on the support shaft 13, and has support pieces 16 protruding from a plurality of locations on its outer edge, and a gib holding plate 17 is fixed to the support piece 16 with bolts 18. ing. On the other hand, a positioning block 19 is fixed to the attachment 11 with a bolt 20 corresponding to the position of the support piece 16, and the gib holding plate 17 is bolted to this positioning block 19 via a spacer 21 whose thickness is adjusted. 22, thereby giving 1
5 is fixed to the attachment 11. In addition, sloped surfaces that engage with each other are formed on opposing sides of the gib 15 and the attachment 11, and by changing the thickness of the spacer 21, the relative engagement position between them can be changed. can be finely adjusted in the left-right direction in FIG. 2, thereby adjusting the gap between the facing surfaces of the gib 15 and the bracket 14.

Roughly speaking, where the gib 15 and the attachment 11 face each other, a circular fluid pressure chamber 23 is recessed on the attachment 11 side, and a sealing O-ring 24 is attached to the periphery of the chamber. A pipe 25 communicates with the fluid pressure chamber 23 from the inside of the attachment 11, so that pressure fluid can be supplied to the fluid pressure chamber 23 from a pressure source such as hydraulic pressure (not shown) through the pipe 25.

Therefore, according to such a configuration, by adjusting the thickness of the spacer 21, the gap between the gib 15 and the bracket 14 can be easily made appropriate. Furthermore, when pressure fluid is supplied to the fluid pressure chamber 23, the pressure causes the gib 1 to
5 is biased toward the bracket 14, the gap between them is reduced, and play in the attachment 11 can be eliminated.

<Effects of the Invention> As specifically explained above using one embodiment, according to the present invention, the turning IF! The clearance between the erect surfaces can be easily adjusted, thereby reducing the clearance and increasing rigidity during turning. Therefore, if this is used in a turning attachment of a machine tool, heavy cutting becomes possible due to improved turning rigidity.

[Brief explanation of drawings]

FIG. 1 is a side view of a turning attachment for a machine tool equipped with a rotating gib device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. In the drawings, 11 is an attachment, 14 is a bracket, 15 is a gib, 21 is a spacer, and 23 is a fluid pressure chamber. Patent applicant Mitsubishi Heavy Industries, Ltd. sub-agent Patent attorney Mitsuishi Dobe (and 1 other person) Figure 2

Claims (3)

[Claims] (1) An arc-shaped gib is interposed between opposing surfaces of members that make relative sliding and turning movements, and is fixed to one of the members in a position-adjustable manner, and the member to which the gib is fixed and the gib A gap between the opposing surfaces of the other member and the gib can be adjusted by forming inclined surfaces that engage with each other and changing their relative engagement positions. Rotating gib device. (2) A rotating gib device according to claim 1, wherein the gib is fixed to the member via a spacer whose thickness is adjusted to adjust the position of the gib relative to the member. . (3) A fluid pressure chamber is formed where the member to which the gib is fixed faces the gib, and pressure fluid is supplied to the fluid pressure chamber to urge the gib toward the other member. A rotary gib device according to claim 1, characterized in that: