JP2003260623A - Vibration-isolating device of straight guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-isolating device of a simple structure which is suitably for preventing any vibration of a movable table guided by a straight guide device having rolling elements such as balls and rollers, in particular, a tool rest and a movable headstock of a machine tool, can be easily added to an existing machine, and can isolate any vibration in the right-to-left, longitudinal and vertical directions. <P>SOLUTION: This vibration-isolating device comprises a bracket 6 fitted to the movable table 4 in a direction orthogonal to the surface of a guide rail 1 in a position-adjustable manner, a vibration-isolating slider 8 fixed to the bracket, a sliding groove 10 which is formed in the vibration-isolating slider and slidably fitted to the guide rail 1, an adjustment block 11 to form one of facing faces of the sliding groove, and an adjustment screw 15 to set the position of the adjustment block. The facing side surfaces and a bottom surface of the sliding groove 10 are formed of complex resin surfaces which are slidably brought into contact with the guide rail 1. The complex resin is preferably a fluorine resin containing gun metal as a complex material. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing vibration of a moving base guided by a linear guide device having rolling elements such as balls and rollers, and particularly for preventing vibration of a tool rest of a machine tool. The present invention relates to an anti-vibration device suitable for

[0002]

2. Description of the Related Art Since a machine tool processes a work by relative movement of the work and the blade, when processing a straight line or a plane, the blade must be moved linearly with high accuracy. As a guide device for this linear movement, a sliding guide device by surface contact is generally used, but balls and rollers are incorporated for the purpose of reducing movement resistance and speeding up. A linear guide device having a rolling structure has been used. However, the linear guide device having the rolling structure has a lower vibration damping ability than the guide device having the sliding structure, and there is a problem that the surface accuracy of the machined surface is likely to be deteriorated due to the vibration during the movement.

As an anti-vibration device for solving this problem, Japanese Patent Laid-Open No. 5-116048 discloses a straight line in which the gap between the fluid tank and the slider can be adjusted and vibrations in a plurality of directions can be attenuated. A vibration damping device for a moving body guided by a rolling guide device has been proposed.

The structure is as shown in FIG.
The vibration of the column 27 coupled to the bearing 26 of the linear guide device constituted by the raceway 25 fixed to the No. 1 and the bearing 26 slidably supported on the raceway 25
And a slider block 22 fixed to the column 27 so that part of the fluid tank is immersed in the fluid tank. The viscous fluid supplied to the fluid tank vibrates the column 27. In a vibration damping device of a column 27 guided by a linear rolling guide device adapted to damp, a pair of movable slide bases in which an inclined surface is formed in the fluid tank so as to decrease toward the facing surface. 23a and 23b are provided, and two inclined surfaces parallel to the inclined surface are formed on the slider block 22.

The invention described in this publication is a vibration damping device for a moving body guided by a linear rolling guide device capable of adjusting the gap between the fluid tank and the slider and damping vibrations in a plurality of directions. It is intended to be provided. In order to achieve this object, in the device described in the above publication, a plurality of grooves 28 are provided in the slide bases 23a2, 3b at predetermined intervals in the longitudinal direction, and the slide base is screwed onto the base by bolts 29 penetrating the grooves 28. is doing. When vibration occurs, the distance between the slide bases 23a and 23b and the slider block 22 is adjusted so that the vibration becomes small. At this time, the opposing gap between the one slide base and the slider block is set so as to damp the vertical vibration of the moving body, and the opposing gap between the other slide base and the slider block attenuates the longitudinal vibration of the moving body. By so setting, the vibration of the moving body in the two directions is damped.

Further, Japanese Patent Laid-Open No. 2001-9655 discloses that
A linear guide device for a moving base of a machine tool is shown, which speeds up the approaching motion and the returning motion, and imparts rigidity and vibration damping ability according to machining conditions.

As shown in FIG. 4, the device described in this publication has a guide rail 1 fixed to a frame of a machine tool.
And a linear guide device having a rolling element 32 interposed in a sliding portion with a slider 31 which is fixed to a moving table 4 such as a tool rest or a work table and moves along the guide rail 1. A brake shoe sandwiching a brake rail provided in parallel with the hydraulic cylinder, a hydraulic cylinder 34 for urging the brake shoe 33 toward the rail, and a hydraulic table 34 for releasing a hydraulic pressure of the hydraulic cylinder 34 by a high-speed movement command signal from the moving base and cutting the same. Hydraulic pressure is applied to the hydraulic cylinder 3 by the movement command signal.
4 is provided with a control means for supplying the same.

In the apparatus shown in FIG. 4, the brake shoe 33 and the hydraulic cylinder 34 are provided in a brake unit attached to the front end surface of the slider 31 in the figure, and the pair of brake shoes 33 are provided on the guide rail 1 or. The brake rails are arranged opposite to each other so that they are sandwiched from the side.

[0009]

However, in the conventional structure shown in FIG. 3, it is necessary to separately provide two slide bases 23a and 23b in addition to the guide rails for guiding the movable table 4, and especially the movement of the movable table. When the stroke is large, a great deal of labor is required for manufacturing and assembling and adjusting the slide base with high accuracy. Further, although it is possible to prevent vibration in the left-right direction and the front-rear direction, it is not possible to prevent vibration in the up-down direction.

Further, in the conventional device shown in FIG. 4, a hydraulic device for operating the brake shoes is required and the movable table moves, so that a hydraulic hose must be used to supply the hydraulic pressure, which increases the device cost. Also, the life of the piping tends to be shortened.

Therefore, the present invention has a simpler structure and can be easily additionally mounted on an existing machine, and further effectively prevents vibration of the movable table in the left, right, front and rear, and up and down directions. An object of the present invention is to obtain an anti-vibration device for a linear guide device that can perform

[0012]

The vibration control device of the present invention comprises:
This is a vibration isolation device that is mounted on a movable table 4 that is linearly moved by being guided by a guide rail 1 with a linear guide device that incorporates a rolling element that rolls between a fixed member and a movable member. The vibration isolator according to the present invention is formed on a bracket 6, which is mounted on a moving table 4 so that the position of the guide rail 1 can be adjusted in a direction perpendicular to the plane of the guide rail 1, a vibration isolation slider 8 fixed to the bracket, and a vibration isolation slider. A slide groove 10 slidably fitted to the guide rail 1, an adjusting block 11 forming one of the facing surfaces of the sliding groove, and an adjusting screw 15 for setting the position of the adjusting block. The sliding groove 10 is characterized in that the opposite side surfaces and the bottom surface are composite resin surfaces that are in sliding contact with the guide rail 1.

As the composite resin surface, a resin surface of a fluororesin containing gunmetal as a composite material is particularly preferable. Further, the vibration damping device of the present invention is suitable as a vibration damping device for a moving base of a machine tool, and is particularly suitable for a vibration damping device for a tool post slide or a moving headstock slide.

In the vibration isolator having the above structure, the positional relationship between the vibration isolator slider 8 and the guide rail 1 can be easily adjusted by adjusting the mounting position of the bracket 6, and one of the opposing sliding surfaces can be adjusted. Since it is provided on the adjusting block 11 whose position can be set by the adjusting screw 15, the interval between the sliding surfaces facing each other can be easily adjusted by the adjusting screw 15 according to the width of the guide rail 1. Since the sliding surface of the anti-vibration slider 8 comes into contact with the guide rail 1 from the upper and left and right directions, and the sliding contact surface is a resin surface, a large vibration damping capability is provided in the left and right and up and down directions. You can Further, in the front-back direction of the movable table 4, by supplying the lubricating oil between the guide rail 1 and the sliding surface of the vibration-proof slider 8, the lubricating oil can be absorbed with the viscosity in the shearing direction. Furthermore, by using a resin surface containing a composite material such as gun metal as the material of the sliding surface of the vibration-proof slider, it is possible to reduce the movement resistance when the moving table 4 moves at high speed.

[0015]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS.
An embodiment of the present invention will be described. The figure is a view showing an example in which the vibration damping device of the present invention is provided on a tool post slide of a lathe. In the figure, reference numeral 1 denotes a guide rail fixed to a fixed-side member (frame or lower-layer moving base) 2, which is fixed in parallel to both sides of a concave groove 3 on the upper surface of the fixed-side member 2. Reference numeral 4 is a movable table (a slide of a tool post).
Is being guided to. In the center of the lower surface of the moving table 4, a cylindrical groove 5
Is provided so as to project downward, and a nut member that is screwed into the feed screw arranged in the concave groove 3 of the fixed side member is fitted and inserted in this cylindrical groove 5 portion.

The bracket 6 shown in FIG. 2 is fixed to the end surface of the movable table 4 above the rails 1 on both sides with bolts 7. The bracket 6 has an L-shape when viewed from the lateral direction, and a vibration-proof slider 8 is fixed to the lower surface side of the bracket 6 with four bolts 9. The anti-vibration slider 8 has a downward U-shaped cross section, and a sliding groove 10 fitted into the guide rail 1 is provided on the lower surface. On one side wall of the sliding groove 10,
The adjustment block 11 is mounted, and behind it, two guide holes 12 and a screw hole 13 in a direction for sandwiching the guide rail 1 are provided. The adjustment block 11 is in the shape of a rectangular plate, and two guide pins 14 are erected on the back surface of the adjustment block 11. The guide pins are slidably fitted in the guide holes 12 of the vibration-proof slider. . Screw hole 13
A hexagon socket head screw 15 is screwed into the.

Fluorine resin plates 16a, 16b and 16c containing gun metal as a composite material are attached to both side surfaces (immovable side and adjustment block) and the bottom surface of the sliding groove 10.

The vibration isolator constructed as described above adjusts the parallelism between the guide rail 1 and the sliding groove 10 at the fastening portion between the vibration isolating slider 8 and the bracket 6 when it is mounted on the moving table 4. It is possible to adjust the sliding gap between the guide rail 1 and the bottom surface of the sliding groove 10 and the non-moving side surface at the fastening portion between the bracket 6 and the movable table 4. And hexagon socket head screw 1
By pushing the adjustment block 11 with 5, it is possible to adjust the interval between the sliding surfaces facing each other in the width direction and the guide rail 1. The anti-vibration device mounted in this manner moves in a state where both side surfaces and the upper surface of the guide rail 1 are in surface contact with the sliding surface of the composite resin, and the vibration generated in the moving table 4 at the time of this movement is eliminated. Absorb.

[0019]

The anti-vibration device of the linear guide device of the present invention described above has a simple structure and is easy to manufacture, requires no troublesome assembly and adjustment, and can be installed in the up / down / left / right and front / rear directions of the moving table. Vibration can be effectively prevented. Further, there is an effect that the resistance of the moving table when moving at a high speed is small, and the existing table can be easily mounted.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional front view showing a state in which an anti-vibration device of the present invention is attached to a movable table.

FIG. 2 is an exploded perspective view of the vibration damping device of FIG.

FIG. 3 is a front view of a conventional vibration damping device.

FIG. 4 is a partially sectional front view of another conventional device.

[Explanation of symbols]

1 Guide rail 4 mobile platform 6 bracket 8 Anti-vibration slider 10 Sliding groove 11 Adjustment block 15 Hexagon socket head screw

Claims (3)

[Claims] 1. A vibration isolator mounted on a movable table (4) which is linearly moved by being guided by a guide rail (1) by a linear guide device having a rolling element which rolls between a fixed member and a movable member. A bracket (6) mounted on the movable table so that the position of the guide rail can be adjusted in a direction perpendicular to the plane of the guide rail, a vibration isolation slider (8) fixed to the bracket, and a vibration isolation slider (8) formed on the vibration isolation slider. Sliding groove (10) slidably fitted to the guide rail, an adjusting block (11) forming one of the facing surfaces of the sliding groove, and an adjusting block for setting the position of the adjusting block. An anti-vibration device for a linear guide device, comprising a screw (15), wherein both side surfaces and a bottom surface of the sliding groove facing each other are composite resin surfaces that are in sliding contact with the guide rail (1). 2. The vibration isolator according to claim 1, wherein the composite resin surface is a fluororesin resin surface containing gunmetal as a composite material. 3. The vibration isolator according to claim 1, wherein the movable table is a tool post slide or a movable headstock slide of a machine tool.