JPH10122297A - Vibration damping structure of machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a construction for forming an enclosure for concreting by making the required frame member of a structure to a cylindrical member and filling a concrete to the inside of this cylindrical member and solidifying. SOLUTION: This structure is composed of a base unit 1 arranged on the lowest part, a feeding unit 3 guided so as to slide and displace freely in front/ rear directions f1 through a rail 2 fixed on this upper surface and a column unit 5 guided so as to slide and displace freely in right/left directins f2 through a rail 4 fixed on the upper surface of this feeding unit 3. In a base unit 1, a cylindrical member 6a facing sideways and a vertical cylindrical member 6b filled by a concrete are combined in a rectangular parallelepiped shape as a whole and a stand plate 7 and the rail 2 are fixed on this upper surface. It is extremely favorable that the end surfaces of the cylindrical members 6a, 6b are closed in an air tight shape by a cover member 8. The feeding unit 3 and the column unit 5 are also combined with cylindrical members 9a, 9b 13a, 13b, 13c filled by the concreate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping type structure such as a machine tool, and the structure may be an entire structure such as a machine tool or a partial structure. It is.

[0002]

2. Description of the Related Art Generally, a base frame or the like, which is one of the structures of a machine tool, is formed so as to be hardly vibrated in order to maintain high processing performance.

For this reason, the rigidity of the frame is increased by increasing the thickness of the frame or providing reinforcing ribs.

[0004] However, since the cost of such means is high, it has recently been required to surround the outer periphery of the frame with a plate material and fill it with concrete, or retrofit and fix a concrete block at a required location. Is being done.

[0005]

As described above, it is possible to easily fill a concrete structure by surrounding the outer periphery of the structure with a plate material, and to fill it with a large machine tool. The construction is troublesome and may become inappropriate.Concrete shrinks due to evaporation of water and changes over time, causing the concrete to peel off from the board, reducing the rigidity of the structure and reducing noise. Will occur.

In addition, retrofitting a concrete block is generally troublesome in construction work, and the above-mentioned aging of the concrete causes the structure to be distorted and the mechanical accuracy to decrease over time.

An object of the present invention is to provide a vibration damping type structure for a machine tool or the like which can mainly deal with such a problem.

[0008]

In order to achieve the above object, according to the present invention, a required bone member of a structure is formed as a cylindrical member, and concrete is filled and solidified inside the cylindrical member. And

In the present invention, the required cylindrical member is filled with concrete, which eliminates the need for conventional work such as enclosing the outer periphery of the structure with a plate because of the need to fill concrete. In addition, it is possible to fill concrete into a cylindrical member at a convenient time before and after assembling, and it is possible to place concrete only in necessary places, so that effective damping action with less concrete To demonstrate.

Further, concrete densely filled over the entire cross section of the tubular member dramatically increases the rigidity of the tubular member and effectively contributes to the increase in rigidity of the entire structure. .

In the above invention, it is preferable that the concrete is hermetically sealed inside the tubular member. According to this, the concrete is shielded from the outside atmosphere by the tubular member, the evaporation and moisture absorption of the internal moisture are eliminated, and the secular change such as shrinkage and deterioration is prevented. Therefore, the concrete does not peel off from the wall surface of the tubular member, does not generate noise, and does not distort the tubular member.

In the second aspect of the present invention, instead of the above concrete, a powder-like damping material or a jelly-like damping material is hermetically sealed inside the tubular member. According to this, the vibration damping material does not increase the rigidity of the tubular member or the like as much as concrete, but because of its large mass, incompressibility, friction, etc. In this case, it has a function similar to that of concrete, and maintains fluidity forever, and can be easily taken out when needed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to FIGS. FIG. 1 shows a frame structure of a machine tool having a vibration-damping structure according to the present invention, in which a plurality of unit structures (units) having a vibration-damping structure are combined.

More specifically, a feed unit 3 which is slidably guided in the front-rear direction f1 via a base unit 1 disposed at the lowermost position, rails 2 and 2 fixed to the upper surface of the base unit 1, and this feed unit Rails 4, 4 fixed to the upper surface of 3
And a column unit 5 that is guided so as to be freely slidable in the left-right direction through the column unit 5.

The structure of each unit will be described as follows. That is, the base unit 1 has a horizontal (front-rear, left-right) orientated tubular member 6a and a vertically-oriented tubular member 6b combined as a whole in a rectangular parallelepiped shape, and the base plate 7 and the rails 2 and 2 are fixed to the upper surface. It has been done.

In the assembling, for example, the horizontal tubular member 6a is filled with concrete in a vertical posture before assembling, and the vertical tubular member 6b is assembled in the process of assembling. Fill concrete with. This is because the concrete can be easily filled in this way.

At this time, the cylindrical members 6a and 6b are generally commercially available, and it is preferable to use a steel product having a square cross section. The cross-sectional size is selected appropriately in consideration of the required strength in consideration of the ease of filling with concrete.

[0018] Concrete is used in a broad sense.
Cement concrete, mortar, cement paste,
This includes plastic concrete and asphalt concrete. The filling is performed by each cylindrical member 6.
The process may be performed on the entire length of a or 6b or on a partial length, but in any case, the filling portion is made to fill the entire cross section of the cylindrical members 6a and 6b.

Each cylindrical member 6 filled with concrete
a and 6b are airtightly closed at their end surfaces with a lid member 8 or the like,
It is highly preferred that the solidified concrete be shielded from the outside atmosphere. By doing so, it is possible to prevent aging due to contact with air, such as preventing evaporation of water in concrete.

The feed unit 3 connects a pair of horizontal tubular members 9a in the left-right direction f2 and a pair of horizontal tubular members 9b in the front-rear direction f1 in a rectangular shape, and also fixes the rails 4, 4 to the upper surface. The sliding member 10 guided by the other rails 2, 2 is fixed to the lower surface. Also in this case, the tubular members 9a, 9a
Fill b with concrete.

The column unit 5 is configured as follows. That is, referring to FIG. 1 and FIG. 2, FIG. 2 is a cross-sectional plan view in which the upper part of the unit 5 is cut horizontally, and as shown in these figures, the longitudinal side faces in the front-rear direction f1 Each of 11a and 11b is formed in a box shape provided with a slit s for inserting and arranging the spindle device 12 in a bridging manner, and sandwiches the spindle device 12 in a direction substantially orthogonal to the vertical side surfaces 11a and 11b. Opposite left and right vertical sides 1
1c and 11d are formed by horizontal and vertical tubular members 13a and 13b, respectively.

More specifically, a vertical portion forming each lateral end of the left and right vertical side surfaces 11c and 11d is formed by a vertical cylindrical member 13a extending over the entire height of the vertical side surfaces 11c and 11d. I do. And these cylindrical members 1
The front-rear and left-right directions of the upper and lower ends between 3a, 13a are joined by laterally-directed cylindrical members 13b, 13c having appropriate cross-sectional sizes. Here, the vertical cylindrical member 13a has a typical cross-sectional size of about 1/7 to 1/4 of the length of the unit 5 in the front-rear or left-right direction.

In this unit 5 as well, each cylindrical member 1
Concrete is filled into 3a, 13b, and 13c as required according to the above.

Rails 14, 14 are provided on the front surfaces of the cylindrical members 13a, 13a located at the left and right ends of the front vertical side surface 11a.
Is fixed, and guides a support guide plate 12a which forms a part of the spindle device 12.

At an appropriate position of the unit 5, an unillustrated vertical drive device for vertically displacing the spindle device 12 in a horizontal state of the spindle 12b is provided. A balance cylinder 1 is provided on the right cylindrical member 13a of the front vertical side surface 11a.
5, the tip of the piston rod 15a of the cylinder 15 is fixed to the support guide plate 12a, and the weight of the spindle device 12 and the upward force of the piston rod 15a due to the fluid pressure in the cylinder 15 are balanced. Thus, the vertical displacement of the spindle device 12 by the vertical drive device can be performed with a small amount of power.

In the unit 5, the entire frame is constituted by the vertical cylindrical members 13a and the horizontal cylindrical members 13b and 13c, which is effective in simplifying the entire structure. In addition, four vertical cylindrical members 13a
Is superior in its installation position, that is, the vertical side surfaces 11c, 11c
This contributes more effectively to an increase in the rigidity of the entire unit 5 than to a position near the center in the horizontal direction of d.

Further, the typical dimension of the cross-sectional size of the vertical cylindrical member 13a is set to about 1/7 to 1/4 of the length of the unit 5 in the front-rear or left-right direction. This makes it possible to obtain a large space economically with less work.

This unit 5 can be modified as follows.
That is, FIGS. 3 and 4 show a first modification, and FIG.
Is a perspective view of the entire unit 5, and FIG. 4 is a cross-sectional plan view showing a state in which the upper part is cut horizontally. In this modified example, the left and right vertical side surfaces 11c and 11d are formed by closely arranging vertically oriented cylindrical members 13a having a length substantially covering the entire height. According to this, the vertical side 1
1c and 11d can be relatively easily formed only by the cylindrical member 13a, the structure becomes simple as a whole, and the rigidity of the entire surface becomes large.

FIGS. 5 and 6 show a second modification. FIG. 5 is a perspective view of the entire unit 5, and FIG. 6 is a cross-sectional plan view showing a state in which the upper part is cut horizontally. .
In this modified example, among the cylindrical members 13a having the left and right vertical side surfaces 11c and 11d, those at both ends in the horizontal direction have a square cross section, and those at the inner side have a circular cross section. Also according to this, the utility according to the above-described modified example can be obtained.

Then, the cylindrical members 13a of these modified examples,
Concrete is filled also in 13b and 13c as needed according to the above.

In the above embodiment, the cylindrical member is filled with concrete, but instead of this concrete, a powder-like damping material (eg, sand) or a jelly-like damping material (eg, grease or tar) is filled. You can do it.

[0032]

According to the present invention constructed as described above, concrete is filled in the cylindrical member, so that even in the case of a large machine tool or the like, a construction for forming an enclosure for concrete pouring, etc. It is possible to easily fill concrete at a convenient time without the need for a concrete, and to obtain an effective vibration damping action with a small amount of concrete.

According to the second aspect of the present invention, since concrete is hermetically sealed inside the tubular member, shrinkage and deterioration due to aging of the concrete are prevented. No noise or distortion is generated, and the mechanical accuracy is maintained well over a long period of time.

According to the third aspect, the powder-like damping material or the jelly-like damping material acts according to concrete, and the same effects as described above can be obtained. In addition, since this kind of vibration damping material has fluidity forever, it can be easily taken out as needed, thereby simplifying repair and the like.

[Brief description of the drawings]

FIG. 1 is a view showing a frame structure of a machine tool as a vibration damping structure according to the present invention.

FIG. 2 is a cross-sectional plan view in which the upper part of the box-shaped structure of FIG. 1 is cut horizontally.

FIG. 3 is a perspective view showing a first modified example of the box-shaped structure.

FIG. 4 is a plan sectional view of the box-shaped structure of FIG.

FIG. 5 is a perspective view showing a second modification of the box-shaped structure.

FIG. 6 is a cross-sectional plan view of an upper portion of the box-shaped structure of FIG. 5 cut horizontally.

[Explanation of symbols]

 1, 3, 5 Structure 6a, 6b Tubular member 9a, 9b Tubular member 13a, 13b, 13c Tubular member

Claims (3)

[Claims] 1. A vibration-damping structure for a machine tool or the like, wherein a required bone member of the structure is a cylindrical member, and concrete is filled and solidified inside the cylindrical member. 2. The vibration damping structure of a machine tool or the like according to claim 1, wherein the concrete is hermetically sealed inside the cylindrical member. 3. A required bone member of the structure is formed as a cylindrical member, and a powder-shaped damping material or a jelly-shaped damping material is hermetically sealed inside the cylindrical member. Suppression type structures such as machine tools.