JP4749535B2 - Machine Tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a machine tool such as a grinding machine provided with a bellows so that chips do not adhere to a guide rail.
[0002]
[Prior art]
A general grinder includes a table that reciprocates along a guide rail laid on a base. The workpiece is fixed on the table, and the workpiece is ground by a rotating grinding wheel while moving the table.
[0003]
Here, when the workpiece is ground, chips, grindstone scraps and the like are generated and scattered. If the chips, grindstone dust or dust adhere to the guide rail, the chips may hinder smooth reciprocation of the table, and may also deteriorate the accuracy of grinding. Therefore, a telescopic bellows was attached between the both ends of the reciprocating table and the base so as to cover the periphery of the guide rail, and adhesion of chips and the like to the guide rail was prevented by the bellows. .
[0004]
[Problems to be solved by the invention]
In a machine tool such as a conventional grinder, the bellows expands and contracts, so that it looks like a bellows, the pressure inside the bellows on the extending side decreases, and air flows from the outside through the gap. If dust or fine chips are entrained in the air flowing into the bellows from the outside, they adhere to the guide rail, and the above problem cannot be solved despite having the bellows.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a machine tool capable of preventing dust or chips from entering the bellows.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 is a work support table mounted on a guide rail laid on a base and capable of reciprocating along the guide rail, and the table. A tool for processing the workpiece placed thereon, arranged on both sides in the moving direction of the table, and one end fixed to the end of the table and the other end fixed to the base, In a machine tool including first and second bellows that protect the guide rail in a sealed state while expanding and contracting following the reciprocation of the table, the first space in the first bellows and the first bellows The gist is that an air flow passage connecting the second space in the second bellows is provided , and the air flow passage is formed in the base .
[0009]
According to a second aspect of the invention, in a machine tool according to claim 1, wherein the tool is summarized in that a rotating abrasive stone.
As described above, according to the first aspect of the present invention, the table is reciprocated to process the workpiece. As the table reciprocates, the air pressure in either the first space formed by the first bellows or the second space formed by the second bellows increases and the other air pressure decreases. try to. Since the air flow passage allows air to flow from the space where the atmospheric pressure increases to the space where the atmospheric pressure is about to decrease, the air pressure in both spaces is always uniformed, and the inflow of air from the outside into the bellows can be reduced. Accordingly, it is possible to suppress the penetration of chips, grindstone scraps, etc. into the space.
[0010]
According to invention of Claim 2 , since a tool is a rotary grindstone which produces | generates fine chips and grindstone waste, it is effective.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a machine tool embodying the present invention will be described with reference to FIGS.
[0012]
The machine tool shown in FIGS. 1A and 1B is a grinding machine, and includes a base 12 mounted horizontally on a base frame 11. Two guide rails 13 are laid in parallel on the base 12. A table 14 is placed on the guide rail 12. A support tool 15 is placed on the table 14, and the work 16 is supported by the support tool 15. A grinding wheel 17 serving as a rotary grinding wheel is attached above the workpiece 16.
[0013]
This machine tool has a table moving mechanism (not shown). The table moving mechanism reciprocates the table 14 along the guide rail 13. A workpiece 16 that reciprocates with the table 14 is ground by a grinding wheel 17.
[0014]
One end of the first bellows 18 is attached to one end of the table 14. The bellows 18 protects the guide rail 13 exposed from the end of the table 14 from chips. The other end of the bellows 18 is attached to the base 12, and the bellows 18 together with the surface of the base 12 is a guide rail. 13 is surrounded and protected. One end of a second bellows 19 is attached to the other end of the table 14. The other end of the bellows 19 is attached to the base 12, and the bellows 19 surrounds and protects the guide rail 13 together with the surface of the base 12. The first and second sealed spaces 21 and 22 are formed in the bellows 18 and 19.
[0015]
In this machine tool, a hole 20 serving as an air flow passage is formed in the base 12. Through the hole 20, the first space 21 and the second space 22 communicate with each other.
Next, the operation of this machine tool will be described.
[0016]
A table moving means (not shown) reciprocates the table 14 along the guide rail 13. Along with this movement, the workpiece 16 also reciprocates. The rotating grinding wheel 17 moves relative to the workpiece 16 and grinds the surface of the warper 16.
[0017]
The bellows 18 and 19 expand and contract following the reciprocating movement of the table 14, cover the upper part of the guide rail 13 exposed from both ends of the table 14, and prevent chips scattered by grinding from adhering to the guide rail 13. To do.
[0018]
When the table 14 reciprocates, the air pressure of either the space 21 on the bellows 18 side or the space 22 on the bellows 19 side rises and the other air pressure tends to drop. The hole 20 circulates air from the space 21 or 22 side where the atmospheric pressure starts to rise to the space 22 or 21 side where the atmospheric pressure starts to drop. Therefore, the air pressure in the spaces 21 and 22 is equalized, and air containing dust and chips is prevented from entering the bellows 18 and 19 from the outside.
[0019]
As described above, according to the machine tool of the above embodiment, the following features can be obtained.
-Since the holes 20 communicating with the spaces 21 and 22 are provided, the air pressure in the spaces 21 and 22 can be made uniform, and even if the table 14 reciprocates, dust and chips are prevented from entering the bellows 18 and 19. Thus, the moving operation of the table 14 can be maintained smoothly, and the precision in grinding can be kept good.
[0020]
-Since the hole 20 as an air flow path is formed in the base 12, it is not necessary to prepare another air flow path, and workability is not deteriorated.
In addition, you may change the said embodiment as follows.
[0021]
In the above embodiment, the grinding machine using the grinding wheel 17 has been described, but the present invention can also be applied to other machine tools such as a cutting machine .
[0023]
【The invention's effect】
As described above, since the air flow passage communicating with the first space on the first bellows side and the second space on the second bellows side is provided, the air flow passage rises in atmospheric pressure. Air flows from the space to the space where the pressure is going to drop, and the air pressure in both spaces is made uniform. For this reason, it is possible to prevent dust and chips from entering the bellows, and it is possible to keep the table moving operation smoothly and to maintain good accuracy in processing.
[Brief description of the drawings]
FIGS. 1A and 1B are a front view of a main part of a machine tool showing an embodiment of the present invention and a side view of a main part with a part cut away .
[Explanation of symbols]
12 ... Base, 13 ... Guide rail, 14 ... Table, 16 ... Workpiece, 17 ...
Grinding wheels as tools and rotary wheels , 18, 19 ... bellows, 20 ... holes as air flow passages, 21, 22 ... first and second spaces.

Claims (2)

A work support table mounted on a guide rail laid on a base and capable of reciprocating along the guide rail;
A tool for processing a workpiece placed on the table;
The guide rails are arranged on both sides of the table in the moving direction, and one end is fixed to the end of the table and the other end is fixed to the base. The guide rail expands and contracts following the reciprocating movement of the table. In a machine tool comprising first and second bellows for protecting in a sealed state,
The air flow passage connecting between said first second space between the first space in the bellows in the second bellows is provided, the air flow path, and characterized by forming on the base Machine tool to do. The machine tool according to claim 1, wherein the tool is a rotating grindstone.

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