JPS63196350A - Machine tool table cover - Google Patents

Abstract

PURPOSE:To completely seal up chips which scatter within a cover and prevent outward scattering by bringing an opening part which surrounds the periphery of a table of a cover into contact with a sliding plate at all times while also forming the part between said sliding plate and an inside plate in such a way that their peripheries are always brought into close contact with each other at the time of the occurrence of a relative movement. CONSTITUTION:A sliding plate 7 is brought into contact in a face-form with the tip of the bottom face 4a of a cover 4 while being relatively movably placed, forming a sealing part against dust-like chips which is produced at the time of machining a workpiece on the contacting face between the bottom face 4a and the sliding plate 7. The sliding plate 7 has a square hole 8 nearly in its center part in order that the movement of a table 2 may not be hindered at the time of the relative movement of the table 2, and guide frames 9 are provided on the inner peripheral sides of the the square hole. And, the guide frames 9 are engaged and guided by the guide grooves 10 of the table 2 in at least one direction out of the perpendicularly intersecting two moving direction of the table 2, enabling the relative movement between the table 2 and the guide frames 9 in at least one direction. Also, an inside plate 11 which is fixed to the table 2 is closely brought into contact in a face-form with the top of the sliding plate 7 while being relatively slidably placed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hermetic cover device for a movable table portion of a machine tool.

It is known that a guard is provided in a deformation machine tool to prevent chips from scattering.

In the case of metal cutting, the chips are large, so if there is a guard of the necessary height, it can be prevented from scattering outside the machine tool, and the generated chips can be easily collected by cleaning if they are prevented from scattering. can.

Recently, machine tools have been increasingly used for graphite processing and plaster processing. In the case of such work materials, chips are generated as very fine powder, which scatter around the machine tool and become suspended in the air, causing a pollution problem. Furthermore, the fine chips also enter and adhere to the sliding surface between the fixed machine frame and the movable table, causing wear on the sliding surface.

In conventional machine tools, it is possible to prevent the scattering of chips by isolating the machine tool and its surroundings, but it has not been considered to seal and isolate the space between the movable table and the fixed position frame. Therefore, it was not possible to prevent powder chips from entering the sliding surface between the table and the frame.

Since the movable table moves not only relative to the frame that supports the table but also relative to the spindle that supports the tool, there is a problem in that it is not easy to seal and isolate the space between the movable table and the frame. .

The present invention solves this problem and provides a machine tool table cover that not only prevents scattering to the outside but also seals and blocks the space between the relative sliding part between the table frame and the workpiece mounting part of the table. It is intended to.

. The present invention solves the above problems by providing a cover fixed to a machine frame, an inner plate fixed to a table, and a sliding member arranged so as to be in surface contact with the inner plate and the cover at the same time. The cover is formed as a frame that surrounds the movable range of the table and the workpiece fixed on the table, and can be attached in a sealed manner to a fixed position part of a head that supports a tool of a machine tool. and has a table opening formed so as not to come into contact with the moving table, and the sliding plate has a square hole inside, and the square hole is formed in two perpendicular movement directions of the table. At least one side has a length that allows free relative movement within the movement range of the table, and the inner periphery of the square hole is slidably guided in a guide groove formed in the table at least in the relative movement direction. This was achieved by fixing the engaged guide frame.

■ The slider is in surface contact with the frame fixed by the present invention so that it can move relatively in any direction in the movement direction of the table, and within the range of relative movement, the four circumferences are always in close contact with each other, and the slider is in surface contact with the frame fixed by the present invention. The inner plate fixed to the table is in surface contact so that it can move relative to the table, and within the range of relative movement, the four circumferences are always in close contact, and the guide frame fixed to the inner periphery of the sliding plate is in the guide groove provided on the table. When the table moves, relative sliding between the guide frame and the guide groove causes sliding between the inner plate and the slider, and the sliding plate and cover When the table moves in other directions, the guide frame moves with the table without any relative movement, so there is no relative movement between the inner plate and the sliding plate, and the sliding Sliding occurs between the plate and the cover.

Even when the movements in both directions are combined, the opening in the cover surrounding the table is always in close contact with the sliding plate, and chips are prevented from entering through the opening in the cover towards the machine frame. Furthermore, even if relative movement occurs between the sliding plate and the internal plate, the four peripheries are always in close contact with each other, so that chips are prevented from entering the square holes of the sliding plate. Chips scattered inside the cover are completely sealed and prevented from scattering outside.

1 ship± The details of the present invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 and 2, a table 2 is supported on a machine tool frame 1 so as to be slidable in two orthogonal coordinate axes within a horizontal plane, for example. A head 3 for supporting a tool is provided on the frame 1 so as to be movable up and down.

Machining of a work fixed on the table 2 with a tool is performed by moving the table in two axial directions and moving the head 3 up and down.

A cover 4 is fixed to the frame 1. An opening/closing lid 5 is attached to the cover 4 in a sealable manner for working on the workpiece on the table 2. It is convenient for the opening/closing lid 5 to be made of a transparent material in order to monitor the inside.

In FIGS. 3 and 4, the cover 4 is formed as a frame that surrounds the entire range in which the table 2 and a work (not shown) fixed on the table 2 move. Therefore, the table 2 and the workpiece are movable only within the range surrounded by the fixed cover 4. Bottom surface 4 of cover 4
An opening 6 large enough to prevent the moving table from coming into contact with the opening 6 is formed in a. The table 2 passes through the opening 6 from below and enters the space inside the cover 4.

A sliding plate 7 is in planar contact with the bottom surface 4a of the cover 4,
Allows relative sliding! 3! It is placed.

The contact surface between the cover bottom surface 4a and the sliding plate 7 is configured to form a seal against powder chips generated during processing of the workpiece. The sliding plate 7 has a square hole 8 approximately in the center so as not to hinder the movement of the table 2 when the table 2 moves relative to each other. A guide frame 9 is provided around the inner periphery of the square hole. The guide frame 9 is guided by a guide groove 10 formed in the table 2 in at least one of the two orthogonal directions of movement of the table 2, and the table 2 and the guide frame 9 are aligned in at least one direction. is relatively movable.

An internal plate 11 fixed to the table 2 is placed on the sliding plate 7 so as to be in close contact with each other in a planar manner and to be able to slide relative to each other.

The internal plate 11 is formed to have a size sufficient to cover the square hole 8 of the sliding plate 7 even when the table 2 slides relative to the sliding plate 7 as the table 2 moves. The contact area between the sliding plate 7 and the inner plate 11 is designed to form a seal that prevents powder chips from entering the square hole 8.

For example, the guide frame 9 is fixed to the sliding plate 7 as shown in FIG. 5, and forms the inner periphery of the square hole 8.

In this example, when the table 2 moves in the X direction, the guide frame 9, that is, the sliding plate 7, does not move due to the relative movement between the guide frame 9 and the guide groove 10. Therefore, no relative movement occurs between the sliding plate 7 and the cover bottom surface 4a, but a relative movement occurs between the inner plate 11 and the sliding plate 7 in the X direction. When the table moves in the Y direction, the guide frame 9 is moved together with the table 2,
No relative movement occurs between it and table 2. Therefore, the sliding plate 7 causes relative sliding movement in the Y direction with the cover bottom surface 4a, but does not cause relative movement with the inner plate 11.

As another example, as shown in FIG. 6, the guide frame 9 is guided by the guide groove 10 of the table 2 in one direction, e.g. ) has a guide groove 1 provided on the inner peripheral surface of the sliding plate 7.
2 and is slidably guided. In this example, table 2 is
When the guide frame 9 and the guide groove 10 move in the direction, the guide frame 9, that is, the sliding plate 7 does not move due to the relative sliding between the guide frame 9 and the guide groove 10. Therefore, there is no relative movement between the sliding plate 7 and the cover bottom surface 4a, and the table 2 A relative movement occurs between the moving internal plate 11 and the sliding plate 7 in the X direction. When the table 2 moves in the Y direction, the guide frame 9 moves together with the table 2, causing relative movement in the Y direction between the guide groove 12 of the sliding plate 7 and the guide frame 9. Therefore, the sliding plate 7 does not need to move. Although the sliding plate 7 causes relative movement in the Y direction with the inner plate 11, it does not cause relative movement with the cover bottom surface 4a. In the example shown in FIG. 6, it is also possible to fix the cover bottom surface 4a and the sliding plate 7 together.

It is necessary to provide an opening 13 on the top surface of the cover 4 through which the head 3 to which the tool is attached can enter and exit. Although this opening 13 may be provided with a sealing means to prevent powder from scattering, the structure becomes complicated when considering the state in which the head 3 is completely removed upward. In this case, the opening 13 is left open and the outer cover 14 covering the entire cover 4 is placed in the first position.
It can also be formed as shown in the figure.

It is advantageous in terms of removing chips if the cover 4 is provided with a suction port 15 and a suction pipe 16 attached to the suction port allows suction by a vacuum cleaner or the like.

1) According to the present invention, even if the chips are in the form of powder, they can be collected in the cover surrounding the table, and even though there is relative movement between the table and the cover, there is no need for sliding parts on the table frame, etc. It was possible to prevent chips from entering the outside of the cover.

With the structure according to the present invention, the direction of relative movement of the sliding plate is properly regulated, so that it does not tilt during movement, and it has become possible to set the size necessary to cover the opening to the minimum.

[Brief explanation of the drawing]

Fig. 1 is a front view of a machine tool equipped with a cover according to the present invention, Fig. 2 is a left side view, Fig. 3 is an enlarged front sectional view of a part of the table cover, and Fig. 4 is a right side view of Fig. 3. A cross-sectional view, FIG. 5 is a schematic view of the joint between the cover and the table seen from below, and FIG. 6 is a modification of FIG. 5. 1... Frame 2... Table 4... Cover 4a... Cover bottom 6... Opening
7...Sliding plate 8...Square hole 9...Guide frame 10...Guide groove 11...Inner plate Fig. 2

Claims (1)

[Claims] (1) In a machine tool table cover that prevents chips from scattering to the outside, the cover is fixed to the machine frame;
comprising an internal plate fixed to the table, and a sliding plate arranged so as to be in surface contact with the internal plate and the cover at the same time,
The cover is formed as a frame that grips the movable range of the table and the workpiece fixed on the table, and is formed so as to be able to be attached in a sealed manner to a fixed position part of a head that supports a tool of a machine tool, and is movable. The sliding plate has a table opening formed so as not to come into contact with the table, and the sliding plate has a square hole therein, and the square hole is used for movement of the table in at least one of two orthogonal movement directions of the table. A guide frame is fixed to the inner periphery of the square hole, having a length that is freely movable relative to each other within the range, and is slidably guided and engaged with the guide groove of the table at least in the relative movable direction. A machine tool table cover characterized by: