JPH0230202Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention isolates the tools stored in the magazine of an automatic tool changer from the main shaft side of the machining area to prevent chips and the like from adhering to the tools. The present invention relates to a machine tool cover suitable for preventing the above.

[Conventional technology]

Generally, the magazine that stores the tools of an automatic tool changer is placed on the side or top side of the machine body, and is separated from the main spindle by a fixed cover to prevent chips, coolant, etc. from adhering to the tools during machining. It is prevented.

To change tools with an automatic tool changer,
After positioning the spindle and magazine at a predetermined position for tool exchange, grip the desired tool in the magazine with the exchange arm, pull it out of the magazine, rotate it 180 degrees, and insert the tool into the spindle. This is done by Therefore, it is necessary to open the fixed cover (door) before grasping the tool in the magazine.

[Problem that the invention attempts to solve]

The work time for opening and closing the fixed door is idle time outside of the machine's actual operating hours, as is the time for changing tools, and reduces the operating rate. This has become one of the impediments to shortening machining time to achieve high productivity and efficiency. Further, some kind of power is required to open and close the fixed door, and a device for this purpose is required.

The present invention has been developed in view of the above circumstances, and its purpose is to create a construction in which the time required to open and close the door can be ignored and no special device is required for opening and closing the door. Our goal is to provide mechanical covers.

[Means for solving problems]

In order to achieve the above object, the present invention fixes one end to the changing arm of an automatic tool changer, and extends the other end along the direction of movement of the change arm of the automatic tool changer. A movable cover formed to block the movable cover is provided, and one end side of the swinging cover whose other end side is pivoted to the fixed side is pressed into contact with the other end side of the movable cover via a biasing means. The machine tool cover is also provided with a fixed cover that surrounds the movable cover and the swinging cover and is disposed with the side on which the magazine and exchange arm move open.

[Effect]

When exchanging tools, the exchange arm that grips and moves the tool rotates the swinging cover in its opening direction, releases the interruption between the magazine side and the spindle side, and rotates the exchange arm to perform tool exchange. Make it.
When tools do not need to be replaced, the main shaft side and the magazine side are isolated by the movable cover, swinging cover, and fixed cover. As described above, the present invention saves the time equivalent to conventional door opening and closing by opening and closing the cover at the same time as the tool exchange operation, and also eliminates the need for a drive source for opening and closing.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, a column is supported on the bed 1 so as to be slidable in the Z direction, and a headstock 3 is supported on the column 2 so as to be slidable in the Y direction.

Additionally, as shown in Figure 1, an automatic tool changer (hereinafter referred to as ATC) is placed on top of column 2, and a magazine 4 is placed on top of column 2.
It is placed tilted backwards. A plurality of tools 5 are stored in the magazine 4. An ATC exchange arm 6 is arranged near the magazine 4. The exchange arm 6 has a rotatable arm portion, is movably and rotatably supported in the Z direction, and has a claw portion 6a (shown in FIG. 2) for gripping the tool 5.
is formed. When replacing the tool 5, the tool 5 in the magazine 4 is lowered to position A in FIG. After gripping the tool 5, the exchange arm 6 moves in the Z direction, pulls out the tool 5 from the magazine 4, and
The tool 5 is inserted and held in the main shaft 3a of the headstock 3 which rotates 180 degrees and is positioned at a fixed position.

On the tip side of the exchange arm 6, there is a Z mark indicating the direction of movement of the exchange arm 6.
One end side of the movable cover 7 formed to extend along the direction is fixed with a screw 8. Also, there is a Z on the other end.
An abutment plate 7a is provided perpendicular to the direction. On the top surface 11a of the fixed cover that covers the entire machine tool,
A rectangular opening 13 corresponding to the movement range of the ATC is provided. Width of the opening 13 (X direction)
is equivalent to the width dimension of the movable cover 7.
Width dimension of moving cover 7 (dimension in the X direction in the figure)
is formed to have a size that prevents the tool 5 and the like held by the exchange arm 6 from coming into contact with both sides of the width of the opening 13, which will be described later, at least when the exchange arm 6 rotates.

As shown in FIG. 3, one end of the swinging cover 9 abuts against the abutment plate 7a on the other end of the movable cover 7. Specifically, the contact plate 7a contacts and engages the outer periphery of the roller 10 fixed to the center of one end of the swing cover 9. The other end of the swinging cover 9 is pivotally supported by a pin 12 on the upper surface 11a of the fixed cover of the machine. Further, the width dimension of the swinging cover 9 is formed to be the same as that of the movable cover 7.

Side plates 13a are provided on both side surfaces of the movable cover 7 and the swinging cover 9 (in the direction perpendicular to the paper plane of FIG. 1, that is, in the X direction), integrally with the fixed cover upper surface 11a.

The movable cover 7, the swinging cover 9 and the fixed cover 11 are all formed from flat plates of appropriate thickness,
The material is not particularly limited, such as iron or plastic, but it is desirable that it has appropriate strength, heat resistance, and oil resistance.

As shown in FIGS. 1 and 3, the swinging cover 9
A spring 14, which is the biasing means described above, is stretched on both sides between the side plate 13a and biases the roller 10 of the swing cover 9 in a direction to press against the contact plate 7a.

Next, the operation of this embodiment will be explained.

During machining, etc. in which the tool 5 is not replaced, the exchange arm 6 is stored in the position shown in FIG.
It is blocked by the swinging cover 9, the fixed cover 11, and the opening side plate 13a, so that chips, coolant, etc. during machining do not adhere to the magazine 4 side. Note that a means (not shown) is provided to prevent chips, coolant, etc. from scattering toward the magazine 4 from the opening on the exchange arm 6 side.

At the time of tool exchange, the main shaft 3a moves to the regular position as described above, and the exchange tool 5a in the magazine 4 swings down to the A position, and the exchange arm 6 grips a predetermined exchange tool 5a. In this state, the exchange arm 6 moves forward in the Z direction and pulls out the exchange tool 5a from the magazine 4. This forward movement of the exchange arm 6 pushes the swinging cover 9 toward the open side by the contact plate 7a against the biasing force of the spring 14. This opens the lower side of the exchange arm 6 to the main shaft 3a side, so that by rotating the exchange arm 6, the tool 5 can be inserted into the main shaft 3a side without interfering with the swing cover.

Furthermore, when the replacement arm 6 is restored, the swinging cover 9 is automatically closed by the biasing force of the spring 14.

As mentioned above, since the separation between the main shaft 3a side and the magazine 4 side is opened by the inevitable movement of the exchange arm 6, it takes time to open the fixed cover (door) each time as in the prior art. This will no longer be necessary, and the time will definitely be reduced. Furthermore, as described above, since the opening is performed by the inevitable movement of the exchange arm 6, a special opening device is not required, and the device can be simplified.

In addition, the movable cover 7 and the swinging cover 9 are supported by springs 14.
Since it is constantly pressed, the spindle 3a side and the magazine 4 side are reliably shielded when the tool is not replaced.

[Effect of idea]

As is clear from the above explanation, according to the present invention, the opening and closing of the cover, which corresponds to the conventional opening and closing of the door when changing tools, operates simultaneously with the inevitable operation when changing tools, so the cover is The opening/closing time is ignored, the operating rate is improved, and there is no need for a special device for opening/closing, simplifying the structure and eliminating the need for a drive source for opening/closing the cover, resulting in cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a front view taken in the direction of the arrow in FIG. 1, and FIG. 3 is a perspective view of the used part of the embodiment. 1...Bed, 2...Column, 3...Spindle,
4... Magazine, 5... Tool, 6... Exchange arm, 7... Moving cover, 7a... Contact plate, 8...
Screw, 9...Swinging cover, 10...Roller, 11
...Fixed cover, 11a...Top surface of fixed cover, 1
2... Pin, 13... Opening, 13a... Side plate,
14...Spring.

Claims (1)

[Scope of utility model registration request] In machine tool covers that shield the tools in the tool magazine from chips, coolant, etc. during machining,
A movable cover whose one end side is fixed to an exchange arm of an automatic tool changer and whose other end side is extended along the direction of movement thereof and is disposed to isolate the main shaft side from the magazine side; a swinging cover that abuts and has its other end pivotally supported on a fixed side; a fixed cover that surrounds the movable cover and the swinging cover and is disposed with the movable side of the magazine and exchange arm open; A cover for a machine tool, characterized in that it is provided with a biasing means for biasing the swinging cover toward a side that constantly presses the movable cover.