JPS6334830Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention automatically attaches various types of cleaning tools having dust suction and blowing functions to the main shaft as appropriate.
This invention relates to a chip cleaning device for machine tools such as machining centers that reliably removes chips.

[Conventional technology]

In machine tools such as machining centers equipped with numerical control devices, desired cutting tools are automatically exchanged between a tool magazine that stores many types of tools and a spindle, and multi-step machining is automatically performed.

In the prior art, as means for removing chips generated during machining, there are methods that blow out air from an air blowing means installed near the main shaft, and methods that blow out cutting oil and cause the chips to flow out along with it. Also, chips were removed by the operator at appropriate intervals. However, in cases where the machined shape is complex, deep holes, narrow holes, fine threads, blind holes, etc., the above-mentioned means often do not remove chips sufficiently. Incomplete removal of chips may cause machining defects, cause deterioration of machine precision due to dust, and increase the likelihood of machine stoppage, machine failure, damage, etc. Therefore, measures to remove chips are extremely important, especially in response to unmanned systems such as FMS, and in terms of improving machine operating rates.

Therefore, in order to solve this problem, we have already started
The following invention is disclosed in Publication No. 53-40990.
In other words, several types of cleaning tools are stored in a tool magazine in the same way as regular machining tools for machine tools, and after the final machining is completed, they are crowned on the spindle by ATC, attached to the lower side of the spindle head, and equipped with a dust suction device. The tip of the connecting device is moved to engage the suction port drilled on the outer periphery of the grip of the cleaning tool, and communicated with the through-hole of the cleaning tool to suction chips. It was hot.

[Problem that the invention attempts to solve]

However, the invention disclosed in Japanese Patent Publication No. 53-40990 only sucks the chips, so there was a risk that the cleaning of the chips would be insufficient.

The present invention was developed in view of the above circumstances, and its purpose is to create a simple machine tool that can sufficiently remove chips, improve quality, support unmanned operation, and improve machine operation rate. An object of the present invention is to provide a chip cleaning device.

[Means for solving the problem and their effects]

In order to solve the above problems, in the present invention, a machine tool having a numerical control device has a main shaft that can be moved to a cleaning position, a tool magazine that can store and index many types of cleaning tools,
It has a socket part that is provided integrally with the main shaft and into which the cleaning tool is inserted, and the tool magazine is held at an indexed predetermined position of the tool magazine, and the socket part is inserted into the main shaft. an automatic exchange means that is rotatable as much as possible; a blow-off means provided on the automatic exchange means and having a fluid passage communicating with a blow-off portion provided on a cleaning tool for blowing off chips; and a suction means having a fluid passage communicating with a suction section provided on the cleaning tool to suction scattered chips, and the cleaning tool is moved to a cleaning position to clean the chips. It is characterized by

By adopting the above configuration, air suction,
The blowing process reliably removes chips, improves quality, and allows for unmanned operation.
Moreover, the operating rate of the machine can be improved.

〔Example〕

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

FIG. 1 shows a machine tool (column type machining center) having a numerical control device embodying this embodiment.

The main shaft 1 is rotatably supported by the saddle 2 and is shown at Z in the figure.
It moves up and down along with the saddle 2 in the axial direction. Further, the saddle 2 moves along the cross beam 3 in the Y direction.
The workpiece W is mounted on the table 5 and is oriented in the X direction (Y,
(direction perpendicular to the Z direction). Cutting tools stored in a cutting tool magazine (not shown) are appropriately inserted into the main spindle 1, and machining is performed based on predetermined programming.

The automatic exchange means 6 of the chip cleaning device is attached to the side of the saddle 2. The pipe 7 of this means is connected to a separate dust suction means 11. Piping 9 is connected to blowing means 10. Further, the tool magazine 8 of the above device is arranged on the side of the column 4 of the machine.

The automatic exchange means 6 will be explained with reference to FIG.

The cylinder 601 is fixed to the side surface of the saddle 2 and communicates with a drive source (not shown). piston 602
slides up and down in the figure in the cylinder 601 by the drive source, and a through hole 603 communicating with the pipe 7 is formed inside the cylinder 601 . A block 60 is provided at the lower end of the piston 602 protruding from the cylinder 601.
4 are connected to each other, and a support fitting 605 is further fixed to the block 604. One end of a guide rod 606 parallel to the cylinder 601 is fastened to the block 604, and the other end is connected to an upper piston rod 60 of a piston 602 projecting from the cylinder 601, as shown in FIG. Further, the guide rod 606 is connected to the cylinder 601 via a bush 607.
is slidably supported. With the above configuration, the piston 602 and the support fitting 605 are connected to the guide rod 606.
It moves up and down inside the cylinder 601 while being guided by the pipe 7.
moves to follow this.

A motor 608 is fixed to the side surface of the support fitting 605, and a gear 609 is pivotally attached to the center of the support fitting 605. A piniton 610 connected to the motor 608 meshes with the gear 609 .

The gear 609 and the piston 602 are on the same axis, and a through hole 600 coaxial with the through hole 603 is formed in the center of the gear 609. A coupling member 598 in which a hole 599 having an L-shaped cross section is formed is fixed to the lower end surface of the gear 609 , and one end of the hole 599 communicates with the through hole 600 . A hollow rotary pipe 611 is inserted into the other end of the hole 599 in a direction perpendicular to the main shaft 1, and a cap 6 to which the cleaning tool 12 is attached is attached to the tip of the rotary pipe 611.
12 is fixed. A hole 613 in the axial direction of the main shaft 1 is formed in the cap 612 and opens downward, and the hole 613 is provided with a stopper 614 that engages with the cleaning tool 12. Further, the head of the cap 612 is formed into a tapered shape so that it can be attached to the main shaft 1. Through hole 6 of piston 602
03 is a through hole 600, a hole 599, a rotating pipe 61
1 and a hole 613 of the cap 612. The cap 612 has a nozzle holder body 615.
is fixed, and a nozzle holder 616 having an axial through hole 620 is held slidably in the axial direction of the main shaft 1 . A spring 621 is interposed between the nozzle holder main body 615 and the nozzle holder 616.

Further, a flexible pipe 9 is connected to the nozzle holder body 615 and communicates with the through hole 620 of the nozzle holder 616. In addition, the pipe 9 is a stopper 6.
17 to the rotating pipe 611, and extends upwardly along the piston 602 as schematically shown in FIG. Piping 7 and 9
As shown in FIG. 1, the piston 602 is arranged in a largely curved manner so as to smoothly follow the vertical movement of the piston 602.

With the above configuration, the cap 612 is connected to the piston 60.
It is rotated by a motor 608 around the movement axis No. 2, and also moves up and down following the up and down movement of the piston 602.

Next, the tool magazine 8 will be explained with reference to FIGS. 3 and 4.

Bracket 801 fixed to column 4 of the machine
has a rotation axis 6 parallel to the central axis of the cap 612.
A motor 802 (such as a servo motor) having a rotation axis 622 of the motor 802 is fixed.
An index disk 803 is connected to the . As clearly shown in FIG. 4, the index disk 803 has substantially semicircular grooves 804 equally spaced along its outer circumference in which a large number (eight in the figure) of cleaning tools 12 are accommodated. A claw portion 805 corresponding to the shape of the grip portion 1201 of the cleaning tool 12 is formed in the groove portion 804, and
A regulating fitting 806 that fits into the position regulating groove of the grip portion 1201 is provided. Further, a pair of springs 807 each having a shape that engages with the outer periphery of the gripping portion 1201 is provided. The cleaning tool 12 has a disc 8 in the groove 804.
03, the gripping part 1201 is locked to the claw part 805, and is positioned by the regulating metal fitting 806 and held by a pair of springs 807.

As shown in FIG. 3, the cleaning tool 12 has a grip portion 1201 as described above and a cap 61 that protrudes upward.
a protrusion 1202 inserted into the hole 613 of No. 2;
A hollow cylindrical portion 1203 whose one end side is connected to the gripping portion 1201 and whose other end side is open, and the cylindrical portion 12
Suction part 1204 formed in the opening part of 03
The pipe 1 is housed in the cylindrical part 1203 and arranged with its open end facing the suction part 1204.
206 and a nozzle 1205 that is fixed to the outer periphery of the cylindrical portion 1203 and has one end connected to the pipe 1206. Projection part 1202 and grip part 12
01 is formed with a continuous through hole, and this through hole communicates with the inside of the cylindrical portion 1203. Also, the protrusion 120
2 has a groove 1207 on the outer periphery in which the stopper 614 is engaged.
is formed. The other end of the nozzle 1205 is the cylindrical part 1
203 and extends in the axial direction of the gripping portion 1201.
It is located at a predetermined angle on the outer periphery of.

With the above configuration, the cleaning tool 12 stored in the indexing disk 803 is indexed and positioned by the rotation of the motor 802, and the cap 612, which has been moved to a predetermined indexed position, is crowned and latched to the protrusion 1202. and hold this. At the same time, the other end of the nozzle 1205 is engaged with the nozzle holder 616. Therefore, the inside of the cylindrical portion 1203 and the pipe 7 are connected to the rotating pipe 61.
1 , and the blowout pipe 1206 and piping 9 also communicate through the nozzle holder 616 .

After the cleaning tool 12 is mounted on the cap 612 as described above, it is easily taken out from the index disk 803 by pulling it in the axial direction of the rotary pipe 611 by the movement of the saddle 2 against a pair of springs 807. be able to. On the other hand, used cleaning tools 1
After inserting the cap 612 into the empty groove 804 of the index disk 803, the cap 612 is pulled upward by the piston 602 to release the lock and store it in the index disk 803.

FIG. 5 shows various cleaning tools 12. Gripping part 1201, protruding part 1202 and nozzle 1205
The shapes are almost the same. The one shown in FIGS. 5a and 5b is for a tap pilot hole, and a rubber cap 1208 is fitted into the suction part 1204. The rubber cap 1208 prevents fine chips from scattering. Figures 5c and 5e are for surface cleaning, in which a brush 1209 is provided in the suction part 1204, and the main shaft 1
The cleaning is performed by moving the brush 1209 along the surface of the workpiece. 5d is for a deep hole, and FIG. 5f is for a T-groove. Fifth
Fig. g is for a tap pilot hole, and a suction part 1210 with a variable angle is attached.

Further, in FIG. 5h, a brush 1209 is provided which is used for cleaning the inner surface of a special recess. If the surface cleaning tool does not particularly require blowing, there is no problem even if only the suction function is operated.

Next, the operation of this embodiment will be explained.

The various cleaning tools 12 as described above are stored in the index disk 803 of the tool magazine 8. After machining is completed with the cutting tool inserted into the spindle 1 and stored from the spindle into a cutting tool magazine (not shown),
According to instructions from the control device, the desired cleaning tool 1
A second index command is issued to the motor 802, and the desired cleaning tool 12 is positioned at a predetermined index position. At the same time, saddle 2 moves in the Y and Z directions,
The automatic exchange means 6 is positioned at the predetermined index position. The protrusion 1202 of the cleaning tool 12 is inserted into the hole 613 of the cap 612 and held. Next, after moving the cap 612 in the X direction as described above and taking out the desired cleaning tool 12, the motor 608 is moved as shown by the dashed line in FIG.
The cap 612 is rotated below the main shaft 1 via the rotating shaft 610, the gear 609, and the pipe 611. Next, the piston 602 is raised to attach the cap 612 to the main shaft 1. Subsequently, the main shaft 1 is moved in the X, Y, and Z directions, and the cleaning tool 12 is brought closer to the machined hole or the like. Air from the blowing means 10 is sent to the nozzle 1205 through the piping 9, and the air is blown out from the blowing pipe 1206. At the same time, suction air is supplied to the pipe 7 and the through hole 60 by the dust suction means 11.
3. The chips are introduced into the cylindrical part 1203 through the rotating pipe 611, and the chips are sucked from the suction part 1204. The chips are sucked up while being blown up by the ejected air, and are removed reliably and cleanly.

Figure 6 shows the cleaning of the tap pilot hole. From this state, move the cleaning tool to the appropriate position in the Z direction (h
(distance) to bring the rubber cap 1208 into close contact with the surface of the work W.

In addition, as shown in FIG. 7, the rubber cap 120
8 may be formed with a large number of notches 1208a, and it has been confirmed that good cleaning can be achieved by bringing this rubber cap 1208 into close contact with the workpiece W.

The used cleaning tool 12 is moved by the cap 612 to the tool magazine 8 side by the reverse operation to the above, and is stored in the empty groove 804 of the indexing disk 803, which has been indexed and positioned according to the command from the control device. be done. Connect the cap 612 to the piston 60 as described above.
It is disengaged from the cleaning tool 12 by pulling it upwards due to the rise of the cleaning tool 2 . In addition, cap 6
The main shaft fitting portion 12 is made of a soft metal material, hard rubber, resin-based non-metal material, or the like. In this embodiment, although the blowing means 10 is provided separately, the main shaft 1
Air for cleaning the holes may be introduced into the blowout pipe 1206.

[Effect of idea]

As is clear from the above description, the present invention provides the following effects.

1. Chips are reliably removed by air suction and blowing, and their scattering is also prevented.

2. Machining quality improves because accuracy defects such as errors in workpiece setting and positioning due to the intervention of chips no longer occur.

3. The chip removal process by an operator is no longer required, and all operations are automated, making it possible to support unmanned FMS, etc.

4. Machine stoppages, breakdowns, etc. are reduced, and machine operating rates are improved.

5. Since the device is moved using the feeding mechanism of the machine body, the device has a simple structure and can be implemented at relatively low cost.

6. Since the device is mounted on the spindle, chips are prevented from entering the spindle.

7. In the present invention, the cleaning tool is attached to the main shaft through the socket, so the cleaning tool can be connected to the blowing means and the suction means with a simple structure, and the cleaning tool can be clamped to the main shaft. Operation time is fast because there is no need to unclamp.

[Brief explanation of the drawing]

Fig. 1 is a front view of a machine tool equipped with an embodiment of the present invention, Fig. 2 is an axial sectional view showing the automatic exchange means of the embodiment, and Fig. 3 is a sectional view showing the cleaning tool magazine of the embodiment. , FIG. 4 is a plan view of the cleaning tool magazine, FIGS. 5 a to h are front views of various cleaning tools, FIG. FIG. 3 is a partial perspective view showing the shape of the rubber cap. 1...Spindle, 2...Saddle, 4...Workpiece, 6
... automatic exchange means, 7, 9 ... piping, 8 ... cleaning tool magazine, 10 ... blowing means, 11 ...
Dust suction means, 12... Cleaning tool, 601... Cylinder, 602... Piston, 606... Guide rod,
608...Motor, 609...Gear, 611...
Rotating pipe, 612... Cap, 616... Nozzle holder, 802... Motor, 803... Index disk, 805... Claw portion, 807... Spring, 12
01...Gripping part, 1202...Protrusion part, 1203
... Cylinder part, 1204 ... Suction part, 1205 ... Nozzle, 1206 ... Blowout pipe, 1208 ...
Rubber cap, 1207...Brush.

Claims (1)

[Scope of utility model registration request] In a machine tool having a numerical control device, a main shaft movable to a cleaning position, a tool magazine that stores and indexes various types of cleaning tools, and a tool magazine that is provided integrally with the main shaft and into which the cleaning tools are inserted. an automatic exchange means having a socket and rotatable to hold tools in the tool magazine at a predetermined indexed position of the tool magazine and insert the socket into the main shaft; a blowing means having a fluid passage communicating with a blowing section provided on the cleaning tool for blowing off chips; and a blowing means provided on the automatic exchange means and provided on the cleaning tool for sucking flying chips. and a suction means having a fluid passage communicating with a suction section, the cleaning tool being moved to a cleaning position to clean chips.