JPH0743367U - Suction removal device for machine tools - Google Patents

Abstract

(57) [Abstract] [Purpose] A machine tool capable of continuously removing the chips generated when a cutting tool such as a drill is machined by guiding it with a guide member to a specific place by an air flow. An object of the present invention is to provide a chip suction removal device. [Structure] A cylindrical guide portion 13 for supporting a cutting tool 11 such as a drill mounted on the spindle 4 on the way to the work w and guiding it in a displaceable axial direction surrounds a circumference of a certain length of the cutting tool. Is formed in the shielded space chamber 14 which is connected to an air suction pipe 16 for sucking the air therein, and a ventilation hole 11a is formed in the shaft of the cutting tool,
One end thereof is opened to the tip of the cutting tool, and the other end is opened to the atmosphere contact surface on the main shaft side located above the shielded space chamber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chip suction / removal device for a machine tool that can remove chips generated by machining using a guide means for stabilizing the position of a cutting tool to a specific location by using a flow of air.

[0002]

[Prior art]

 There is a chip suction / removal device that immediately removes chips generated by a cutting tool in machining with a machine tool to another place immediately by the flow of air (Japanese Utility Model Publication No. 2-104915). And Japanese Utility Model Publication No. 3-117518).

This device prevents deterioration of working environment due to scattering of chips, reduces labor for cleaning chips, and prevents deterioration of processing accuracy due to distortion of the work due to heat of chips. It makes things possible.

On the other hand, in a machine tool, if the cutting tool such as a drill attached to the spindle is long, the position of the workpiece is difficult to settle at a fixed position and accurate machining cannot be performed. Therefore, as shown in FIG. Further, in order to stabilize the position of the cutting tool 11, the circumferential surface of the cutting tool can be slidably displaced in the axial direction of the cutting tool through a cylindrical guide member 13B fixed to the spindle head or the work fixing base, and can be rotationally displaced about the same axis. It is designed to guide you. In this case, 2 is a main shaft support member, 3a and 3b are bearings, 4 is a main shaft, 7 is a blade holder, 10 is a fixing screw, 12 is a chunk, 13 'is a support member for a guide member, and w is a work.

[0005]

[Problems to be solved by the device]

 In the processing using the guide member for guiding the cutting tool such as the drill as described above, since the guide member exists and the cutting tool such as the drill pierces the work relatively deeply, the conventional chip suction removal device It is not possible to remove the chips using.

In view of the above situation, the present invention has made it possible to continuously remove the chips generated by the processing using a guide member such as a drill to another place by the flow of air. The purpose is to provide a device.

[0007]

[Means and Actions for Solving the Problems]

 In order to achieve the above object, in the present invention, a cylindrical guide portion for supporting a cutting tool such as a drill mounted on a spindle on the way to a work and guiding the tool so as to be displaceable in the axial direction is around a certain length of the cutting tool. It is formed in a shielded space room that has a space for surrounding it and is connected to an air suction pipe for sucking the air therein, while a vent hole is bored in the shaft of the cutting tool. One end is opened to the tip of the cutting tool, and the other end is opened to the atmosphere contact surface on the main shaft side located above the shielded space chamber.

During processing, the tip of the guide portion is brought close to the processing surface of the workpiece, and the air inside the shielded space chamber is sucked by the air suction pipe to a negative pressure. This negative pressure reaches the tip through the groove of the cutting tool, and in connection therewith, the atmosphere is sucked through the ventilation hole of the cutting tool and vigorously flows in from the opening of the ventilation hole at the cutting edge of the cutting tool. This air flow causes the chips generated by the cutting blade to move immediately and continuously smoothly along the groove of the cutting tool, to be guided into the shielded space chamber, and then to be removed to another place through the air suction pipe.

The present invention may be modified and implemented as follows, that is, a cutting tool such as a drill mounted on each of a plurality of spindles that are integrally moved relative to the work is directed toward the work. A cylindrical guide member for supporting along the way and guiding in a slidable manner in the axial direction thereof has a common space for enclosing a circumference of a certain length of the cutting tool, and for sucking air therein. The air suction pipe is connected to the shielded space room, and on the other hand, a vent hole is formed in the shaft of each blade, one end of which is opened at the tip of the blade tool and the other end is more open than the shielded space room. It is configured to open to the atmosphere contact surface on the main shaft side located above.

According to this, even when a work is processed by a cutting tool such as a drill attached to a plurality of main shafts, the chips have a relatively simple structure, and the air flow is the same as in the previous invention. It will be removed to another place.

[0011]

【Example】

 FIG. 1 is an explanatory sectional view showing the periphery of a machining head of a machine tool according to the present invention. A first embodiment will be described below with reference to this figure.

In the figure, reference numeral 1 is a machining head of a machine tool, and a main spindle 4 is rotatably supported by a main spindle support member 2 via bearings 3a, 3b. At this time, the spindle 4 is assumed to be moved in the axial direction of the spindle 4 in a body with the movement of the machining head 1. 5 is a seal ring packing, and 6 is a spacer ring.

The spindle 4 has a large-diameter portion 4a formed at its tip and an insertion hole 8 into which the cutting tool holder 7 is inserted and provided at the center thereof, and the peripheral wall portion of the insertion hole 8 is located at the innermost position in the atmosphere. An opening 9 is provided for communicating the side with the inside of the insertion hole 8, and a screw hole into which a fixing screw 10 for fastening the cutting tool holder 7 is screwed is provided at two locations near the tip of the same peripheral wall portion. It is said.

The blade holder 7 is provided with a shank 7 a to be inserted into the insertion hole 8 and a chuck 12 for grasping the blade 11 such as a drill. The shank 7a is provided with a flange portion k that is in contact with the tip end surface of the spindle 4 at the tip end, and a groove m in the spindle axis direction that engages with the tip end of the fixing screw 10 described above is provided on the peripheral surface portion. A blade insertion hole g into which the base end is inserted is provided, and further an air passage p having a smaller diameter than the hole is provided continuously to the blade insertion hole g, and the tip of this passage p is opened in the space s behind the shank 7a. It is supposed to be said.

The cutting tool 11 such as a drill is provided with a ventilation hole 11a at an axial position, one end of which is opened at the cutting tool tip end, and the other end is opened at a position where the base end of the cutting tool 11 communicates with the air passage p. It is supposed to be. When the cutting tool 11 is a drill as shown in this embodiment, it is preferable that the vent hole 11a be two holes along the spiral shape of the drill.

On the other hand, reference numeral 12 denotes a cutting tool inside means for sucking chips, which is provided in the vicinity of a fixed base (not shown) of the work w, and is a cylindrical shape fixed to a support member 13 ′ for guiding the cutting tool 11. The interior 13 and a shielded space chamber 14 provided above the guide portion 13 are provided.

Here, the tubular guide portion 13 is provided with a guide through hole 13a for guiding the peripheral surface of the cutting tool 11 such as a drill so that it can be slidably displaced in the axial direction and can be rotationally displaced about the same axis. It is supposed to be. In this case, if necessary, a radial notch 13b having an appropriate cross-sectional area is provided on the tip surface of the guide portion 12 to connect the atmosphere side with the inside of the guide through hole 13a. The notch 13b may be replaced with a through hole provided in the peripheral wall of the tubular guide portion 13.

The shielded space chamber 14 encloses the periphery of the cutting tool 11 above the cylindrical guide portion 13, and an opening p1 is provided in the peripheral wall 14a of the space thus enclosed, and a joint is formed in the opening p1. An air suction pipe 16 for sucking the air inside the shielded space 14 via 15 is connected.

A usage example and operation of the apparatus of this embodiment configured as described above will be described. The work is fixed to a fixed base (not shown), the tip end surface of the cylindrical guide portion 13 is brought into contact with the surface of the work w, and the air in the shielded space chamber 14 is sucked through the air suction pipe 16 by a separately prepared air suction device. Let After that, the spindle 3 of the machining head 1 retracted to a position away from the work w is rotated and the machining head 1 is moved to guide the tip of the cutting tool 11 to the guide through hole 13a. To approach the work.

When the movement amount of the processing head 1 reaches a certain value, the cutting tool 11 starts cutting the work w to generate chips. On the other hand, since the air is sucked from the air suction pipe 16, the air passes from the opening 9 of the main shaft 4 through the air passage p, the ventilation hole 11a, and the groove of the cutting tool 11 to the inside of the guide through hole 13a and the inside of the shielded space chamber 14. It will be in a state that it will flow vigorously toward. For this reason, the cutting chips ride on this air flow and reach the inside of the shielded space chamber 14, and are subsequently removed to another place through the air suction pipe 16.

When the amount of movement of the processing head 1 increases, the cutting tool 11 is in a state of deeply piercing the work w. Even in this case, the air flow flowing from the tip of the cutting tool 11 is generated by the cutting blade. Since the chips are immediately and continuously carried away, the chips are smoothly removed from the work w, even if the work is difficult to remove, such as an aluminum material.

However, depending on the processing conditions, there may be a case where the air flowing in from the ventilation hole 11a of the cutting tool 11 becomes insufficient. In such a case, the notch 13b is provided, and the air flows in from the notch 13b. The atmosphere compensates for the lack of air and creates the necessary air flow to ensure the smooth removal of chips.

In the present invention, the passage of the atmosphere through the ventilation hole 11a prevents the temperature rise of the cutting tool 11 and improves the machining accuracy, and the cutting chips are not immediately removed from the work w. Thus, the work w is prevented from being distorted by the heat of the high temperature cutting chips to improve the processing accuracy, and the cutting surface is prevented from being damaged, and the quality of the processing is improved.

Next, FIG. 2 is an explanatory cross-sectional view showing a periphery of a machining head of a machine tool according to a second embodiment of the present invention, and FIG. 3 shows a periphery of the machining head of the same embodiment as a tool guide for sucking chips. It is the figure seen from the bottom of the means, and the second embodiment will be explained below with reference to these figures.

The processing head 1 is of a multi-axis type, and the configuration related to each spindle 4 is the same as that of the previous embodiment.

The cutting tool guide means 12 for sucking chips is a cylindrical guide member 13A for guiding the peripheral surface of the cutting tool 11 such as a drill attached to each of the plurality of spindles 4, and these guide members 13A. A shielded space room 14 provided in association therewith is provided.

At this time, each tubular guide member 13A is provided with a cylindrical portion 13A1 and a flange portion 13A2, and is bolted to the peripheral wall 14a of the shielded space 14 chamber via the flange portion 13A2. The guide through hole 13a of the cylindrical portion 13A1 does not allow the blade tool 11 to be slidably displaced in the axial direction thereof and rotatable about the same axis, and the tip portion of the cylindrical portion 13A1 is the main part of the blade tool. It serves as a guide unit 13. An opening m is formed by cutting a part of the peripheral wall of the cylindrical portion above the guide portion 13.

The shielded space chamber 14 does not have to surround all of the openings m of each cylindrical guide member 13A with a box-shaped peripheral wall 14a, and connects an air suction pipe for sucking inward air. Is provided with a connection port p2. In this embodiment, since there is one connection port p2, all the openings m are directed to this connection port p2. Note that a plurality of connection ports p2 can be provided, and in this case, the orientation of each opening m is appropriately determined.

The work fixing base 17 has a recess 17a in which the work w is positioned, and is provided with a fastening bolt 18 for fastening the work w. The upper surface of the work fixing base 17 has a protruding portion of the shielded space chamber 14. A blade guide means 12 for sucking chips is bolted via 14A.

When processing is performed by the apparatus of this embodiment having the above-described configuration, the processing head 1 is moved to move the plurality of spindles 4 integrally toward the work w, and the cutting tools 11 are simultaneously attached to the plurality of guide members 13A. The air in the shielded space chamber 14 is sucked from the connection port p2 through the air suction pipe.

The chips generated by each cutting tool 11 during the processing of the work w enter the shielded space chamber 14 from the opening 9 of the main shaft 4 through the air passage p, the ventilation hole 11a, the guide through hole 13a and the opening m. It is guided to the inside of the shielded space chamber 14 by the flow of the inflowing air, and is then removed to another place through the air suction pipe.

Such a chip removing action is substantially the same as that in the previous embodiment except that the chips are collected in one shielded space chamber 14 through the plurality of openings m. Become.

In the present embodiment, the shielded space chamber 14 surrounding the plurality of openings m has a simpler structure than the case where each guide member 13A is provided, and the shielded space chamber 14 is provided. That the peripheral wall 14a of 14 and the guide member 13A are independent makes it easy to make the material of the guide member 13A different from that of the peripheral wall 14a of the shielded space chamber 14 and the replacement of the exhausted guide member 13A is easy. And eggplant

Instead of moving the machining head 1 in each of the above-described embodiments, the work w may be moved together with the fixing table, and the cutting tool suction tool guide means 12 is integrated with the machining head 1. It is also possible to fix the blade to a specific position in the length direction of the cutting tool.

[0035]

[Effect of device]

 According to the present invention configured as described above, even in the processing using the guide member of the cutting tool, the chips generated during the processing can be immediately and continuously removed from the work by the air flow and collected at a specific place. It is something to say.

Further, according to the present invention, since the air is introduced from the tip of the cutting blade, the chips are smoothly removed even when the work is deeply drilled, and especially when cutting a workpiece such as an aluminum material. It effectively contributes to the machining of workpieces that are easily clogged with powder, and that the atmosphere flowing through the ventilation holes prevents the temperature of the cutting tool from rising during machining, improving machining accuracy, and further cutting chips. Immediate removal from the work will prevent the work from being distorted by the heat of the cutting chips, improve the machining accuracy, and prevent damage to the machined surface of the work.

According to the second aspect of the present invention, even if the machining head is provided with a plurality of main shafts, the chip can be treated according to the first aspect by a simple means. Becomes

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing a periphery of a machining head of a machine tool according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional explanatory view showing the periphery of a machining head of a machine tool according to a second embodiment of the present invention.

FIG. 3 is a view of the periphery of the machining head of the embodiment as seen from below a cutting tool guide means for sucking chips.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 4 Spindle 11 Blade 11a Vent hole 12 Chip suction blade guide means 13 Guide portion 13A Guide member 14 Shielded space chamber 16 Air suction pipe m Opening w Work

Claims (2)

[Scope of utility model registration request] 1. A space for surrounding a fixed length of a cutting tool by a cylindrical guide portion for supporting a cutting tool such as a drill mounted on a main shaft on the way to a work and guiding the tool movably in the axial direction. Is formed in a shielded space chamber to which an air suction pipe for sucking the air therein is connected, and on the other hand, a vent hole is bored in the shaft of the cutting tool, one end of which is opened at the tip of the cutting tool. At the same time, the other end is a device for suction and removal of chips of a machine tool, characterized in that the main shaft side located above the shielded space is opened to the atmosphere contact surface. 2. A tool for supporting a cutting tool such as a drill mounted on each of a plurality of spindles that are integrally moved relative to a work piece on the way to the work piece and guiding the tool in a slidable manner in the axial direction. The tubular guide member has a common space for enclosing a circumference of a certain length of the cutting tool, and is formed in a shielded space chamber to which an air suction pipe for sucking air therein is connected, while each cutting tool is formed. Ventilation holes are formed in the shaft of the shaft, one end of which is opened at the tip of the cutting tool, and the other end of which is opened at the spindle contact side above the shielded space chamber to the atmosphere contact surface. Suction removal device for machine tools.