JPH10118881A - Air blow tool for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely blow chips from the workpiece and workpiece head without narrowing a free area for workpiece machining work and without increasing the cost of the equipment. SOLUTION: An air blow tool 51, which is used mounted on the spindle of a tool head, is provided. This tool 51 is provided with a fitting section 54, which is air-tightly fitted to the mounting hole of the spindle, a pull-stud section 55, which is chucked by the spindle, an air passage, which is communicated to the mounting hole of the spindle and an air blow nozzle 52, which is communicated to the end section of the air passage 59. Therefore, chips can surely be blown from a workpiece and work head by introducing the air injected from the mounting hole of the spindle to the air blow nozzle 51 through the air passage 59 while relatively moving the tool head in the X, Y and Z directions to the workpiece and work head and forcibly spouting the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air blow tool for a machine tool used to blow off chips generated during a machining operation in the machine tool.

[0002]

2. Description of the Related Art In a machine tool, it is necessary to blow off chips generated by a machining operation from a workpiece or a work head in order to eliminate variations in machining accuracy of the workpiece. For this reason, conventionally, an air blow nozzle capable of ejecting compressed air by a pressing machine is installed near a machine tool. This air blow nozzle is installed near the operator in a portable form in a machine tool in which a human manually performs a processing operation. On the other hand, in a numerically controlled machine tool that performs a machining operation without manual intervention, the air blow nozzle is generally fixed near the work. In particular, automatic tool changers (AT
C: A machining center equipped with an automatic tool changer) that performs different machining operations sequentially
Since it is necessary to blow off chips from the work and the work head every time the tool is replaced, it is essential to set the air blow nozzle near the work.

[0003]

The air blow nozzle is
It is set at a position that does not interfere with the processing operation. For this reason, depending on the shape of the work and the like, it may not be possible to sufficiently blow off the chips unless a plurality of air blow nozzles are arranged. In this case, the equipment cost for installing a plurality of air nozzles becomes expensive, which is inconvenient. In addition, as the number of air blow nozzles increases, a problem arises in that the free area of the working operation on the work is reduced as the number of air blow nozzles increases. In addition, even if the number of air blow nozzles is increased, there may be a region where cutting chips cannot be blown off depending on the shape of the work and the like, and in this case, variation in the processing accuracy of the work due to the cutting chips is allowed. There is also the problem of having to do it.

An object of the present invention is to provide an air blow tool for a machine tool which can surely blow off chips from a work and a work head without narrowing a free area of machining work on the work and without increasing equipment costs. Is to get.

[0005]

According to a first aspect of the present invention, there is provided an air blow tool for a machine tool, comprising: a fitting portion hermetically fitted into a mounting hole provided in a spindle of a tool head; and a pull stud portion chucked by the spindle. An air passage communicating with the spindle mounting hole with the fitting portion fitted to the spindle and the pull stud portion being chucked, and an air blow nozzle having a smaller diameter than the spindle mounting hole communicating with the end of the air passage. Is provided.

Therefore, the air blow tool of the present invention is ready for use by fitting the fitting portion into the mounting hole of the spindle and chucking the pull stud portion to the spindle. That is, if air is blown from the mounting hole of the spindle in this state, the air is guided to the air blow nozzle through the air passage and is blown out from the tip. At this time, since the diameter of the air blow nozzle is smaller than the diameter of the mounting hole of the spindle, the air is compressed in the air blow tool and gushes from the air blow nozzle. Therefore, by moving the tool head relative to the work and the work head in the XYZ axis directions, chips are reliably blown off from the work and the work head. In this case, since the air blow tool is used by being attached to the spindle, the free area of the machining operation is not narrowed at the time of machining the work by attaching the tool to the spindle.

According to a second aspect of the present invention, there is provided an air blow tool for a machine tool, wherein the collet holder hermetically fits into a mounting hole provided in a spindle of a tool head and a fastening ring is screwed to a tip end thereof, and a rear end of the collet holder. A pull stud fixed to the portion and chucked to the spindle, a communication passage formed in the pull stud and communicating the mounting hole of the spindle and the inner hole of the collet holder, and a communication between the tip end of the collet holder and the fastening ring. A resilient chuck having a nozzle hole at a central portion which is interposed therebetween and resiliently deformed by screwing of the fastening ring, and a spindle which fits into the nozzle hole of the resilient chuck and has an end communicating with the inner hole of the collet holder. And an air blow nozzle having a smaller diameter than the mounting hole.

Therefore, the air blow tool of the present invention is ready for use by fitting the collet holder into the mounting hole of the spindle and chucking the pull stud to the spindle. In other words, if air is blown from the mounting hole of the spindle in this state, the air is guided from the communication passage of the pull stud to the air blow nozzle through the inner hole of the collet holder, and is jetted from the tip. At this time, since the diameter of the air blow nozzle is smaller than the diameter of the mounting hole of the spindle, the air is compressed in the air blow tool and gushes from the air blow nozzle. Therefore, by moving the tool head relative to the work and the work head in the XYZ axis directions, chips are reliably blown off from the work and the work head. In this case, since the air blow tool is used by being attached to the spindle, the free area of the machining operation is not narrowed at the time of machining the work by attaching the tool to the spindle.

According to the second aspect of the present invention, the collet holder itself has a conventional structure simply by forming a communication passage in the pull stud and providing the elastic chuck and the air blow nozzle. Therefore, the air blow tool is configured easily and inexpensively.

[0010] According to a third aspect of the present invention, in the air blow tool for a machine tool according to the first or second aspect, the air blow nozzle is bent and its tip is directed in a predetermined direction. Therefore, it is possible to eject air even in a region such as the back side of the work where air is normally hard to reach or not reach at all. Therefore, chips are more reliably blown off from the work and the work head.

[0011]

FIG. 1 shows a first embodiment of the present invention.
A description will be given with reference to FIG. FIG. 1 is a vertical sectional side view of the air blow tool. The air blow tool 51 according to the present embodiment is used, for example, in a machining center 1 as shown in a plan view of a main part in FIG. 2 and a front view in FIG.
Therefore, first, a schematic configuration of the machining center 1 will be described.

[Schematic Configuration of Machining Center 1] As shown in FIG. 2, the machining center 1 has a plurality of work heads 2, 3, a plurality of tool heads 4, 5, and a work W (see FIG. An automatic tool changer (not shown) for automatically supplying various tools to the tool heads 4 and 5 automatically. As shown in FIG. 3, the main table 7 of the machining center 1 is provided with tables 8 and 9 for supporting the work heads 2 and 3, respectively, so as to be able to reciprocate.

The work heads 2 and 3 have chucks 2a and 3a for holding the work W in a fixed manner. The tool heads 4 and 5 include spindles 4a and 5a to which a plurality of types of tools (not shown) including an air blow tool 51 are attached and rotate. These spindles 4a, 5a
Has a mounting hole for fitting a tool, and a chuck mechanism for chucking the tool fitted in the mounting hole (both not shown). Further, a pressing machine (not shown) for supplying air to the mounting holes of the spindles 4a and 5a is attached to the tool heads 4 and 5. Therefore, in the tool heads 4 and 5, air is blown from the mounting holes of the spindles 4a and 5a.

Next, the work heads 2, 3 are movable in the X-axis direction in FIG. It is free to turn inside. Work head 2,
The turning center C of No. 3 is as shown in FIG. The chucks 2a and 3a provided on the work heads 2 and 3 are partially openable and closable for gripping and releasing the work W, and are entirely in the axial direction of the tool heads 4 and 5 (Z in FIG. 2). Axial direction)
It can be moved in parallel with. Furthermore, tool heads 4 and 5
Is provided movably in the Y-axis direction in FIG. These movable parts are driven by applying a driving force from a driving source (not shown) such as a servomotor.

The machining center 1 includes a microcomputer (not shown) as an essential component. This microcomputer supplies a drive control signal to a driver (not shown) of a drive source of each unit according to the setting. As a result, the drive source of each unit is drive-controlled, and each unit is driven. That is,
The chucks 2a and 3a open and close to hold and release the work W, and the work heads 2 and 3 move in the X-axis direction in FIG. The work heads 2 and 3 pivot about the pivot axis C, and the tool heads 4 and 5 move in the Y-axis direction in FIG. The processing operation of the workpiece W in the machining center 1 is executed by a combination of operations of the respective components that are driven and controlled by the microcomputer.

[Configuration of Air Blow Tool 51]
The configuration of the air blow tool 51 will be described. As shown in FIG. 1, the air blow tool 51 includes a pull stud 56 that forms a pull stud portion 55 by forming a fitting portion 54 at a rear end portion of a tool body 53 having an air blow nozzle 52 integrally formed at a front end. Are formed by screwing. In other words, the fitting portion 54 is formed in a tapered shape that fits tightly into the tapered mounting holes provided in the spindles 4a and 5a of the tool heads 4 and 5, and the pull stud portion 55
Is formed in such a shape as to be chucked by a chuck mechanism provided in the spindles 4a and 5a. An inner hole 57 communicating with the air blow nozzle 52 is formed inside the tool main body 53, and the inner hole 5 is formed in the pull stud 56.
A communication passage 58 in the form of a hole communicating with the communication path 7 is formed. As a result, the tool body 53 is pulled from the rear end of the pull stud 56.
An air passage 59 extending through the air passage nozzle 52 to the air blow nozzle 52 is formed.
The configuration is such that the mounting holes a and 5a communicate with the air blow nozzle 52. Here, the air blow nozzle 5
The inner diameter of 2 is smaller than the mounting holes of the spindles 4a and 5a.

[Working Operation of Work W by Machining Center 1] The working operation of the work W by the machining center 1 will be described. First, the work W is set in the automatic work supply device 6, and when the machining center 1 is instructed to execute a machining operation, a first operation is performed. In the first operation, the target tool is mounted on the spindles 4a and 5a of the tool heads 4 and 5 by the automatic tool changer.
The work W is inserted into the chuck 2a of one of the work heads 2 at a position indicated by a solid line in FIG. Immediately thereafter, the chuck 2a of the work head 2 is closed and the work W is gripped. Subsequently, the work head 2 is turned around the turning center C until the axis of the chuck 2a is parallel to the Z axis. During or after this operation, the work head 2 moves in the X-axis direction of the table 8. Is moved to a position facing the tool head 4. Such a series of operations is a first operation.

After the end of the first operation, a second operation for performing a predetermined processing on the work W is performed. In this second operation,
The spindle 4a of one of the tool heads 4 rotates and the tool is rotationally driven, and the work head 2 and the tool head 4 are moved in the X-direction according to the tool to be used and the processing location of the work W.
It is relatively moved in the YZ axis directions. Thereby, the work W
Is subjected to predetermined processing at predetermined positions. Fig. 4
(A). For the workpiece W, except for the outer peripheral surface w1 and one end surface w2 gripped by the chuck 2a, the opposite outer peripheral surface w3, inner peripheral surfaces w4, w5, and stepped surface w
6. Processing of the other end face w7 and the like is possible.

The second operation is repeated a plurality of times as necessary. That is, when the machining operation of the workpiece W by a certain tool is completed, another tool is mounted on the spindle 4a of the tool head 4 by an automatic tool changer as necessary, and different types of machining operations are performed on the workpiece W. . Then, in a plurality of machining operations after exchanging such a tool, a chip removing operation is performed on the work W and the work head 2 as necessary.

The chip removing operation is performed by attaching the air blow tool 51 to the spindle 4a of the tool head 4 by an automatic tool changer. That is, the respective parts are driven so that the air blow tool 51 mounted on the spindle 4a faces the desired position of the work W and the work head 2, and in this state, the driving of the pressing machine of the tool head 4 and the spindle 4 are performed.
and the rotation drive of a is performed simultaneously. Thus, the air discharged from the mounting hole of the spindle 4a is guided to the air blow nozzle 52 through the air passage 59 of the air blow tool 51, and is jetted from the tip of the air blow nozzle 52. At this time, since the air blow nozzle 52 has a smaller diameter than the mounting hole of the spindle 4a, the air is compressed in the air blow tool 51 and gushes out from the air blow nozzle 52. Thus, the chips are reliably blown off from the work W and the chuck 2a of the work head 2. In this case, since the air blow tool 51 is used by being attached to the spindle 4a, the free area of the machining operation is not narrowed when the work W is machined by attaching the machining tool to the spindle 4a.

After the end of the second operation, a third operation is performed. In the third operation, transfer of the work W from one work head 2 to the other work head 3 is performed. In other words, the work head 3 which is responsible for processing as the next process
Is opened, and the work heads 2 and 3 are turned by the operation of the turning drive unit, so that the chucks 2a and 3a face each other on the same axis (on the X axis in FIG. 3). Then, as the tables 8, 9 move in the X-axis direction, the work heads 2, 3 approach each other, as indicated by phantom lines in FIG. Then, the workpiece W gripped by the chuck 2a on the supply side is
When inserted into a, the tables 8 and 9 are stopped, and the chuck 3a on the receiving side is closed, and immediately thereafter, the chuck 2a on the supplying side is opened. Such a series of operations is a third operation.

After the end of the third operation, the first operation is executed on the work head 2 to which the work W has been delivered after the above-described chip removing operation is performed, and the next work W is executed.
Is gripped by the chuck 2a, and then the second operation is executed to process the work W.

After the end of the third operation, the fourth operation is performed on the work head 3 to which the work W has been delivered. In the fourth operation, after the workpiece W is made to face the tool mounted on the spindle 5a of the tool head 5, a processing operation of the workpiece W corresponding to the second operation is performed. In this case, on the work head 3, as shown in FIG.
The portion of the work head 2 which has not been gripped by the chuck 2a is gripped by the chuck 3a. In this example, the inner peripheral surface w4 of the work W is gripped. This allows
The outer peripheral surface w1 and the end surface w2 can be accurately cut with reference to the center of the inner peripheral surface w4 already processed in the previous step using the tool head 4. Then, in such a fourth operation, the work W and the work head 3
, A chip removing operation is performed.

Therefore, after the end of the third operation, the execution of the second operation in the work head 2 and the execution of the fourth operation in the work head 3 are performed in parallel, so that the two work heads 2 , 3 will be executed in parallel.

When the fourth operation is completed, one work W
Is completed. Therefore, in this case, as a fifth operation, the work head 3 is moved to a predetermined position, the chuck 3a is opened, the work W which has been gripped up to that point is removed from the chuck 3a, and a discharge mechanism such as a chute (not shown). An operation of dropping the device up and discharging it to a predetermined position is performed.

After the end of the fifth operation, the work head 3 from which the work W has been discharged is prepared for the third operation after the above-described chip removing operation is performed.

A second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a vertical sectional side view of the air blow tool. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The air blow tool 61 according to the present embodiment
It is configured using an existing collet holder 62 and the like. That is, the spindles 4a, 5 of the tool heads 4, 5
collet holder 6 hermetically fitted into the mounting hole provided in a
2 are provided. A fastening ring 63 is screwed into the collet holder 62 at the tip thereof. The fastening ring 63 is used to clamp and fasten a collet chuck (not shown) provided at the tip of the collet holder 62. The collet holder 62 has a hollow structure having an inner hole 64 in advance.

A pull stud 65 is screwed to the rear end of the collet holder 62. The pull stud 65 is an existing one having a communication passage 66 penetrating the axis thereof. Normally, the communication passage 66 formed in the pull stud 65 allows the cutting oil supplied from the mounting holes of the spindles 4a and 5a to pass therethrough, and
It is used to feed into the second inner hole 64.

Next, an elastic chuck 68 with an air blow nozzle 67 is clamped between the tip of the collet holder 62 and the fastening ring 63. The elastic chuck 68 fits into a tapered chuck hole 69 formed at the distal end of the collet holder 62, and is elastically deformed by screwing in the fastening ring 63, thereby fitting into the central nozzle hole 70. The structure is such that the combined air blow nozzle 67 is strongly clamped. The air blow nozzle 67 pinched by the elastic deformation of the elastic chuck 68 is
The inner diameter is formed smaller than the mounting holes of the spindles 4a and 5a, and communicates with the inner hole 64 of the collet holder 62.

In such a configuration, the air blow tool 61 of the present embodiment, like the air blow tool 51 of the first embodiment, also performs a chip removing operation in the machining center 1 illustrated in FIGS. 2 to 4, for example. Used for That is, the air discharged from the mounting hole of the spindle 4a is guided to the air blow nozzle 67 through the communication passage 66 of the pull stud 65 and the inner hole 64 of the collet holder 62 in order, and is ejected from the tip of the air blow nozzle 67. The chips are reliably blown off from the work W and the chucks 2a and 3a of the work heads 2 and 3.

In the air blow tool 61 according to the present embodiment, the existing collet holder 62 and pull stud 65 can be used. For this reason, the air blow tool 62 is configured easily and inexpensively.

FIG. 6 is a vertical sectional side view showing a first modified example of the air blow tool 61. In the first modified example, a cut is made in a part of the outer peripheral surface of the pull stud 65 to form a communication passage 66. The communication holes 66 also allow the mounting holes of the spindles 4a and 5a to communicate with the inner holes 64 of the collet holder 62.

FIG. 7 is a vertical sectional side view showing a second modification of the air blow tool 61. In this second variant,
The air blow nozzle 67 is bent, and its tip is directed in a desired direction. Thus, the air can be ejected by rotation of the spindles 4a, 5a even in a region such as the back side of the work W, where air is normally hard to reach or not reach at all, and the work W and the work heads 2a, 3a can be more reliably. Chips are blown away.

The modifications shown in FIGS. 6 and 7 can be applied to the air blow tool 51 having the structure shown in the first embodiment.

[0036]

According to the present invention, the air ejected from the mounting hole provided in the spindle of the tool head is guided to the air blow nozzle having a smaller diameter than the mounting hole, and the air is blown out from the air blow nozzle. −
By freely moving in the YZ axis direction, chips can be reliably blown off from the work and the work head, and therefore, high-precision processing without variation in processing accuracy can be performed on the work. In this case, since the air blow tool is used by being attached to the spindle, the free area of the work is not narrowed during the work of machining the work by attaching the tool to the spindle, so that the free area of the work is sufficiently secured. be able to. And since an air blow tool is comprised as a kind of tool attached to the spindle of a tool head, the removal of a workpiece | work and a swarf from a work head can be performed inexpensively, without increasing equipment cost.

In the air blow tool for a machine tool according to the second aspect of the present invention, only the communication passage is formed in the pull stud and the elastic chuck and the air blow nozzle are provided. Since it can be configured, an air blow tool can be easily and inexpensively obtained.

According to the third aspect of the present invention, since the air blow nozzle is bent and its tip is directed in a predetermined direction, the air is blown to an area such as the back side of the work where air normally hardly reaches or does not reach at all. The chips can be sprayed, so that the chips can be more reliably blown off from the work and the work head.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of an air blow tool according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a main part of a machining center to which the air blow tool according to the present embodiment is mounted.

FIG. 3 is a front view thereof.

FIG. 4 is a cross-sectional view illustrating a gripped state of a work.

FIG. 5 is a vertical sectional side view of an air blow tool showing a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional side view showing a first modified example.

FIG. 7 is a longitudinal sectional side view showing a second modified example.

[Explanation of symbols]

 4,5 Tool head 4a, 5a Spindle 52,67 Air blow nozzle 54 Fitting part 55 Pull stud part 59 Air passage 62 Collet holder 63 Fastening ring 65 Pull stud 64 Inner hole of collet holder 66 Communication passage 68 Elastic chuck 70 Nozzle hole

Claims (3)

[Claims] 1. A fitting portion hermetically fitted into a mounting hole provided in a spindle of a tool head, a pull stud portion chucked by the spindle, and the pull stud fitted by the fitting portion to the spindle. An air passage communicating with the mounting hole of the spindle in a state where the portion is chucked; and an air blow nozzle having a smaller diameter than the mounting hole of the spindle communicating with an end of the air passage. Air blow tools for machine tools. 2. A collet holder hermetically fitted into a mounting hole provided in a spindle of a tool head, and a fastening ring is screwed to a front end thereof. The collet holder is fixed to a rear end of the collet holder and chucked by the spindle. A pull stud, a communication passage formed in the pull stud and communicating the mounting hole of the spindle with an inner hole of the collet holder, and a clamp stuck between a tip end of the collet holder and the fastening ring. An elastic chuck having a nozzle hole at a central portion which is elastically deformed by screwing of the fastening ring; and the spindle which fits into the nozzle hole of the elastic chuck and has an end communicating with the inner hole of the collet holder. And an air blow nozzle having a smaller diameter than the mounting hole. 3. The air blow tool for a machine tool according to claim 1, wherein a tip of the air blow nozzle is directed in a predetermined direction by bending.