JP2000233340A - Chip removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and positively remove chips without changing the working condition or occupying a large space. SOLUTION: A guide member 6 is fitted-locked into a tool holder 2 mounted on a spindle 3, and a cylindrical device body 7 fitted onto a cutting tool is slidably fitted into the guide member 6. Energizing force of a compression spring 11 is applied to the rear end of the device body 7 through a spring plate 9 and a sliding body 8. The device body 7 has an expansion part 12 at the tip, and plural grooves 13 are provided in the expansion part 12. Chips 14 generated in drilling of a work 4 collide with the expansion part 12 to radially move, and receive resistance from the grooves 13 to be cut into fine pieces to scatter. On the other hand, since striking of chips 14 is strengthened in response to the progress of processing, the device body 7 is retracted to the spindle 3 side, and thus the interference of the device body 7 with the work 4 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip removing device which separates and discharges chips generated by cutting with a cutting tool which rotates integrally with a spindle, for example, a drill for drilling, a cutting tool for boring, and the like.

[0002]

2. Description of the Related Art In drilling, boring, and the like, cutting chips are entangled with a cutting tool and accumulate, which tends to cause deterioration of processing accuracy and damage to the cutting blade. It is desirable.

[0003]

By the way, a drill for boring and a cutting tool for boring cannot provide a chip breaker for a lathe cutting tool due to its unique blade shape. The swarf entangled with the cutting tool was exclusively removed manually.
In this case, there is no particular problem while the length of the chips is short, but when the length of the chips is long, the chips are firmly entangled with the cutting tool, making it extremely difficult to remove the chips. There were many problems in terms of gender.

[0004] In some cases, chips are cut by performing inching, or after the processing is completed, cutting chips are removed by applying a holding jig to a blade that is being returned. In this case, the cycle time is extended and productivity is sacrificed. In addition, it is difficult to guarantee accuracy due to steps and the like, and in the latter case, a special device for operating the jig is required. In addition to increasing the cost burden and avoiding interference with the work and peripheral equipment, the installation of the jig is greatly restricted, and these are all problematic measures.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a simple and reliable method without changing processing conditions or occupying a large space. An object of the present invention is to provide a chip removing device capable of removing chips.

[0006]

In order to achieve the above-mentioned object, the present invention comprises a cylindrical device main body having a conical expanded tip, and the device main body is fitted to the cutting tool, A base end is operatively connected to the spindle or a tool holder mounted on the spindle via a biasing means. In the present invention, the device main body may be configured such that a concave portion or a convex portion that promotes cutting of chips is provided in an expanded portion at the tip.

In the thus configured chip removing device, the chip generated by cutting collides with the extended portion at the tip of the device body, flows in the radial direction, and is separated. In addition, since the device body retreats in the axial direction due to the chip discharging force,
Even if the cutting depth increases, it does not interfere with the work.
When a concave portion or a convex portion is provided in the expanded portion, the chips flowing on the surface of the expanded portion receive the resistance of the uneven portion and are further divided, so that even when the target is a ductile material, the chips can be efficiently cut. Can be removed.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show a chip removing device according to a first embodiment of the present invention. The first embodiment is applied to drilling. A cutting tool (drill) 1 is mounted on a spindle 3 of a machine tool via a tool holder 2, and the cutting tool 1 is integrally formed with the spindle 3. By moving the work 4 toward the work 4 while rotating, the hole 4 a is cut in the work 4. Thus, around the cutting tool 1, a chip removing device 5 according to the present invention is provided.

The chip removing device 5 includes a hollow guide member 6 fitted and fixed to the small diameter portion 2a of the tool holder 2 and a cutting tool 1, and a base end portion of which is attached to a distal end portion of the guide member 6. A cylindrical device main body 7 slidably fitted into the formed concave hole 6a, and a plurality of inclined holes 6b equally distributed in the circumferential direction on the guide member 6 and formed to be inclined with respect to the axis. A sliding body 8 fitted in the sliding body 8, a leaf spring 9 connecting the sliding body 8 to the base end of the apparatus main body 7,
A compression spring (biasing means) 11 for urging the sliding body 8 forward by engaging one end with a plug 10 screwed to the open end of the inclined hole 6b. The device main body 7 has its distal end portion expanded in a conical shape.
Grooves (recesses) 1 of various shapes and sizes
3 are provided.

In the chip removing device 5 configured as described above, when the spindle 3 is rotated, the cutting tool 1 and the chip removing device 5 rotate integrally therewith. Then, in this state, when the cutting tool 1 is advanced toward the work 4, drilling by the cutting tool 1 is started, and the cutting chips 14 generated by this processing are slightly outwardly curved along the cutting tool 1. Elongate. At this time, since the extended portion 12 of the apparatus main body 7 exists in the direction in which the chip 14 extends, the chip 14 collides with the extended portion 12 as shown in FIG. During this time, due to the resistance of the groove 13 on the surface of the expanded portion 12, it undergoes a large shearing action and is divided into small pieces and scattered around. Then, the drilling of the work 4 by the cutting tool 1 progresses, and the penetration depth of the cutting tool 1 into the work 4 increases, and when the apparatus main body 7 moves forward, the contact of the chips 14 against the expanded portion 12 of the apparatus main body 7 becomes strong. The apparatus body 7 deflects the compression spring 11 via the leaf spring 9 and the slide body 8 and retreats to the spindle 3 side, whereby interference between the apparatus body 7 and the work 4 is avoided, and chips are smoothly removed. Removal proceeds.

As described above, the present chip removing device 5 does not have any special driving means and has a simple and small structure that surrounds the blade 1, so that there is no fear of interference with the work 4 and peripheral equipment. There is no need to perform the above operation, and the present invention can be easily implemented for a rotary cutting tool such as the drill 4 described above. In addition, since no change is made to the processing method, the cycle time is not extended and the processing accuracy is not reduced.

FIGS. 4 and 5 show a chip removing apparatus according to a second embodiment of the present invention. The feature of the present chip removing device 5 ′ is that the device main body 7 used in the first embodiment is directly operatively connected to the spindle 3 via the spring means 20. This spring means 20
Is formed by extending a spring-shaped spring body 21 into a frusto-conical shape, and is provided between the base end of the apparatus main body 7 and the front end of the spindle 3 through bases 22 and 23 fixed to both ends thereof. Is equipped.

In the second embodiment, the work 4
When the spindle 3 is rotated to machine the hole 4a (FIG. 1), the blade 1 (FIG. 1) and the chip removing device 5 'rotate integrally therewith. Then, when the cutting tool 1 is advanced to start the boring processing, the chips 14 (FIG. 1) generated by this processing elongate while curving slightly outward along the cutting tool 1 as in the first embodiment. Then, it collides with the expanded portion 12 of the apparatus main body 7 and is divided into small pieces and scattered around due to the resistance of the groove (recess) 13 on the surface thereof. Then, the drilling of the work 4 by the cutting tool 1 progresses, and the penetration depth of the cutting tool 1 into the work 4 increases, and when the apparatus main body 7 moves forward, the contact of the chips 14 against the expanded portion 12 of the apparatus main body 7 becomes strong. ,
The apparatus main body 7 bends the spring body 21 of the spring means 20 and retreats to the spindle 3 side, whereby interference between the apparatus main body 7 and the work 4 is avoided, and the removal of chips proceeds smoothly.
In the second embodiment, since the apparatus main body 7 is directly supported by the spring means 20 as the urging means, the guide member 6 as in the first embodiment can be used.
The sliding body 8, the leaf spring 9 and the like become unnecessary, and the structure becomes simpler.

In each of the above embodiments, the groove (concave portion) 13 is provided in the expanded portion 12 of the apparatus main body 7. However, a convex portion may be provided instead of the concave portion 13. is there. Further, in each of the above-described embodiments, an example in which the present invention is applied to a horizontal machine tool that performs machining by moving a cutting tool in a horizontal direction (horizontal direction) has been described. Needless to say, the present invention can also be applied to a vertical machine tool in which the cutting tool is moved. However, when the first embodiment is applied to a vertical machine tool, it is necessary to provide an appropriate stopper for restricting the device main body 7 from falling off the guide member 6.

[0016]

As described above, according to the swarf removing device of the present invention, since there is no special driving means and the structure is simple and small enough to surround the cutting tool, Without having to worry about interference with
It can be implemented simply and inexpensively for rotary blades. Further, since no change is made to the processing method, productivity is not sacrificed, and there is no need to worry about a decrease in processing accuracy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a chip removing device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing the present chip removing device.

FIG. 3 is a plan view showing a tip shape of an apparatus main body used in the present invention.

FIG. 4 is a sectional view showing a structure of a chip removing device according to a second embodiment of the present invention.

FIG. 5 is a plan view taken along the line A in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Tool holder 3 Spindle 4 Work 5, 5 'Chip removal device 6 Guide member 7 Main body 11 Compression spring (biasing means) 12 Expansion part of guide member 13 Groove (recess) 14 Chip 20 Spring means (with Force means)

Claims (2)

[Claims] 1. A device for removing chips generated by cutting with a cutting tool rotating integrally with a spindle, comprising a cylindrical device main body having a tip portion expanded in a conical shape, and fitting the device main body to the cutting tool. A chip removing device, wherein a base end thereof is operatively connected to the spindle or a tool holder mounted on the spindle via a biasing means. 2. The chip removing device according to claim 1, wherein a concave portion or a convex portion for facilitating cutting of the chip is provided in an extended portion at a tip end of the device main body.