JP2004058244A - Chip scattering prevention cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chip scattering prevention cover capable of surely catching chips at generating part without scattering the generated chips and sucking and collecting the chip by a dust catcher. <P>SOLUTION: The chip scattering prevention cover 10 fixedly arranged on an upper surface of a cutting tool 2 and sucking and collecting the chips generated by cutting a workpiece 11 with the cutting tool 2 to prevent the scattering of the chip, is provided with a chip passing part 3 introducing the chips into the cover and an air suction port sucking air at a transverse cutting edge base part of the cutting tool 2. A tip outer surface 8 of the cover facing the workpiece 11 retreats in reverse direction of the workpiece 11 by a designated dimension A from cutting edge tip of the cutting tool 2. A designated dimension B is maintained between a end surface of the cover facing the cutting tool 2 and a cutting edge tip surface of the cutting tool 2. And also the chip scattering prevention cover 10 is provided with a sucking part 7 provided in a reverse side of the tip of the cover and sucking chips in the cover. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a machine tool, and more particularly, to a chip scattering prevention cover for sucking and collecting chips generated during cutting such as finish cutting of a commutator surface and preventing chips from scattering. About.
[0002]
[Prior art]
It is inevitable that chips will be generated during cutting.However, if chips are left on the workpiece or scattered chips adhere to the workpiece again, product defects or failures may occur. In some cases, a step of removing such chips is required. Also, if chips are scattered and adhere to the machine tool or scatter around, it may cause a failure of the machine tool or an accident, etc., so a process of treating such scattered chips is also required. . From such a viewpoint, a chip scattering prevention cover is required and has been devised and used for chip scattering prevention and chip collection.
[0003]
For example, there is a conventional chip scattering prevention device 20 as shown in FIG. 4 as an example of chip scattering prevention. Such a device sucks chips generated together with air by a suction nozzle 21 connected to a dust collector when cutting a workpiece 11 such as a commutator by a cutting tool 2 mounted on a machine tool. It is intended to collect and prevent chips from scattering. The suction nozzle 21 is provided separately from the cutting tool 2 and has a simple structure. However, as shown in FIG. Must be installed at some distance from each other. Therefore, due to the configuration in which a certain space is present between the suction nozzle 21 and the workpiece 11 and the cutting tool 2, it is possible that some chips are not collected by the suction nozzle 21 and scattered. Inevitable.
[0004]
Conventional chip scattering prevention covers include those that prevent chips generated by the above-mentioned cutting work from scattering outside the equipment and those that guide flow-type continuous chips to a predetermined position. There is. However, when there are multiple grooves on the surface such as commutators and chips are separated shortly, chips generated at the cutting point and sliding on the rake face of the cutting tool are In addition, there is a problem in that the chips are scattered in various directions due to the elastic force, or chips that hit the inner surface of the cover for preventing scattering outside the equipment enter the grooves being processed. Chips in the groove are taken out with a brush or the like. However, if the brush is hardened so that it can be taken out without fail, there is a problem that the machined surface is damaged, and the chip in the groove cannot be removed with a soft brush.
[0005]
[Problems to be solved by the invention]
As described above, the problem that the prior art apparatus cannot completely prevent the scattering of chips and the problem that it is difficult to remove chips remaining on the processing surface without damaging the processing surface. It was necessary to solve.
The present invention has been made in view of the above-described circumstances, and even when short and separated chips are generated during cutting processing, the generated chips are surely captured at the generating portion without being scattered and sucked by the dust collector. An object of the present invention is to provide a chip scattering prevention cover that can be collected.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, in order to achieve the above-described object, a cutting tool is fixedly installed on an upper surface of a cutting tool, suction-collects chips formed by cutting a workpiece by the cutting tool, and cuts the chips. A chip scattering prevention cover for preventing scattering of chips is provided at a chip passing portion for introducing chips generated at the tip of the cutting blade of the cutting tool into the cover, and at a horizontal cutting edge base of the cutting tool. An air suction port for sucking air. An outer surface of a tip of the cover facing the workpiece retreats in a direction opposite to the workpiece by a predetermined dimension (A) from a tip of the cutting blade of the cutting tool; A predetermined dimension (B) is provided between the end face of the cover and the cutting blade tip face of the cutting tool, and a suction unit provided on the opposite side of the tip of the cover to suck chips inside the cover is provided. The chip scattering prevention cover is further provided.
[0007]
With this configuration, the generated chips can be surely captured by the generating section without being scattered, and can be suction-collected by the dust collector. In addition, the processing steps for the chips that have been required to be scattered or adhered to the workpiece, which have been conventionally required, can be reduced.
[0008]
According to a second aspect of the present invention, in the first aspect, the predetermined dimension (A) is 0.3 ± 0.1 mm.
[0009]
According to a third aspect of the present invention, in any one of the first and second aspects, the predetermined dimension (B) is 0.3 ± 0.1 mm.
[0010]
The above-described second and third embodiments disclose embodiments that further embody the present invention.
[0011]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the tip angle (β) of the cover is larger than the tip angle (α) of the cutting tool. It is characterized by.
[0012]
According to this embodiment, since the air suction port having a dimension necessary for air suction can be provided without being hindered by the cutting tool, chips can be more effectively captured.
[0013]
According to a fifth aspect of the present invention, in the fourth aspect, the tip angle of the cover is larger than the cutting edge angle of the cutting tool by about 20 degrees.
According to a fifth aspect of the present invention, a preferable mode for embodying the present invention is disclosed in the fourth aspect.
[0014]
According to a sixth aspect of the present invention, in the fourth aspect, the tip angle of the cover is substantially 20 degrees larger than the tip angle of the cutting blade of the cutting tool.
According to a sixth aspect of the present invention, a preferable mode for further embodying the present invention is disclosed in the fourth aspect.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a chip scattering prevention cover according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 3 schematically show one embodiment of a chip scattering prevention cover according to the present invention.
Referring now to the drawings, and more particularly to FIGS. 1 to 3, the elements of FIGS. 1 to 3 that are the same as or similar to the elements of the embodiment of the prior art chip shatterproof device 20 shown in FIG. Parts are designated by the same reference numerals.
[0016]
First, referring to FIG. 1, there is shown a side view of a chip scattering prevention cover 10 according to an embodiment of the present invention, showing a state where a workpiece 11 such as a commutator is cut by a cutting tool 2. ing. The cutting tool 2 has a tip 5 having a cutting edge at the tip, and the cutting edge of the cutting tool 2 is in contact with the workpiece 11. Since the main body 1 of the chip scattering prevention cover 10 is placed on and integrated with the upper surface of the cutting tool 2 so as to be in contact therewith, there is no gap between those contacting portions. The side cross section of the cutting blade tip of the cutting tool 2 is an acute angle, the cutting blade tip surface 12 of the cutting tool 2 is inclined, and the bottom of the cutting tool 2 of the main body 1 on the tip side faces the cutting blade tip surface 12. And are formed substantially in parallel. The tip of the cutting blade of the cutting tool 2 projects from the tip outer surface 8 of the main body 1 by a predetermined amount toward the workpiece 11.
[0017]
Referring to FIG. 2, FIG. 2 is a cross-sectional side view of FIG. 1, and further illustrates a state where the workpiece 11 is cut by the cutting tool 2 to generate chips. The body 1 has a chip passing portion 3 provided at a tip thereof and through which chips pass, and a suction portion 7 provided on a side opposite to the tip of the body 1 and connected to a dust collector (not shown). Is provided. Further, an air suction port 4 for sucking air into the main body 1 is provided on the bottom end side (end surface 9 side) of the main body 1, which is a view seen from the direction C in FIG. Is shown in
[0018]
Further, the operation of the chip scattering prevention cover 10 of the present embodiment will be described, and the configuration thereof will be further described.
First, the cutting tool 2 and the main body 1 are integrated with the cutting edge of the cutting tool 2 projecting a predetermined amount, and then the cutting tool 2 is fixed to a tool base of the machine tool. To the dust collector. Next, when the dust collector is operated and the workpiece is cut with the tip of the cutting blade of the cutting tool 2 in a state where the chip is being sucked, the chips generated at the tip of the cutting blade become the rake face of the cutting tool 2. , And is guided into the main body 1 through the chip passing portion 3 provided in the main body 1, and the chips are separated in this state, and jump in the main body 1 by the elastic force. Since there is no gap between the main body 1 and the cutting tool 2 except for the chip passing portion 3 and the air suction port 4, the chips are restrained in the main body 1 and collected in the dust collector by suction of the dust collector.
Further, since the air suction port 4 is provided so as to open toward the cutting tool 2 at the horizontal cutting edge base 6 of the cutting tool 2, the chips are separated from the workpiece 11 and have elasticity. Spaces are not opened in various directions of flying by force, and chips can be reliably restrained in the main body 1 and collected by the dust collector.
[0019]
Referring to FIG. 2, in the present embodiment, preferably, the dimension (B) between end face 9 of main body 1 and tip end face 12 of cutting tool 2 is 0.3 ± 0.1 mm, and By setting the dimension (A) between the tip outer surface 8 of the main body 1 and the tip of the cutting tool cutting edge to 0.3 ± 0.1 mm, the rake face generated by the cutting edge in the finish cutting of the surface of the commutator or the like. Is surely guided into the main body 1 through the chip passage portion 3.
Also, the tip angle (β) of the cover is made larger than the tip angle (α) of the cutting blade of the cutting tool 2, and preferably, the increased angle (β−α) is made about 20 degrees or more, more preferably about 20 degrees or more. By setting the degree, the air suction port 4 having a size necessary for suction can be provided at the horizontal cutting edge base portions 6 on both sides of the cutting tool 2 without disturbing the cutting operation or the cutting position adjustment. become.
[0020]
Next, effects and operations of the above embodiment will be described.
The following effects can be expected from the chip scattering prevention cover according to the embodiment of the present invention.
・ The generated chips can be reliably captured at the generating part without scattering.
・ Furthermore, the chips can be reliably collected by suctioning with a dust collector.
・ A chip scattering prevention cover can be easily attached to the cutting tool.
-It is possible to reduce the number of processing steps for the chips that have been required to be scattered or adhered to the workpiece, which has been conventionally required.
[0021]
The above embodiment is an example of the present invention, and the present invention is not limited by the embodiment, but is defined only by matters described in the claims. It is feasible.
In the embodiment of the present invention, the method of attaching the chip scattering prevention cover may be a fixed method using brazing, an adhesive, or the like, and may be a detachable method using a bolt or a clamp separately from this. There may be.
The shape of the scattering prevention cover may be various shapes such as a triangle, a quadrangle, a pentagon, and a hexagon.
Further, the material of the scattering prevention cover may be any suitable metal such as metal such as steel or aluminum, or plastic.
[Brief description of the drawings]
FIG. 1 is a side view of a chip scattering prevention cover according to an embodiment of the present invention, showing a state where a workpiece such as a commutator is cut by a cutting tool. .
FIG. 2 is a cross-sectional view of FIG. 1, showing a state in which a workpiece is cut by a cutting tool to generate chips.
FIG. 3 is a diagram viewed from a direction C in FIG. 1;
FIG. 4 is a side view of a chip scattering prevention device cover according to an embodiment of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Cutting tool 3 ... Chip passage part 4 ... Air suction port 5 ... Chip 6 ... Horizontal cutting blade base part 7 ... Suction part 8 ... Tip outer surface 9 ... End face 10 ... Chip scattering prevention cover 11 ... Work Object 12: Tip of cutting edge

Claims (6)

This chip scattering prevention cover, which is fixedly installed on the upper surface of the cutting tool, suctions and collects the chips formed by cutting the workpiece by the cutting tool and prevents the chips from scattering. The cover
A chip passing portion for introducing chips generated at the tip end of the cutting tool into the cover,
An air suction port for sucking air at the horizontal cutting edge base portion of the cutting tool,
An outer surface of a tip of the cover facing the workpiece retreats in a direction opposite to the workpiece by a predetermined dimension (A) from a tip of the cutting blade of the cutting tool;
A predetermined dimension (B) is provided between an end face of the cover facing the cutting tool and a cutting edge end face of the cutting tool;
A chip scattering prevention cover, comprising: a suction unit provided on a side opposite to a tip end of the cover to suction chips in the cover. 2. The chip scattering prevention cover according to claim 1, wherein said predetermined dimension (A) is 0.3 ± 0.1 mm. The chip scattering prevention cover according to claim 1, wherein the predetermined dimension (B) is 0.3 ± 0.1 mm. The chip scattering prevention cover according to any one of claims 1 to 3, wherein the tip angle (β) of the cover is larger than the tip angle (α) of the cutting tool. The chip scattering prevention cover according to claim 4, wherein a tip angle of the cover is larger than about 20 degrees as compared with a cutting edge angle of the cutting tool. The apparatus according to claim 4, wherein a tip angle of the cover is approximately 20 degrees larger than a cutting edge angle of the cutting tool.

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