JP4084921B2 - Chip removal device for broaching machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chip removal device for a vertical broaching machine, and more particularly to a chip removal device suitable for drive roach processing that does not use cutting oil and mist drive roach processing using mist-like cutting oil.
[0002]
[Prior art]
In conventional broaching, cutting oil is supplied from a plurality of nozzles provided around the broach to the broach, and chips at the time of cutting are poured out by the cutting oil and flow downward, and then installed below the broach. The chip conveyor was installed in the lower part of the frame, and chips dropped from the upper part were carried out of the apparatus. In particular, in this prior art, a cutting oil is required, and a processing device that collects chips containing the cutting oil and renders the cutting oil harmless is also necessary. However, improvement in workability was demanded. Therefore, in recent years, drive roaching that does not use cutting oil or mist broaching that uses cutting oil in a mist form is known.
[0003]
As this type of technology, for example, a technology disclosed in Japanese Patent Application Laid-Open No. 2000-117531 is known. This is shown in FIG. 4 to explain the outline. On the table 7 of the broaching machine 1, a chip storage chamber 2 having an inner diameter about twice the maximum outer diameter of the broach 4 is provided, and on both sides of the chip storage chamber 2. A chip discharge hole 22 and an air supply hole 23 are provided, and a suction hose 11a connected to the suction side of a chip suction device (not shown) is connected to the chip discharge hole 22 and connected to the exhaust side. The hose 11 b is connected to the air supply hole 23. Thereby, when the workpiece W on the table 7 is processed by the broach 4, the chips adhering to the broach 4 are accommodated in the chip accommodating chamber 2 and discharged. In the figure, 8 is an oil mist supply nozzle.
[0004]
Thereby, it can collect | recover in a dry state, without scattering the chip produced at the time of cutting.
[0005]
[Problems to be solved by the invention]
In the above Japanese Patent Laid-Open No. 2000-117531, post-treatment of cutting oil containing chips is not required by dry processing or mist processing, and a chip storage chamber 2 is provided, and air is provided in the chip storage chamber. The supply and exhaust are performed to actively remove chips. However, the chips adhering to the cutting edge of the broach 4 cannot be recovered sufficiently and fall downward, and when processing is performed for a long time, the chips accumulate on the floor and are frequently cleaned. There was a problem that.
[0006]
That is, the broach 4 moves in the vertical direction in the figure and the workpiece W on the table 7 is processed, but moves downward with the chips firmly attached to the broach 4. Here, by injecting air from the side in the chip storage chamber 2 in the horizontal direction and further suctioning from the side, the chips are easily detached from the cutting edge of the broach 4 in the chip storage chamber 2. However, it may become stuck to the cutting edge of the broach 4 and may not be peeled off immediately, and the broach 4 moves further downward, and the chip is detached only after the chips move downward outside the chip storage chamber 2. Because there is. At this time, the chips can no longer be collected and scattered and accumulated on the floor, so that the frequency of cleaning work is increased.
[0007]
The present invention has been made paying attention to the above-described problems. Needless to say, post-treatment of cutting oil containing chips is not necessary, and chips are actively blown upward so that they are disposed below the table. An object of the present invention is to provide an apparatus that more effectively prevents scattering and accumulation on the floor, and keeps the lower part of the table always clean and does not require frequent cleaning.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a table having a through hole extending in the vertical direction of a vertical broaching machine and passing a driven broach and positioning and supporting a workpiece to be processed on the upper plate, and the table As a lower plate disposed at a lower position separated from the lower side and provided with a through hole for allowing the broach to pass therethrough, a chip containing chamber is formed between the two plates, and an annular space surrounding the broach after workpiece penetration processing is formed. A plurality of air blow nozzles are provided that are opened on the inner surface of the through hole of the lower plate that constitutes the bottom surface of the chamber and allows the broach to pass through with a gap, and that injects compressed air from the radially outer side toward the cutting edge of the broach. and, wherein each air blowing nozzle, the through hole upward after the compressed air injected is applied to the broach cutting edge of passing through the through-hole of the lower plate The set inclined at a predetermined angle upwardly relative to the axis perpendicular to a plane of the broach to flow into the chip accommodating chamber, the bottom surface constituting a bottom plate of said chip accommodating chamber, toward the through-hole through which the broach from the outer periphery It is formed in a substantially conical shape inclined upward by a predetermined angle .
[0010]
According to a second aspect of the invention, the chip accommodating chamber, characterized in that the suction means sucking and discharging chips of this該切scrap housing chamber is connected.
[0013]
【The invention's effect】
According to the first aspect of the present invention, the air blow nozzle is provided on the lower plate constituting the chip accommodating chamber, and allows the passage of the broach and allows the chip accommodating chamber to communicate with the lower external space. Since it is set so as to incline compressed air at a predetermined angle upward from the outer peripheral side in the radial direction toward the cutting edge of the broach passing through the through hole, the injected compressed air is injected into the broach. When hitting the cutting blade, it is raised from a narrow gap between the through hole and the outer periphery of the broach and introduced into the chip storage chamber, and the chips adhering to the cutting blade can be released and reliably blown upward. It is possible to efficiently prevent the chips from falling downward, which is the external space of the chip storage chamber, and to reliably collect the blown up chips in the chip storage chamber.
Moreover, the bottom surface formed by the lower plate of the chip storage chamber is formed in a substantially conical shape inclined upward by a predetermined angle from the outer peripheral side toward the through hole that penetrates the broach, so that the chip is moved to the outer peripheral side by its own weight. In addition, it is possible to prevent accumulation in the vicinity of the through-hole on the outer periphery of the broach, and the lower plate is along the direction of the air blow nozzle, so that the space of the lower plate can be reduced and the entire apparatus can be made compact.
[0015]
According to the invention described in claim 2, switching scrap storage chamber, since the suction means for discharging by suction the chip of this該切scrap housing chamber is connected, the lower plate through-hole and broach by the suction of the suction means from falling down through a gap between with can effectively prevent the Fukitoba been chips upward from the nozzle is via a chip accommodating chamber can be securely recovered.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to examples. In addition, the same code | symbol is provided to the code | symbol demonstrated with the prior art, and description is abbreviate | omitted.
[0019]
1-3 is a figure which shows preferable embodiment of the chip removal apparatus which concerns on this invention. With reference to FIG. 1, a reference block 15 is placed on the table 7 of the vertical broaching machine 1, and a workpiece W to be processed is positioned on the reference block 15. And the broach 4 which is a processing tool is inserted in this workpiece | work W. The broach 4 is erected on the base 14, and the base 14 is moved from above to below by a drive mechanism (not shown), so that the broach 4 moves in the vertical direction, and the work W is broached.
[0020]
Of the periphery of the broach 4 extending in the vertical direction of the vertical broaching machine 1, a portion located below the work W and below the table 7 is provided with a chip storage chamber 2. The chip storage chamber 2 includes a hollow cylindrical side plate 3 that surrounds the periphery of the broach 4 and a table 7 as an upper plate that closes the upper and lower sides of the side plate 3 and has through holes 7b and 5b through which the broach 4 passes. And a lower plate 5, and chips are accommodated in a space surrounded by the inner surface 3 a of the side plate 3, the lower surface 7 a of the table 7, and the upper surface 5 a of the lower plate 5.
[0021]
Here, the upper surface 5a of the lower plate 5 is formed in a substantially conical shape in which the upper surface 5a is inclined upward by a predetermined angle from the side plate 3 toward the through hole 5b. By this inclination, the chips in the chip storage chamber 2 are moved to the side plate 3 side by their own weight and do not accumulate in the vicinity of the through hole 5b of the lower plate 5 around the broach 4, and are in the direction of the air blow nozzle 12 described later. Therefore, both the function of the air blow nozzle 12 and the function of the lower plate 5 forming the chip storage chamber 2 can be satisfied in a small space, and the space of the entire apparatus can be reduced and the device can be made compact. Furthermore, since the air blow nozzle 12 is provided on the lower plate 5 constituting the chip accommodating chamber 2, the space of the lower plate 5 can be made smaller, and the entire apparatus can be made more compact.
[0022]
In this embodiment, in order to ensure that the chips 6 slide down to the side plate 3 side by weight efficiently, the angle α relative to the plane m2 (chain line) perpendicular to the axis l (chain line) of the broach 4 shown in FIG. Is set to 30 degrees. In addition, you may perform the coating which makes friction resistance small on the upper surface 5a of the lower board 5. FIG. In this embodiment, the angle α is 30 degrees. However, the present invention is not limited to this, and the angle α may be changed within an angle at which the chips 6 slide down.
[0023]
As shown in FIG. 2, a plurality of air blow nozzles 12 for injecting compressed air to the broach 4 are arranged on the lower plate 5. The injection direction of each air blow nozzle 12 is set to be inclined upward by a predetermined angle with respect to a plane m1 (chain line) perpendicular to the axis l of the broach 4. Each of the air blow nozzles 12 is on a plane m1 perpendicular to the axis l of the broach 4 and is arranged at equal intervals around the axis l (see FIG. 3), and is a plane perpendicular to the axis l. The angle β with respect to m1 is set to 45 degrees. Note that when the angle β is 10 degrees or less, the action of blowing the chips upward decreases and the amount falling downward increases. Conversely, when the angle β exceeds 45 degrees, the air flow does not sufficiently act on the cutting edge of the broach 4, and the chips The amount that falls down increases. Experiments have confirmed that if the angle β is in the range of 10 degrees to 45 degrees, the chips are blown upward without leaving any chips. The air blow nozzle 12 communicates with the air chamber 9 which is a ring-shaped space concentrically with the axis 1 of the broach 4 in the lower plate 5 and extends radially and 45 degrees upward toward the axis l. Further, it is an elongated, substantially linear space that is released above the gap 5b between the lower plate 5 and the broach 4. The air chamber 9 is supplied with pressurized air from a pressurized air source (not shown) through the hole 13.
[0024]
In this embodiment, the maximum diameter d of the cutting edge 4a of the broach 4 is 8 mm, and the inner diameter D of the lower plate 5 is 10 mm. That is, the inner circumference D of the lower plate 5 is 2 mm larger than the maximum diameter d of the broach 4. That is, the gap between the through hole 5b of the lower plate 5 and the cutting edge 4a of the broach 4 is 1 mm.
[0025]
As described above, since the injection direction from each air blow nozzle 12 is set to be inclined upward by a predetermined angle with respect to the plane m1 perpendicular to the axis l of the broach 4, the chips 6 adhered to the cutting edge of the broach 4 are removed. It can be reliably blown upward, and can be efficiently prevented from falling downward, keeping the device clean, providing a large chip cleaning device and cutting oil treatment device, or frequent operators There is no need for cleaning. In addition, the air blow nozzles 12 are arranged at equal intervals around the axis of the broach 4 and are set so as to be inclined in the range of 10 to 45 degrees above the plane perpendicular to the axis of the broach 4, so that they adhere to the cutting edge of the broach. It is possible to blow away the chips that are turned upward more reliably.
[0026]
As shown in FIG. 1, a chip discharge hole 22 is formed in the side plate 3, and the chip discharge hole 22 is connected to the chip suction device 10 through the hose 11, and the chip suction device 10 is not shown. Negative pressure from the suction pump acts in the chip storage chamber 2 via the hose 11 and the chip discharge hole 22, whereby the chips are stored in the chip suction device 10. In addition, when a predetermined amount of chips accumulates in the chip suction device 10, it may be detected by a sensor (not shown) and displayed with a display lamp or the like to prompt the operator to discharge. In addition, if the caster 16 is provided in the chip suction device 10 so as to be movable on the floor 17, chips can be easily discharged. At the time of discharging the chips, since it is not a process of flowing a cutting oil by a drive roach process, a troublesome processing of the cutting oil is unnecessary.
[0027]
Further, a chip storage chamber 2 surrounding the broach 4 is provided between the workpiece W and each air blow nozzle 12, and suction means for sucking and discharging the chip 6 in the chip storage chamber 2 in the chip storage chamber 2. Since the chip suction device 10 is connected, the chip 6 adhered to the cutting edge of the broach 4 can be reliably blown upward and can be efficiently prevented from falling downward. At the same time, chips can be reliably recovered in the vicinity of the processing position.
[0028]
Furthermore, the chip storage chamber 2 includes a side plate 3 that surrounds the periphery of the broach 4, a table 7 as an upper plate that closes the upper and lower sides of the side plate 3, and has through holes 7 b and 5 b through which the broach 4 passes. Since a gap is formed between the outer periphery of the broach 4 in the through hole 5b of the lower plate 5 and air is blown upward into the gap, the cutting edge 4a of the broach 4 is agglomerated. The worn chips 6 can be reliably blown upward and can be efficiently prevented from falling downward, and the chips can be reliably recovered in the vicinity of the processing position.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a preferred embodiment of a chip removing device according to the present invention. FIG. 2 is an explanatory view for explaining a main part of FIG.
FIG. 3 is an explanatory diagram for explaining the main part of FIG. 2 in a plan view.
FIG. 4 is an explanatory view showing an example of a conventional chip removing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Broaching machine 2 ... Chip storage chamber 3 ... Side plate 4 ... Broach 4a ... Cutting edge 5 ... Lower plate 7 ... Table (upper plate)
DESCRIPTION OF SYMBOLS 10 ... Chip suction device 12 ... Air blow nozzle 13 ... Pressure air supply part W ... Workpiece

Claims (2)

A table that has a through hole that extends in the vertical direction of the vertical broaching machine and passes a driven broach and that supports positioning of the workpiece to be processed on the upper plate is disposed at a lower position separated from the table. As a lower plate provided with a through hole that allows the broach to pass therethrough, a chip containing chamber consisting of an annular space surrounding the broach after workpiece penetration processing is formed between both plates,
A plurality of air blows that are opened on the inner surface of the through hole of the lower plate that constitutes the bottom surface of the chip accommodating chamber and that allows the broach to pass therethrough and inject compressed air from the radially outer side toward the cutting edge of the broach. Place the nozzle,
Each of the air blow nozzles is formed on a plane perpendicular to the axis of the broach so that the injected compressed air flows into the chip accommodating chamber above the through hole after acting on the cutting edge of the broach passing through the through hole of the lower plate. Set it by tilting upward by a predetermined angle ,
The bottom removing surface formed by the lower plate of the chip accommodating chamber is formed in a substantially conical shape inclined upward by a predetermined angle toward a through hole through which the broach penetrates from the outer peripheral side. .   2. The chip removing device for a broaching machine according to claim 1, wherein the chip storage chamber is connected to suction means for sucking and discharging chips in the chip storage chamber.

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