JP2009248200A - Auxiliary device for machine tool and method of removing chip using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for removing chips from all working areas such as cutting surfaces, holes, particularly, screw holes without using a drive source separated from a machine tool. <P>SOLUTION: This auxiliary device attached to the rotating shaft of the machine tool for removing chips from a workpiece which is machined by the machine tool comprises a shank which is so disposed that the axis thereof is aligned with the axis of the rotating shaft and one end of which is attached to the rotating shaft rotated together with the rotating shaft; a blade assembly joined integrally to the shank and generating an air flow in the direction generally matching the direction of the shank from one end to the other when the shank is rotated; and a nozzle joined to the blade assembly for restricting the air flow. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for forcibly removing machining waste generated in machining such as cutting, drilling, and tapping using a machine tool from a machining area such as a cutting surface, a hole, and a screw hole of a workpiece, and More particularly, the present invention relates to a method and an apparatus for forcibly removing machining waste generated by machining a precision part from a machining area.

  Conventionally, there is an instrument in which a flexible strip-like piece obtained by cutting a vinyl chloride sheet on a shank is attached (for example, see Non-Patent Document 1). According to this instrument, the strip can be rotated around the shank by attaching the shank to the rotating shaft of the machine tool and operating the machine tool. By the action of the strips rotating around the shank, the machining waste can be removed from the workpiece after machining.

Daishowa Seiki Co., Ltd. (Higashi-Osaka City) Published in 1998 Catalog No.130-V5-0605-1S, Peripheral Equipment Cleantech, page 257

  However, the above-described prior art does not remove the machining waste from the individual cutting surfaces or screw holes subjected to the machining of the workpiece, and is not suitable for such removal. This is because the machining scraps remaining on the surface of the workpiece can be swept away by the rotation of the strips, but the machining scraps in the holes and screw holes cannot be swept away. In other words, the above-described conventional technique is only effective for removing processing waste from a specific workpiece that has been subjected to surface processing such as cutting or polishing.

  For example, machining scraps generated when a screw hole having an inner diameter of about 5 mm or less is formed in a metal part for manufacturing a precision product may remain in the screw hole. In this case, if a screw is screwed with a predetermined torque into a screw hole in which this machining waste remains for joining other parts, the parts are not completely joined by the screw, which may cause a serious accident later. is there. In order to eliminate such a fear, it is necessary to remove all the processing waste from all the processed screw holes.

  The processing waste remaining in the screw hole can be blown off from the screw hole by blowing compressed air from a compressed air source such as a compressor toward the screw hole. However, in this case, a compressed air source separate from the machine tool is required.

  Accordingly, an object of the present invention is to provide a method and apparatus for removing machining waste from all machining areas such as cutting surfaces and holes, particularly screw holes, without using a drive source different from a machine tool. is there.

  The present invention pays attention to the rotational speed of the rotating shaft of today's machine tools whose rotational speed is increased to 20,000 to 3,000 rpm, and generates an air flow using the high-speed rotation of the rotating shaft. This is based on the concept of removing machining debris from all machining areas including screw holes without using a special air source such as a compressor.

  That is, the auxiliary tool according to the present invention is an auxiliary tool that is attached to the rotary shaft of the machine tool in order to remove machining waste from a workpiece that is processed by the machine tool, and the axis is mutually connected to the rotary shaft. A shank that is arranged in a unity and is rotatably attached integrally to the rotating shaft, one end of which is attached to the rotating shaft, and is integrally coupled to the shank, and the one end of the shank is entirely connected with the rotation of the shank. A vane assembly for generating an air flow in a direction substantially coincident with the direction from the other end to the other end, and a nozzle coupled to the vane assembly for constricting the air flow.

  In the auxiliary tool of the present invention, the shank is attached to the rotary shaft at the one end so that the axis coincides with the rotary shaft of the machine tool. When the auxiliary shaft is rotated at a high speed such as 20,000 to 3,000 rpm by the operation of the machine tool with the auxiliary tool attached to the machine tool, the auxiliary tool is connected to the rotary shaft. It rotates as a whole around the axis. When the blade assembly is rotated by the rotation of this auxiliary tool, the blade assembly takes in air around the outside and generates an air flow in a direction substantially coincident with the direction from one end to the other end of the shank. To do. The nozzle narrows this air flow toward the work area of the workpiece. As a result, an air flow sufficient to blow away the processing waste remaining in the processing area is supplied from the nozzle to the processing area.

  Therefore, according to the auxiliary tool of the present invention, by directing the air flow from the nozzle to the machining area, the machining area has a relatively large depth dimension, such as a screw hole, and machining waste. Even if the shape is easy to get entangled, the power of the machine tool used to form the machining area is used to reliably remove it from the machining area without using a special pressurized air source such as a compressor. It becomes possible.

  The blade assembly may include a shaft portion extending in the extending direction along the axis of the shank from the other end of the shank, and a blade portion formed on the shaft portion. The blade portion can gradually reduce the outer diameter across the shaft portion toward the tip portion of the shaft portion, and the nozzle is coupled to the tip portion of the shaft portion.

  The nozzle has an inverted cone-shaped hood portion that gradually decreases the diameter in accordance with a gradual decrease in the outer diameter of the blade portion so as to receive at least one half of the blade portion, and an extension portion that extends from the small-diameter opening of the hood. A nozzle opening is formed at the tip of the extension.

  A cover that covers the large-diameter end of the blade portion can be attached to the other end of the shank. In this case, the space between the cover and the edge of the large-diameter mouth of the hood portion acts as an air intake.

  A screw part may be formed at the tip of the shaft part, and a partition wall that crosses the diameter of the hood and that has a screw hole that engages with the thread part may be provided in the hood part of the nozzle. In this case, the blade assembly and the nozzle can be coupled to each other by screwing of the screw hole of the shaft portion and the screw hole formed in the partition wall.

  The shank of the auxiliary tool can be detachably attached to the rotating shaft of the machine tool through a tool holder, if necessary.

  The processing waste removal method according to the present invention is a processing waste removal method using the auxiliary tool. That is, in the removal method according to the present invention, the machine tool is operated, and the machining waste generated when the workpiece is machined using the tool removably attached to the rotating shaft of the machine tool is formed by the tool. A method for removing machining scraps to be removed from a machined machining area, wherein the tool is attached to the rotary shaft, and a workpiece is machined using the tool, and the tool is machined after machining using the tool. Step 2 for removing from the rotating shaft and an auxiliary tool for removing the processing waste, the rotating shaft being arranged so that the axes thereof coincide with each other, and one end of the rotating shaft can be rotated integrally with the rotating shaft. A shank attached to the rotating shaft and integrally coupled to the shank, and for generating an air flow in a direction substantially coincident with the direction of the shank from the one end to the other end as the shank rotates. Attaching an auxiliary tool to the rotating shaft including a root assembly and a nozzle coupled to the blade assembly for narrowing the air flow, and operating the machine tool to rotate the rotating shaft. Each step of directing the resulting air flow from the nozzle to the processing zone.

  According to the method of the present invention, the tool is removed from the machine tool in step 2 even if machining waste remains in the machining area formed in the workpiece by machining using the tool in step 1. After that, in step 3, the auxiliary tool according to the present invention is attached to the machine tool, and then in step 4, the machine tool is operated, and the air flow from the nozzle is directed to the machining area. Even if this processing area has a shape in which the processing scraps such as screw holes are easily entangled with the remaining processing scraps, as described above, it can be suitably removed using the auxiliary tool.

  A step 5 of removing the auxiliary tool attached to the rotating shaft after the operation of the machine tool is stopped can be added.

  By sequentially repeating the additional step 5 from the step 1 every time a new machining area is formed, it is possible to sequentially remove the remaining machining waste from the new machining area every time the machining area is formed.

  Instead, in the step 1, a plurality of machining areas are formed by machining the workpiece using the tool, and then the auxiliary tool obtained by executing the steps 2, 3 and 4 is used. By the injection of the air flow, the processing scraps in all the processing areas can be removed collectively.

  In any of these methods, for example, the auxiliary tool and the plurality of tools are accommodated in a magazine of a machining center, and the machine tool automatically executes the steps under a computer program of a central processing unit. Can do. By this automatic processing, it is possible to efficiently process the workpiece and clean the processing area.

  According to the auxiliary tool of the present invention and the machining waste removal method using the auxiliary tool, as described above, the power of the machine tool used for forming the machining area can be used, and this makes it possible to perform special processing such as a compressor. Without using a pressurized air source, it is possible to reliably remove the machining waste from various forms of the machining area including the machining area where the machining waste such as a screw hole is likely to remain.

  The auxiliary tool 10 according to the present invention is used by being attached to a rotating shaft 12 of a machine tool, as shown in FIG. This machine tool is typically a processing machine such as a milling machine, a drilling machine, a lathe, or a polishing machine, and an auxiliary tool 10 is attached to a rotary shaft 12 of the processing machine.

  The rotating shaft 12 is formed with a mounting hole 12a opened at one end thereof. As is well known in the art, the mounting hole 12a gradually increases in diameter linearly toward its open end. The auxiliary tool 10 has a linear shank 14 having an outer shape corresponding to the mounting hole 12a of the rotating shaft 12, an impeller assembly 16 provided at the other end of the shank, and the auxiliary tool 10 attached to the impeller. Provided nozzle 18.

  The impeller assembly 16 includes a shaft portion 16a and a blade portion 16b that is formed integrally with the shaft portion and includes a plurality of blades that protrude outward from the outer peripheral surface of the shaft portion 16a. In the illustrated example, the impeller assembly 16 is an axial flow type impeller assembly, and in order to generate an air flow along the shaft portion with the rotation of the shaft portion 16a, the impeller assembly 16 of the blade portion 16b. Each blade is twisted along the shaft portion 16a. Further, both the shaft portion 16a and the blade portion 16b gradually decrease the outer diameter in the direction of the air flow.

  The other end of the shank 14 is provided with a screw hole 14a that opens to the end. A screw portion 20 that can be screwed into the screw hole 14a is provided at one end of the shaft portion 16a of the impeller assembly 16, that is, the end portion on the large diameter portion side of the blade portion 16b. Therefore, the screw portion 20 of the blade portion 16b is screwed into the screw hole 14a of the shank 14 and tightened so that both the axes of the shank 14 and the shaft portion 16a of the impeller assembly 16 are aligned and integrally coupled. can do.

  In the example shown in FIG. 1, a cover 22 that covers the end of the blade is sandwiched between the other end of the shank 14 and the blade 16 b. The cover 22 extends between the cylindrical portion 22a sandwiched between the shank 14 and the large-diameter end of the blade portion 16b, and radially outward from one end of the cylindrical portion along the large-diameter end of the blade portion 16b. And a flange portion 22b. A lower edge portion 22c that covers the outer edge of the large-diameter end of the blade portion 16b is provided on the outer edge of the flange portion 22b.

  A threaded portion 24 for attaching the nozzle 18 is formed at the other end, that is, the tip end of the shaft portion 16a of the impeller assembly 16. As shown in FIGS. 1 and 2, the nozzle 18 includes a circular support wall 18a in which a screw hole 26 into which the screw portion 24 is screwed is provided, and a whole formed integrally with the support wall. Are provided with an inverted conical hood portion 18b and an extension portion 18c having a uniform diameter extending from the small diameter opening of the hood, and the extension portion is returned to the nozzle port 18d.

  The hood portion 18b extends along the outer edge of the blade portion 16b toward the lower edge portion 22c of the cover 22 so as to cover one half of the small diameter portion side of the blade portion 16b on the side facing the cover 22 of the support wall 18a. A gap 27 is formed between the lower edge portion 22c of the cover 22 and the edge portion of the large-diameter mouth of the hood portion 18b opposite thereto. Further, the hood portion 18b extends to the extension portion so as to gradually reduce the diameter toward the extension portion 18c on the opposite side of the support wall 18a. In the support wall 18a, a plurality of air passages 28 penetrating the support wall are provided at intervals in the circumferential direction of the support wall 18a.

  By screwing the screw hole 14a of the shank 14 and the screw part 20 of the impeller assembly 16 and screwing the screw hole 26 formed in the support wall 18a of the nozzle 18 and the screw part 24 of the impeller assembly 16, As shown in FIG. 1, the shank 14, the impeller assembly 16, and the nozzle 18 are fixedly coupled to each other with their axes aligned.

  The auxiliary tool 10 has a shank 14 in the mounting hole 12a of the rotary shaft 12 of the machine tool, as in a well-known tool holder used when mounting a tool such as a drill blade to the rotary shaft 12. It is attached to the rotating shaft 12 so as to be fitted and thereby rotate integrally with the rotating shaft 12.

  When the machine tool is driven with the auxiliary tool 10 attached to the rotating shaft 12, and the rotating shaft 12 rotates thereby, the auxiliary tool 10 is rotated around the axis integrally with the rotation of the rotating shaft. . For example, when the rotary shaft 12 is rotated at a rotational speed of 20,000 to 3,000 rpm, the auxiliary tool 10 rotates integrally with the rotary shaft 12. When the impeller assembly 16 is rotated by the rotation of the auxiliary tool 10, the surrounding air is moved on the lower edge portion 22 c of the cover 22 and the hood portion 18 b of the nozzle 18 facing the cover 22 by the rotating action of the blade portion 16 b. The air is sucked toward the impeller assembly 16 from the air intake 27 formed between the edges. The air sucked into the impeller assembly 16 is an air passage 28 provided in the support wall 18a of the nozzle 18 as a pressurized air flow in a direction coinciding with the direction from the one end to the other end of the shank 14. And it is directed to the nozzle opening 18d through the extension 18c. At this time, the air flow is jetted as pressurized air from the nozzle port 18d in a further pressurized state by receiving the air throttling action of the hood portion 18b.

  Therefore, when machining scraps such as shavings remain in the drilling, which is a machining area, when the workpiece (not shown) is drilled with a tool such as a drill blade previously attached to the rotary shaft 12, the tool Can be reliably blown away from the machining area by a pressurized air flow from the nozzle port 18d obtained by driving the rotary shaft 12.

  A gap can be provided between the inner wall of the hood portion 18b of the impeller assembly 16 and the outer edge of the small-diameter end portion of the blade portion 16b covered by the hood portion. However, in order to improve the air suction efficiency by the impeller assembly 16, it is desirable to bring them into close contact without providing a gap between the outer edge of the blade portion 16b and the inner wall of the hood portion 18b covering the outer edge.

  Although the cover 22 can be dispensed with, it is desirable to provide the cover 22 in order to prevent the diffusion of the intake air and increase the suction efficiency.

  Hereinafter, a specific procedure for cleaning the processing area of the workpiece using the auxiliary tool 10 according to the present invention will be described with reference to the flowchart of FIG. 3. This procedure can be performed manually. However, it is desirable to automatically control the operation of the machine tool and the operation of the robot for handling the tool and the auxiliary tool 10 under the computer program of the central processing unit by a conventionally well-known automatic control technique. Hereinafter, the procedure of the present invention will be described along with an example of automatic control.

  A tool for machining a workpiece using a machine tool is attached to the rotary shaft 12 of the machine tool, and the workpiece is machined by the rotation of the tool accompanying the drive rotation of the rotary shaft. (Step S1). As an example of processing using this tool, for example, an example in which one drill hole is drilled using one drill blade can be given. In some cases, machining holes may remain in the perforation, that is, in the processing area of the workpiece. In order to remove the machining waste, the tool is first removed from the rotary shaft 12 (step S2). Next, the auxiliary tool 10 is attached to the rotating shaft 12 instead of the tool (step S3). In attaching the auxiliary tool 10 to the rotating shaft 12, the shank 14 of the auxiliary tool 10 is fitted into the mounting hole 12 a of the rotating shaft 12 as described above.

  By rotating the rotary shaft 12 by driving the machine tool with the auxiliary tool 10 attached to the rotary shaft 12, a pressurized air flow is ejected from the nozzle port 18d of the auxiliary tool 10. In order to blow off the machining waste from the machining area by this pressurized air flow, the rotary shaft 12 of the machine tool is moved toward the machining area to be cleaned, and the nozzle port 18d of the nozzle 18 attached to the rotary shaft. Is arranged in the vicinity of the processing area (step S4). Either the start of the drive rotation of the rotary shaft 12 and the start of the movement toward the machining area may be before or after, or may be simultaneous. It is desirable that the rotary shaft 12 is driven to rotate when the nozzle port 18d moves to the optimum position for blowing away the processing waste in the processing area, or just before that.

  The pressurized air flow ejected from the nozzle port 18d of the nozzle 18 surely penetrates to the bottom of the machining area, even in a machining area such as a screw hole where machining scraps are easily entangled. Blow away from the area.

  When the cleaning of the processing area by the injection of the pressurized air flow from the nozzle port 18d is finished, the auxiliary tool 10 is once removed from the rotating shaft 12 (step S5). Thereafter, in step S6, it is determined whether or not it is necessary to further process the workpiece using the tool or another tool. If it is determined in step S6 that no other processing is necessary, the series of operations ends. On the other hand, if it is determined in step S6 that another process is necessary, the process returns to step S1 and steps S1 to S6 are repeated as necessary.

  In step S <b> 1, when a type of processing different from the previous processing is required, another tool suitable for processing different from the processing by the previous tool is attached to the rotary shaft 12. Further, when the same processing as the previous processing of the workpiece is performed on another part, the same tool used for the previous processing is selected, and the other part is subjected to the same processing using the tool. .

  In any case, according to the above-described procedure, every time a new machining is performed on the workpiece or a new machining area is formed, the machining area is sequentially used by using the auxiliary tool 10. Cleaning is performed.

  Instead of this example, for example, in step S1, a plurality of portions of the workpiece can be processed using a single tool. Further, in step S1, a plurality of tools for different types of processing can be used to perform different processing at a plurality of locations, and in this case, the plurality of tools are sequentially selected according to the processing content. According to these procedures, instead of the above-described sequential cleaning with the auxiliary tool 10, a single or a plurality of processing areas can be collectively cleaned after a plurality of processing operations.

  In the automatic control described above, it is desirable that the auxiliary tool and the plurality of tools are accommodated in a magazine of a machining center, and the necessary tools and auxiliary tools can be selectively used from the magazine.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. As described above, an example in which the auxiliary tool is directly attached to the rotating shaft of the machine tool has been described. However, for example, the auxiliary tool can be attached to the rotating shaft via a tool holder as necessary. In addition, although an axial flow type impeller is shown as an impeller assembly, various types such as a centrifugal impeller such as a multi-blade sirocco fan or a mixed flow type impeller between an axial flow type and a centrifugal type are shown. An impeller assembly having a plurality of impellers can be used.

It is a front view which fractures | ruptures and shows the auxiliary tool which concerns on this invention partially. It is sectional drawing obtained along the II-II line | wire shown in FIG. 3 is a flowchart illustrating the method of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Auxiliary tool 12 Rotating shaft 14 Shank 16 Impeller assembly 16a Shaft portion 16b Blade portion 18 Nozzle 18a Support wall 18b Hood portion 18c Extension portion
27 Air intake

Claims (11)

An auxiliary tool attached to the rotating shaft of the machine tool to remove machining waste from a workpiece to be processed by the machine tool,
A shank that is disposed so that its axis is aligned with the rotating shaft, and that is rotatable integrally with the rotating shaft, one end of which is attached to the rotating shaft, and is integrally coupled to the shank, and with the rotation of the shank A blade assembly for generating an air flow in a direction substantially coincident with a direction from the one end to the other end of the shank, and a nozzle coupled to the blade assembly for narrowing the air flow. Including assistive devices.   The blade assembly includes a shaft portion extending from the other end of the shank in the extending direction along the axis of the shank, and a blade portion formed on the shaft portion, and the blade portion is the shaft portion. The auxiliary tool according to claim 1, wherein an outer diameter that crosses the shaft portion is gradually reduced toward a tip portion of the shaft portion, and the nozzle is coupled to the tip portion of the shaft portion.   The nozzle has an inverted cone-shaped hood portion that gradually decreases the diameter in accordance with a gradual decrease in the outer diameter of the blade portion so as to receive at least one half of the blade portion, and an extension portion that extends from the small-diameter opening of the hood. The auxiliary tool according to claim 2, wherein a nozzle port is formed at a tip of the extension.   The other end of the shank is attached with a cover that covers the large-diameter end of the blade portion, and the space between the cover and the edge of the large-diameter opening of the hood portion acts as an air intake. 3. Auxiliary device according to 3.   A screw portion is formed at a tip portion of the shaft portion, and a partition wall that crosses the diameter of the hood and that has a screw hole that engages with the screw portion is provided in the hood portion of the nozzle. The assisting tool according to claim 3, wherein the blade assembly and the nozzle are coupled by screwing of the screw hole formed in the thread portion of the shaft portion and the partition wall.   The auxiliary tool according to claim 1, wherein the shank is detachably attached to a rotating shaft of the machine tool via a tool holder. Removal of machining waste that removes machining waste generated when a machine tool is operated and a workpiece is machined using a tool that is removably attached to the rotating shaft of the machine tool from the machining area formed by the tool. A method,
Attaching the tool to the rotating shaft and machining the workpiece using the tool; and
Removing the tool from the rotating shaft after machining with the tool; and
An auxiliary tool for removing the machining waste, the shank being arranged so that the axis of the rotating shaft coincides with the rotating shaft, and having one end attached to the rotating shaft so as to be rotatable integrally with the rotating shaft; A vane assembly integrally coupled to the shank for generating an air flow in a direction generally coincident with the direction from the one end of the shank to the other end as the shank rotates; Attaching an auxiliary tool to the rotary shaft, the auxiliary tool including a nozzle coupled to a three-dimensional body and narrowing the air flow;
And a step 4 for directing an air flow from the nozzle generated by the rotation of the rotating shaft by operating the machine tool to the processing area.   The removal method according to claim 7, further comprising a step 5 of removing the auxiliary tool attached to the rotating shaft after the operation of the machine tool is stopped.   The removal method according to claim 8, wherein the steps 1 to 5 are sequentially repeated every time a new processing area is formed.   In the step 1, a plurality of machining areas are formed by machining the workpiece using the tool, and then the air flow using the auxiliary tool obtained by the execution of the steps 2, 3 and 4 is performed. The removal method of Claim 7 which removes the processing waste of all the said process areas collectively by injection.   The removal method according to claim 7, wherein the auxiliary tool and the plurality of tools are accommodated in a magazine of a machining center, and the machine tool automatically executes the step under a computer program of a central processing unit.

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