KR100665734B1 - Rounding and chamfering device using air tool - Google Patents

Abstract

A chamfering device using an air tool is provided to prevent dust generated during chamfering from being introduced into a driving unit by the vortex flow of air formed by the left twist groove of a rotation shaft. An air tool body(2) has a front end with a head portion(3) and a rear end with a hose connector(4). A rotation shaft(5) having a lower portion with a through hole(5a) is vertically arranged in the head portion. A rotation mount coupling member(6) is screw-coupled to an inner lower end of the head portion of the air tool body. The rotation mount coupling member has a top surface with a rotation shaft insertion hole(6a), an outer surface with a screw portion(6b), and an outer lower end with four height adjustment grooves(6c). A rotation mount(7) is screw-coupled to a lower portion of the rotation mount coupling member. The rotation mount has a top surface with a screw hole(7a), an upper outer surface with a bolt coupling groove(7b) for coupling with a height adjustment bolt(9), and a bottom center where a support guide plate coupling portion(8) is downwardly protruded. A guide support plate(10) is inserted to the support guide plate coupling portion with a bearing(13) interposed therebetween. The guide support plate has a bearing mount portion(11) having an inner surface with a protrusion(11a). A bearing fixing member(14) with a screw hole(14a) is coupled to a screw portion(8b) of the support guide plate coupling portion. A rotatable cutter(15) having an outer surface with a plurality of cutting blades is fixed at a lower end of the rotation shaft by a cutter fixing bolt(17) having a guide bearing(16). A hard metal plate(12) is integrally fixed at a lower surface of the support guide plate.

Description

Chamfering machine using air tool {Rounding and chamfering device using air tool}

1 is an exploded perspective view showing a chamfering machine using an air tool according to the present invention.

Figure 2 is a side cross-sectional view showing the assembled state of the chamfering machine using the air tool according to the present invention.

Figure 3 is a side view showing a state of use of the chamfering machine using the air tool according to the present invention.

Figure 4 is an explanatory view showing a rotation cutter replacement process of the chamfering machine using the air tool according to the present invention.

<Explanation of symbols for main parts of drawing>

DESCRIPTION OF SYMBOLS 1 Chamfering machine 2 Air tool body 3 Head part

3a: Wrench insertion hole 4: Hose connection part 5: Rotating shaft

5a: through hole 5b: left torsion groove 5c: wrench groove

6: Rotating Mount Fastener 6a: Rotating Shaft Insert Hole 6b: Screw

6c: height adjustment groove 7: rotation mount 7a: screw hole

7b: bolt fastening hole 7c: gear groove portion 8: support guide plate coupling portion

8a: rotary shaft insertion hole 8b: screw portion 9: height adjustment bolt

10: support guide plate 10a: through hole 11: bearing mounting portion

11a: engaging jaw 12: cemented carbide plate 13: bearing

14 bearing retainer 14a screw hole 15 rotary cutter

16: guide bearing 17: cutter fixing bolt 18: reduction gear

18a: gear fixing shaft 18b: gear fixing bolt 19: gear cover

19a: fixed screw

The present invention relates to a chamfer using an air tool, and more particularly to the air vortex formed by the left torsion groove of the rotary shaft to prevent the wear of the support guide plate by friction with the workpiece during the chamfering operation It is possible to prevent dust, etc. generated during chamfering work, from flowing into the inside of the drive part, and to easily and easily replace the rotating cutter, and during the chamfering work, the support guide plate has a uniform rotation speed. The present invention relates to a chamfering machine using an air tool, which enables to reliably support the chamfering machine while maintaining the chamfer, thereby enabling a precise machining.

In general, a chamfer using a conventional air tool mainly used for rounding or chamfering the corners of a work piece is provided at a lower end of a rotating shaft rotatably inserted into a head of an air tool driven by compressed air. The rotary cutter for cutting the corners of the workpiece is fixedly fixed by a cutter fixing bolt with a guide bearing, and a rotary mount having a shaft insertion hole penetrated at the center of the head is screwed into the lower portion of the rotary mount. It is configured to be rotatably installed through the bearing plate-shaped support guide plate through-hole formed in the center.

Chamfering machine using the conventional air tool configured as described above is first set by adjusting the cutting height of the rotary cutter projecting from the center of the lower surface of the support guide plate to the machining dimension by loosening or tightening the rotary mount screwed to the lower end of the head part. After completing, the lower surface side of the support guide plate is to be in surface contact with the upper surface of the workpiece, and the guide bearing installed on the lower side of the rotary cutter is in contact with the side of the workpiece, and the outer edge of the rotary cutter is at the edge of the workpiece. By rotating the air tool slowly in the state in which a plurality of cutting edges formed in contact with the cutting edges, the rounded corners of the workpiece are easily rounded by the cutting edge of the rotating cutter that rotates at high speed according to the rotation of the rotating shaft. It can be machined or chamfered.

However, the chamfering machine using the conventional air tool configured as described above has some problems as follows.

First, the chamfering machine using a conventional air tool is used while continuously moving one side of the lower surface of the support guide plate rotatably installed at the head load end in close contact with the upper surface of the workpiece during operation, so that the lower surface of the support guide plate is to be processed. Abrasion is caused by the constant friction with the upper surface of the, and the wear of the support guide plate is more severe depending on the material or surface condition of the workpiece, there was a problem that the durability is significantly reduced.

Secondly, the chamfering machine using the conventional air tool has a problem in that the dust and the like generated during the chamfering work are introduced into the driving part of the rotating shaft rotatably installed in the head part, thereby causing the wear of the driving part of the rotating shaft.

Third, the chamfering machine using the conventional air tool has to loosen the cutter fixing bolt with a guide bearing that fixes the rotating cutter at the bottom of the rotating shaft when replacing the worn rotating cutter. Raise and lower the rotary mount screwed to the proper height of the lower part to match the through hole formed in the lower part of the rotary shaft inserted in the shaft insertion hole of the rotary mount and the through hole formed on the outer peripheral side of the rotary mount screwed to the lower end of the head part. Insert the pin for fixing the rotating shaft through this hole and fix it so that the rotating shaft does not move. Then, remove the worn rotating cutter by loosening the cutter fixing bolt with the guide bearing at the bottom of the shaft using a hexagon wrench, etc. Since the cutting height of the rotary cutter must be set again after the cutter is mounted, the rotary cutter must be replaced. There was a problem that the backup is cumbersome.

Fourthly, the chamfering machine using the conventional air tool is freely centered on the lower outer circumference of the rotary mount screwed to the lower end of the head part via a bearing, the support guide plate which supports the chamfering surface to the upper surface of the workpiece during chamfering operation Since it is installed to be rotatable, if the support guide plate cannot be pressurized with a constant force, the support guide plate rotates at an uneven speed and does not stably support the chamfering machine, so that precision machining cannot be made and the processing quality is significantly reduced. There was this.

The present invention has been made in order to solve the above problems, the head of the air tool driven by the compressed air, the rotary shaft is mounted vertically inserted into the rotary shaft equipped with a rotary cutter for cutting the corner of the workpiece at the bottom At the load end, a rotating mount with a shaft insertion hole penetrated at the center thereof is screwed, and a lower portion of the rotary mount includes a chamfering device for rotatably installing a disk-shaped support guide plate with a through hole formed at the center thereof. Since the cemented carbide plate to reinforce the surface hardness is fixed to prevent the wear of the support guide plate by friction with the workpiece during the chamfering work, and the air vortex is formed on the lower outer periphery of the rotary shaft when the rotary shaft is rotated Left torsion of the rotating shaft by forming a plurality of left torsion grooves It is possible to prevent the dust and the like generated during the chamfering operation due to the air vortex formed by the part to be introduced into the drive unit, and the hexagonal surface for fixing the rotary shaft when replacing the rotary cutter on the upper surface of the head and the top of the rotary shaft The wrench insertion hole into which the wrench is inserted and the wrench groove are formed so that the replacement of the rotary cutter can be easily and easily performed, and the gear groove is formed at the outer periphery of the rotary mount and rotates below the rotary mount. On the upper side of the support guide plate that can be installed, the reduction gear geared to the gear groove part and the gear cover surrounding the reduction gear are fixedly installed so that the support guide plate can stably support the chamfer while chamfering work. Precise machining is possible, greatly improving the processing quality. And that to be able to image a technical problem.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4 to achieve the above object.

1 is an exploded perspective view showing a chamfer using the air tool according to the present invention, Figure 2 is a side cross-sectional view showing the assembled state of the chamfer using the air tool according to the present invention, Figure 3 is an air tool according to the present invention Figure 4 is a side view showing the state of use of the chamfer used, Figure 4 is an explanatory view showing a rotation cutter replacement process of the chamfer using the air tool according to the present invention.

Chamfering using the air tool according to the present invention as shown in Figures 1 to 4, the front end is a head portion that is installed vertically rotatably inserted through the rotary shaft (5) through-hole 5a is formed through the lower one side (3) is formed and the rear end is provided with an air tool body (2) formed with a hose connection portion 4 is connected to the compressed air supply hose.

The rotating shaft insertion hole 6a is formed at the center of the upper surface of the head portion 3 of the air tool body 2, and the screw portion 6b is formed at the outer circumference thereof. Rotating fasteners (6) formed by 90 degrees intervals are screwed.

The lower portion of the rotary mount fastener 6 is formed through the screw hole (7a) in the center of the upper surface, and the bolt fastening hole (7b) is formed through the bolt fastening hole (7b) is fastened to the outer peripheral edge portion of the outer peripheral portion and The rotating shaft insertion hole (8a) is formed through the center and the rotating mount (7) formed so that the support guide plate engaging portion (8) formed with a screw portion (8b) on the lower outer periphery is projected downward.

The support guide plate coupling portion 8 of the rotating mount 7 is formed in a ring shape at the outer circumference of the through hole 10a formed in the center of the upper surface, and the bearing mounting portion 11 is provided with a locking jaw 11a at the inner peripheral edge thereof. ) Is formed to protrude upward and the support guide plate 10 is fixedly inserted into the cemented carbide plate 12 to strengthen the surface hardness on the lower surface is rotatably inserted through the bearing (13).

At this time, the cemented carbide plate 12 fixed to the lower surface of the support guide plate 10 is a sintered alloy made by mixing metal powders such as cobalt and nickel with tungsten carbide, and has high strength at high heat. ㆍ It is made of cemented carbide material that is commonly used as a material for making cutting tools for steel products, and this cemented carbide plate 12 is manufactured in the same shape as the lower surface of the support guide plate 10 and then of the support guide plate 10. It is firmly fixed to the lower surface with silver solder.

Support guide plate engaging portion of the rotary mount (7) is inserted into the through hole (10a) of the support guide plate 10 through the central portion of the bearing 13 installed in the bearing mounting portion 11 of the support guide plate 10 (8) of the screw portion (8b) is screwed to the bearing fixture 14 through which the screw hole (14a) is formed in the center of the upper surface.

Through the rotary shaft insertion hole (6a) of the rotary mount fastener 6 and the rotary shaft insertion hole (8a) of the support guide plate engaging portion (8) formed in the rotary mount (7) to the center of the lower surface of the support guide plate 10 The lower end of the protruding rotary shaft 5 is configured such that the rotary cutter 15 having a plurality of cutting edges formed on the outer circumference thereof is fixed by the cutter fixing bolt 17 provided with the guide bearing 16 at the lower end thereof.

In another embodiment of the chamfer using the air tool according to the present invention, a plurality of left torsion grooves 5b for forming air vortices at the time of rotation of the rotary shaft 5 on the lower outer periphery of the rotary shaft 5 are formed concave. Characterized in that configured to.

In addition, as another embodiment of the chamfer using the air tool according to the present invention, the rotary cutter (top) of the head portion (3) of the air tool body (2) and the upper end of the rotary shaft (5) inserted into the head portion (3) It is characterized in that the wrench insertion hole (3a) and the wrench groove (5c) is inserted into the hexagonal wrench for fixing the rotation shaft (5) when the replacement of 15) is formed, respectively.

In addition, as another embodiment of the chamfering machine using the air tool according to the present invention, the gear groove portion 7c is formed in the outer peripheral edge of the rotary mount 7 and the rotary mount (1) on one side of the upper surface of the support guide plate 10. It is characterized in that the gear cover (19) surrounding the reduction gear 18 and the reduction gear 18 to be engaged to the gear groove portion 7c of 7) is configured to be fixed.

At this time, the reduction gear 18 is firmly installed by the gear fixing bolt (18b) on the upper end of the gear shaft (18a) screwed to one side of the upper surface of the support guide plate 10, the gear cover (19) Is installed so as to surround the upper portion of the reduction gear 18 so that the reduction gear 18 is not exposed to the outside is fixed to the upper surface of the support guide plate 10 by a fixed screw (19a).

Referring to the operation of the chamfering machine using the air tool according to the present invention configured as described above are as follows.

When rounding or chamfering the corners of the workpiece by using the chamfer using the air tool according to the present invention, as shown in FIG. 2, first, the rotary mount screwed to the inner bottom of the head 3 Loosen the height adjustment bolt 9 fastened to the bolt fastening hole 7b of the rotary mount 7 screwed to the fastener 6, and the rotary mount 7 rotates freely about the rotary mount fastener 6. After making it possible, the rotary mount 7 is appropriately rotated along the threaded portion 6b of the rotary mount fastener 6 so that the cutting height of the rotary cutter 15 protruding from the center of the lower surface of the support guide plate 10 is reduced. After setting to adjust to the rounding or chamfering dimension to be processed, tighten the height adjustment bolt (9) fastened to the bolt fastening hole (7b) of the rotary mount (7) the end of the height adjustment bolt (9) head (3) screwed on the inner bottom Before mounting, thereby fixing the mount to prevent rotation (7) By be inserted into the height adjustment groove (6c) of the fastener (6) is not rotated around the fastening rotational mounting opening (6).

At this time, four height adjusting grooves 6c are formed at the outer peripheral edges of the rotary mount fastener 6 at intervals of 90 degrees, so that the cutting height of the rotary cutter 15 is outside the rotary mount fastener 6. Since it can be adjusted to the size corresponding to a quarter of the pitch interval of the threaded portion (6b) formed on the periphery, more precise height setting is possible.

After completing the setting operation for the cutting height of the rotary cutter 15 as shown in Figure 3, the cemented carbide is fixed to the lower surface of the support guide plate 10 on the upper surface of the workpiece 20 to be processed The plate 12 is brought into surface contact, the side of the workpiece 20 is in contact with the guide bearing 16 installed on the lower portion of the rotary cutter 15, the edge of the workpiece 20, the rotary cutter 15 When a plurality of cutting blades formed on the outer periphery of the contact is driven to move slowly in the corner direction by driving the air tool main body 2, the rotary cutter is mounted on the lower end of the rotary shaft 5 to rotate at high speed ( By the cutting edge of 15), the corner portion of the workpiece 20 can be easily rounded or chamfered.

At this time, the support guide plate 10 which is rotatably installed on the support guide plate engaging portion 8 of the rotary mount 7 installed at the lower end of the head part 3 via the bearing 13 is a cemented carbide fixed to the lower surface. Since the surface hardness is firmly reinforced by the plate 12, wear due to continuous friction with the upper surface of the workpiece 20 during the chamfering operation can be prevented, thereby significantly improving durability.

In addition, according to another embodiment of the chamfer using the air tool according to the present invention, as shown in Figure 3 so that the rotary shaft 5 installed inside the head portion 3 when the chamfer is driven to rotate at high speed While the plurality of left torsion grooves 5b formed concave on the lower outer periphery of the rotary shaft 5 continuously form strong air vortices, a large amount of dust generated during the chamfering operation is moved into the driving part of the rotary shaft 5. It is possible to prevent the inflow and at the same time to discharge it to the outside it is possible to significantly improve the durability.

In addition, according to another embodiment of the chamfering machine using the air tool according to the present invention, as shown in FIG. Inserted so as to engage with the wrench groove (5c) formed concave on the upper end of the rotating shaft (5) inserted into the head (3) through the wrench insertion hole (3a) formed through the upper surface of the head (3) of the tool body (2) To fix the rotating shaft 5 inserted into the head 3 so as not to move, and then loosen the cutter fixing bolt 17 using another hexagon wrench 22 and remove the worn rotating cutter 15. After installing a new rotary cutter (15), and then tighten the cutter fixing bolt 17 again to secure the new rotary cutter 15 to the lower end of the rotary shaft (5) further replacement of the rotary cutter (15) It will be easier and easier to perform.

Further, according to another embodiment of the chamfering machine using the air tool according to the present invention, as shown in Figure 3, the bearing 13 to the support guide plate engaging portion 8 of the rotary mount (7) during chamfering operation The support guide plate (10) rotatably installed via the gear retainer is maintained by the reduction gear (18) meshed with the gear groove (7c) formed in the outer periphery of the rotary mount (7). Since it can support more and more stably, it enables precise machining and can greatly improve the machining quality.

In addition, since the reduction gear 18 is protected from being exposed to the outside by the gear cover 19 fixedly installed on one side of the upper surface of the support guide plate 10 so as to surround the upper portion, it is possible to work more safely.

As described above, the chamfer using the air tool according to the present invention is constructed such that the cemented carbide plate reinforcing the surface hardness is fixedly installed on the lower surface of the support guide plate rotatably installed at the head load end of the air tool main body. There is an effect that can greatly improve the durability by preventing the wear of the support guide plate by friction.

In addition, the chamfering machine using the air tool according to the present invention is configured to form a plurality of left torsion grooves for forming air vortices when the rotating shaft is rotated on the lower outer periphery of the rotating shaft inserted into the head portion of the air tool body. The dust generated during the chamfering operation by the air vortex formed by the left torsion groove portion is prevented from entering the inside of the drive unit has an effect that can significantly improve the durability.

In addition, the chamfer using the air tool according to the present invention is configured to form a wrench insertion hole and a wrench groove for inserting a hexagon wrench for fixing the rotary shaft when the rotary cutter is replaced on the upper surface of the head and the upper end of the rotary shaft of the rotary cutter. There is an effect that the replacement can be easily and easily performed.

In addition, the chamfer using the air tool according to the present invention is formed on the outer periphery of the rotary mount coupled to the lower end of the head portion is formed on the upper surface side of the disk-shaped support guide plate which is rotatably installed in the lower portion of the rotary mount Since the reduction gear geared to the gear groove part and the gear cover surrounding the reduction gear are fixedly installed, the support guide plate can stably support the chamfering while maintaining the uniform rotation speed during chamfering work, enabling precise machining There is an effect that can be greatly improved.

Claims (8)

The front end is formed with a head portion (3) is inserted into the rotary shaft (5) through which the through hole (5a) is formed to be vertically rotatable at the lower side, and the hose connection portion (4) is connected to the compressed air supply hose at the rear end The formed air tool body 2 is provided, the rotary shaft insertion hole (6a) is formed in the center of the upper surface through the inner bottom of the head portion 3 of the air tool body 2 and the threaded portion (6b) is formed on the outer periphery Rotating mounting fasteners 6 having four height adjustment grooves 6c formed at 90 degree intervals are screwed to the outer peripheral edges thereof, and screw holes 7a are formed at the center of the upper surface of the lower mounting fastening holes 6. The bolt fastening hole 7b through which the height adjustment bolt 9 is fastened to one side of the outer circumferential edge is formed through, and the rotating shaft insertion hole 8a is formed through the center of the lower surface thereof, and the thread portion 8b on the lower outer circumference thereof. Rotating mount formed so that the support guide plate coupling portion 8 is formed downward ( 7) is screwed, the support guide plate coupling portion (8) of the rotary mount (7) is formed in a ring shape on the outer periphery of the through hole (10a) formed in the center of the upper surface and the locking jaw (11a) in the lower inner periphery The support guide plate 10 is formed to be rotatably inserted through the bearing 13, the support guide plate 10 is formed so that the provided bearing mounting portion 11 is projected upward, and is installed on the bearing mounting portion 11 of the support guide plate 10 The threaded hole 14a is located in the center of the upper surface of the threaded portion 8b of the support guide plate engaging portion 8 of the rotary mount 7 inserted through the central portion of the bearing 13 and inserted into the through hole 10a of the support guide plate 10. The bearing fixing tool 14, through which the through hole is formed, is screwed, and the rotating shaft insertion hole 8a of the support shaft coupling hole 8 formed in the rotary shaft insertion hole 6a and the rotary mount 7 of the rotary mount fastening member 6 is formed therein. The outer periphery of the lower end of the rotary shaft (5) protruding through the center of the lower surface of the support guide plate 10 through In configured to rotate the cutter 15 formed plurality of the cutting edge portion is to be securely fixed by the guide bearing 16 of the cutter fixing bolt 17 provided with, Chamfering machine using an air tool, characterized in that the cemented carbide plate 12 for reinforcing the surface hardness on the lower surface of the support guide plate 10 is configured to be fixedly installed. According to claim 1, wherein the lower outer periphery of the rotary shaft (5) using the air tool, characterized in that the plurality of left torsion grooves (5b) for forming an air vortex during the rotation of the rotary shaft 5 is formed concave Chamfering machine. According to claim 1, wherein the rotating shaft (5) is fixed when the rotating cutter (15) is replaced on the upper portion of the head portion (3) of the air tool body (2) and the upper portion of the rotating shaft (5) inserted into the head portion (3). Chamfering using an air tool, characterized in that the wrench insertion hole (3a) and the wrench groove (5c) is inserted into the hexagonal wrench to be formed. According to claim 1, wherein the outer periphery of the rotary mount (7) is formed with a gear groove portion (7c) and one side of the upper surface of the support guide plate 10 is meshed with the gear groove portion (7c) of the rotary mount (7) Chamfering device using an air tool, characterized in that the gear cover 19 surrounding the reduction gear 18 and the reduction gear 18 is configured to be fixed. 3. The rotating shaft 5 is fixed when the rotating cutter 15 is replaced on the upper surface of the head portion 3 of the air tool body 2 and the upper portion of the rotating shaft 5 inserted into the inside of the head portion 3. Chamfering using an air tool, characterized in that the wrench insertion hole (3a) and the wrench groove (5c) is inserted into the hexagonal wrench to be formed. According to claim 2, wherein the outer periphery of the rotary mount 7 is formed in the gear groove portion 7c and the upper surface side of the support guide plate 10 is meshed with the gear groove portion 7c of the rotary mount (7) Chamfering device using an air tool, characterized in that the gear cover 19 surrounding the reduction gear 18 and the reduction gear 18 is configured to be fixed. According to claim 3, wherein the outer peripheral edge of the rotary mount 7 is formed with a gear groove (7c) and the upper surface side of the support guide plate 10 is meshed with the gear groove (7c) of the rotary mount (7) Chamfering device using an air tool, characterized in that the gear cover 19 surrounding the reduction gear 18 and the reduction gear 18 is configured to be fixed. According to claim 5, The outer periphery of the rotary mount 7 is formed in the gear groove portion (7c) and one side of the upper surface of the support guide plate 10 is meshed with the gear groove portion (7c) of the rotary mount (7) Chamfering device using an air tool, characterized in that the gear cover 19 surrounding the reduction gear 18 and the reduction gear 18 is configured to be fixed.

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