KR102043753B1 - Automatic chamfering machine for steel plate - Google Patents

Abstract

The present invention relates to an automatic chamfering machine for a steel plate, to increase cutting force of a chamfering cutter. According to the present invention, the automatic chamfering machine for a steel plate comprises: a discharging hole (4a, 4b) formed in a gear box (4) to be vertically penetrated; an inclined discharging hole (25, 25a) formed in the inner part of both sides of a case (20) to be downwardly inclined, wherein an inner portion of both the inclined discharging holes (25, 25a) communicate with an external space (35); and an air spray hole (26) and an air spray hole installation hole (27) formed on a base frame corresponding to the discharging hole (4a, 4b).

Description

Automatic chamfering machine for steel plate}

The present invention relates to an automatic chamfering machine for a steel plate, and more specifically, to form a slope inclined downward downward on both sides of the cylinder included in the drive unit, and by forming a plurality of small internal diameter of the inclined exhaust mechanism, the inside of the drive unit The air exhausted to the outside from the vane-type air motor of the exhaust air is rapidly exhausted to minimize the resistance to improve the rotational force of the rotor, thereby increasing the cutting force of the chamfering cutter.

The invention of the present invention is filed by the applicant of the prior invention and registered a patent is registered in the Republic of Korea Patent Registration No. 10-1915015 (name of the invention: the magnet height adjusting device of the iron plate automatic chamfering machine) and its technical content is known by the patent publication In this conventional invention, a magnet height adjusting device is included in a basic configuration of chamfering a corner of an iron plate with a chamfering cutter while traveling in a state where the automatic chamfering machine is separated from a workpiece made of iron plate with strong magnetic force.

The present invention mainly describes the description of the conventional invention according to the drive unit for driving the chamfering cutter as the main portion, the conventional invention is the chamfering cutter according to the main height of the magnet height adjustment device of the automatic sheet chamfering machine Note that a specific description of the driving unit to be driven is not described.

1 to 3, the traveling device unit (not shown) for driving the automatic chamfer 100, and the automatic chamfer 100 is not separated from the workpiece made of steel plate to the workpiece side A magnet device portion (not shown) that generates magnetic force to be pulled, and an air tank (not shown) filled with air supplied from an external separate compressor 1 are installed on one side of the base frame 2, and those device portions are provided. (Driver unit, the magnet unit, the outside of the air tank) is installed to cover the case 3, the drive unit for driving the vane-type air motor 30 by the air pressure supplied through the air tank on the other side 10 is provided, and one side thereof is provided with a cutting device section 50 for operating the chamfering cutter with the driving force generated by the driving device section 10.

The conventional drive unit 10 and the cutting unit 50 are installed on the gear box 4 is installed on the upper surface of the base frame 2, the drive gear is installed below the drive unit 10 (5) and the driven gear 6 which is installed in the middle of the cutting device 50 are engaged in the gearbox 4, and chamfered at the lower end of the cutter shaft 7 provided downward of the driven gear 6 downward. The cutter 8 is installed.

The drive unit 10 has a vane type air motor 30 is installed inside the cylinder 20 to form a space therein, the cylinder 20 is a cylindrical tube vertically installed on the gear box (4) An upper cap having an air inlet 24 for connecting air from the air tank to one side of the drive casing 21 having a shape, and connected to the upper portion of the drive casing 21 by a nut-shaped connector 22. 23).

The vane air motor 30 is well known to be widely used in equipment such as a pneumatic grinder (grinding machine) described in the invention of Patent No. 10-153079, and such a known vane air motor 30 is provided on the wall surface. A mechanism 32 and an exhaust port 33 are formed to penetrate in and out at intervals, and a tubular eccentric cylinder 31 in which an inner space 34 is eccentrically inserted is inserted into and installed in the drive casing 21. In the inner space (34) of the eccentric cylinder (31), a rotor (38) is inserted into the vane groove (36) formed radially with its outer surface in contact with the inner circumferential surface of the eccentric cylinder (31). have.

The upper and lower shafts of the rotor 38 are rotatably supported by the upper and lower shaft support members 39 and 40, which are installed in a state in which a bearing is interposed between the upper and lower parts of the cylinder 20, and the drive gear is provided on the lower shaft of the rotor 38. (5) is installed, the air inlet 24 formed in the upper cap 23 and the air supply port 32 of the eccentric cylinder 31 is formed through, the outside of the eccentric cylinder 31 on the outside of the cylinder 20 An elbow 41 is connected at right angles to allow air flowing into the outer space 35 formed between the surface and the inner surface of the cylinder 20 to be exhausted to the outside.

Below the vertical portion of the elbow 41 is connected to the air discharge pipe 42 is connected to the air injection port 43 for injecting air into the chamfering cutter 8 at the lower end.

In the conventional invention as described above, when air flows into the air inlet 24 above the tubular body 20, the air inlet 32 of the eccentric cylinder 31 communicating with the air inlet 24 is introduced. Air flows into the eccentric cylinder 31 and flows into the inner space 34 formed between the inner circumferential surface of the eccentric cylinder 31 and the outer circumferential surface of the rotor 38.

The air introduced into the inner space 34 flows into the space between two adjacent vanes 37 and is trapped. The rotor 38 is freely inserted into the eccentric inner space 34 of the eccentric cylinder 31. The rotor 38 rotates as the vanes 37 are pushed into the space between the two vanes 37 by being trapped by the trapped air pressure.

When the air trapped portion between the two vanes 37 radially installed on the rotating rotor 38 moves toward the exhaust port 33 by the rotation of the rotor 38, the air trapped in the space moves the exhaust port 33. Through the exhaust gas into the outer space 35 formed between the outer circumference of the eccentric cylinder 31 and the inner circumference of the cylinder 20, it exits toward the elbow 41 communicating with the outer space 35.

Through this process, the rotor 38 continuously rotates so that the drive gear 5 installed on the lower shaft below the rotor 38 rotates, and the driven gear 6 meshed with the drive gear 5 rotates together. The chamfering cutter 8 installed at the lower end of the cutter shaft 7 of the driven gear 6 rotates to chamfer the edge of the workpiece.

Thus, when air is exhausted from the outer space 35 of the vane type air motor 30 to the elbow 41, the horizontal hole 41a of the elbow 41 is connected to only one place perpendicular to the cylinder 20. Some air is reflected toward the horizontal hole 41a into which air is introduced, while some hit the upper surface of the vertical hole 41b as shown in "a" of 2 and 3, and the vertical hole 41b is bent downward in the vertical direction. Down to the vertical hole (41b) is blown through the air discharge pipe 42 below the elbow (41) to the air injection port (43) to inject air to the chamfering cutter (8) to blow the chip and In addition, deterioration of the chamfering cutter (8) is prevented.

In the conventional invention, the air exhausted from the vane-type air motor 30 is exhausted intensively to only one elbow 41, and a part of the air exhausted to the elbow 41 is vertically opened as shown by "a". Since it hits the upper surface of the 41b immediately and is reflected, the air flowing into the horizontal hole 41a is blocked, and the air exhausted from the vane type air motor 30 toward the elbow 41 cannot be smoothly exhausted. The problem of slowing down the rotation speed of 38) occurred.

As described above, air is not quickly exhausted from the vane type air motor 30 to the elbow 41 side, and thus the rotational speed of the rotor 38 is lowered, thereby lowering the rotational force of the rotor and cutting force of the chamfering cutter 8. I had this problem of deterioration.

Patent Registration No. 10-1915015 (Invention: Magnet Height Adjusting Device of Iron Plate Automatic Chamfering Machine)

The present invention is to solve the above problems, the inclined exhaust port is formed to be inclined downward on both sides of the cylinder included in the drive unit, the inclined exhaust mechanism is formed by a plurality of small inner diameter, vane type inside the drive unit The technical problem is that the air exhausted from the air motor to the outside is quickly exhausted in a state where the resistance is minimized to improve the rotational force of the rotor, thereby increasing the cutting force of the chamfering cutter.

In the present invention for achieving the above object, a magnet, a wheel, a chamfering cutter, and an air injection port for spraying to the chamfering cutter side are respectively installed in the lower portion of the base frame, the upper portion of the base frame to form a space therein A well-known vane-type air motor is installed in the cylinder body so that the air supply port and the exhaust port are penetrated in and out at intervals in the circumferential direction on the wall, and the cylinder is a cylindrical tubular drive device casing installed vertically on the gearbox. And, the drive unit is connected to the upper portion of the drive casing by a nut-shaped connector and the upper cap is formed on one side to form an air inlet through which air is introduced from the air tank, and the driving force of the known vane type air motor Cutter shaft is installed on the cutter shaft that is rotated by the transmission of the chamfering cutter is screwed with the female thread formed on the inner periphery of the casing And a cutting device part is provided with the male screw portion, and a driving gear rotated by the power generated by the drive unit. In the iron plate automatic chamfering machine is provided with a gear box that accommodates the driven gear that is engaged with the drive gear, the exhaust hole is formed to penetrate up and down in the gear box, the air flowing into the air inlet in both sides of the cylinder An inclined exhaust hole is formed to be inclined downwardly through the vane-type air motor to the exhaust holes on both sides of the gear box, and an inner portion of the inclined exhaust holes is formed through the external space, and an air spray is applied to the base frame corresponding to the exhaust hole. Holes and injection hole installation holes are formed respectively, the inclined exhaust hole is formed of a plurality of small inner diameter is separated in the same direction, the interval between the inclined exhaust hole is characterized in that formed at a smaller interval than the inner diameter of the inclined exhaust hole, In an embodiment, the cutting device unit has an arrow-shaped support on the upper outer periphery of the casing installed on the gearbox. And the display section is formed, the lower outer periphery of the handle which is fixed to the cutter axis, characterized in that the upper part of the scale display formation.

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As described above, the automatic chamfering machine for the iron plate of the present invention forms an inclined exhaust pipe downward on both sides of the cylinder included in the drive unit, and forms the inclined exhaust pipe in a plurality of small inner diameters. The air exhausted to the outside from the recognition air motor is quickly exhausted in a state where the resistance is minimized to improve the rotational force of the rotor, thereby increasing the cutting force of the chamfering cutter.

1 is a perspective view showing a conventional invention.
2 is a cross-sectional view showing a drive unit included in the conventional invention.
3 is a cross-sectional view taken along the line AA of FIG.
4 is a perspective view of the present invention;
5 is a bottom perspective view showing the present invention.
Figure 6 is a side view of the present invention.
7 is a cross-sectional view showing a drive unit included in the present invention.
8 is a cross-sectional view taken along line BB of FIG. 7.

Hereinafter, with reference to the accompanying drawings, Figures 4 to 8 attached to the automatic sheet chamfer for iron according to the present invention.

In the automatic chamfer 100 according to the present invention, as shown in Figs. 4 to 7, the magnet 9a, the wheel 9, and the chamfering cutter 8 are respectively installed at the bottom of the base frame 2, respectively. Chamfering the corner portion of the iron plate while traveling on the iron plate, the chamfering cutter driving means for driving the chamfering cutter 8 is driven by the air supplied through the air tank (not shown) installed inside the case (3) Recognition air motor 30 includes a drive unit 10 is installed therein, and a cutting device unit 50 for receiving the driving force of the vane-type air motor 30 through the gear to rotate the chamfering cutter (8). .

The magnet 9a is installed close to the iron plate to be processed at a predetermined interval so that the auto chamfer 100 is pulled toward the iron plate side by the magnetic force of the magnet so as not to be separated from the iron plate, and the wheel 9 is Rotation is driven by a motor installed inside the case 3 of the automatic chamfering machine 100 to travel on the iron plate, and the chamfering cutter 8 rotates by the chamfering cutter driving means while chamfering the corners of the iron plate. It is.

Then, the air supplied to the vane-type air motor 30 is the compressor (1) is connected through the automatic chamfer 100 and the air hose is filled in the air tank in the automatic chamfer 100, the air tank The air to be filled is supplied to the vane type air motor 30 inside the driving unit 10.

As shown in FIG. 7 and FIG. 8, a driving gear 5 that rotates by power generated by the driving unit 10 and a driven member engaged with the driving gear 5 are located at an upper portion of the base frame 2. The gear box 4 is accommodated and the gear box 4 formed so that the exhaust holes 4a and 4b through which the moving air is exhausted when the vane-type air motor 30 is driven on both sides is stacked and installed. The drive unit 10 and the cutting unit 50 are provided at the top of the box 4, respectively.

The drive unit 10 is provided with a known vane-type air motor 30 inside the cylinder 20 forming a space therein, the cylinder 20 is installed vertically on the gear box (4) An upper cap which is connected to the driving device casing 21 and the upper portion of the driving device casing 21 by a nut-shaped connector 22 and forms an air inlet 24 through which air flows from an air tank (not shown). 23).

In addition, the air flowing into the air inlet 24 is introduced into the both sides of the driving device casing 21 of the cylinder 20 through both vane type air motors 30 and the exhaust holes 4a and 4b of the gear box 4. Inclined exhaust holes (25, 25a) to be exhausted to the inclined downwardly formed.

At this time, the inner portion of both inclined exhaust holes (25, 25a) is the air exhausted to the exhaust port 33 through the outer space 35 inside the drive casing 21 to the respective inclined exhaust holes (25, 25a) As it is exhausted, the rotor 38 in which the vanes 37 are installed is rotated.

The inclined exhaust holes 25 and 25a have a plurality of small inner diameters formed in the same direction, and the space between the inclined exhaust holes 25 and 25a is formed at an interval smaller than the inner diameter of the inclined exhaust holes 25 and 25a. In the case where the entire internal cross-sectional area of the exhaust hole is assumed to be the same, air is quickly exhausted when the inclined exhaust hole is separated into several smaller inner diameters than one large inner diameter.

Applicants of the present invention, as shown in Figures 7 and 8 formed four inclined exhaust holes 25 on the left side, and the inclined exhaust holes 25a on the right side on the drawing formed six, Two more exhaust holes 25a are formed on the left side of the inclined exhaust hole 25 on the left side. Was designed and prototyped.

In addition, the inclined exhaust holes (25, 25a) is formed between the small inclined exhaust holes (25, 25a) at intervals of 0.5 to 2 mm while forming the size of the inner diameter of 3 to 5 mm, the reason When the inner diameter of the inclined exhaust holes 25 and 25a is 3 mm or less, resistance is generated when air flows into the inclined exhaust holes 25 and 25a, and in the case of 5 mm or more, the flow rate of air is slowed. If the closed end of the drive casing 21 is increased in volume, and the interval between the inclined exhaust holes 25 and 25a is 0.5 mm or less, the inclined exhaust hole 25 is formed in the drive casing 21 made of aluminum. When the drill 25a) is inclined with a drill, there may be a problem that the adjacent inclined exhaust holes 25 and 25a merge, and when the gap is formed to be 2 mm or more, the inclined exhaust holes 25 and 25a may flow into the inclined exhaust holes 25 and 25a. This is because a problem occurs when the volume of the resistance and the drive casing 21 becomes large.

In addition, an air injection hole 26 and an injection hole installation hole 27 are formed in the base frame 2 corresponding to the exhaust holes 4a and 4b of the gear box 4, respectively, and in the injection hole installation hole 27. An air injection hole 43 for cooling the chamfering cutter 8 and blowing the chip while injecting the air exhausted through the one side inclined exhaust hole 25a to the chamfering cutter 8 is provided.

The vane type air motor 30 is known in the same structure as the vane type air motor 30 installed in the drive unit 10 of the related art.

That is, the known vane type air motor 30 is formed so that the air supply port 32 and the exhaust port 33 penetrate in and out at intervals in the circumferential direction on the wall, and the inner space 34 is eccentrically formed. The cylinder 31 is inserted into the cylinder 20 in the vertical direction, and an outer space 35 is formed between the outer circumference of the eccentric cylinder 31 and the inner circumference of the cylinder 20, and the eccentric cylinder ( In the inner space 34 of the rotor 31, a rotor 38 in which a vane 37, whose outer surface is in contact with the inner wall surface of the eccentric cylinder 31, is inserted into the radially formed vane groove 36, is rotatably inserted.

The upper and lower shafts of the rotor 38 are rotatably supported by the upper and lower shaft support members 39 and 40, which are installed in a state in which a bearing is interposed between the upper and lower parts of the cylinder 20, and the drive gear is provided on the lower shaft of the rotor 38. (5) is provided, and the air inlet 24 formed in the upper cap 23 and the air supply port 32 of the eccentric cylinder 31 are formed to communicate with each other.

As shown in FIG. 6, the cutting device unit 50 has an arrow-shaped indicator display unit 52 formed on the upper outer periphery of the casing 51 installed on the gear box 4, and the driven gear 6 is formed. The cutter shaft 7 to be installed is provided with a female thread formed on the inner circumference of the casing 51 and a male screw portion fastened by a screw type, and a lower outer circumference of the handle 53 fixedly coupled to the upper portion of the cutter shaft 7. The scale display part 54 is formed in the display, and it is possible to make fine adjustments while visually checking the raising and lowering height of the chamfering cutter 8 provided in the lower end of the cutter shaft 7.

Reference numeral 1a of the reference numerals is a hose connector connected to the compressor 1 and a hose, and “24a” connects an air inlet 24 of the cylinder 20 and an air tank installed inside the case 3. Air supply pipe.

Referring to Figures 4 to 8 the operational relationship of the present invention configured as described above is as follows.

The automatic chamfer 100 according to the present invention is to chamfer the corners of the iron plate while traveling on the iron plate to be a workpiece in the same manner as the known automatic chamfering machine, as shown in Figs. 4 and 5 Compressor (1) Air (compressed air) generated in the air tank installed inside the case 3 of the automatic chamfering machine 100, the drive device portion that is so filled is the main part of the present invention through the air supply pipe (24a) It flows into the inside of (10).

As shown in FIGS. 7 and 8, the air flowing into the air inlet 24 of the drive unit 10 may have an eccentric cylinder 31 installed inside the vane type air motor 30 communicating with the air inlet 24. When the air inlet 32 is introduced, air is introduced into the eccentric inner space 34 formed between the inner circumference of the eccentric cylinder 31 and the outer circumference of the rotor 38.

At this time, the plurality of vanes 37 are radially installed in the eccentric inner space 34, and the vanes 37 are inserted into the vane groove 36 and the outer surface thereof is the inner wall surface of the eccentric cylinder 31. As it is in contact with each other, a trapped space is formed between two adjacent vanes 37. As the air is injected into the trapped space, the rotor 38 is rotated by the pressure of the injected air.

The vane 37 is inserted into the vane groove 36 in which the rotor 38 is formed in the radial direction so as to slide out in the radially outward direction by the centrifugal force generated when the rotor 38 rotates, and then the outer peripheral surface of the vane. The inner wall surface of the eccentric cylinder 31 is in contact with the inner wall 34 to be rotated without going out anymore.

When the rotor 38 rotates in this way and the space portion between two adjacent vanes 37 in which air is trapped passes through the exhaust port 33, the air trapped between the two vanes 37 is eccentric through the exhaust port 33. The outer space 35 outside the cylinder 31 exits and the air passes through the inclined exhaust holes 25 and 25a as the outer space 35 and the inclined exhaust holes 25 and 25a pass.

When the inclined exhaust holes 25 and 25a are formed in a plurality of small inner diameters, the inclined exhaust holes are formed in a plurality of smaller inner diameters than the inclined exhaust holes are formed in one large inner diameter in the same state. Will be exhausted quickly.

7, 8, the air injection port 43 is provided at the lowermost side of the inclined exhaust hole 25a formed on the right side of the drawing, and the nozzle portion in which the air from the outlet of the air injection port 43 is injected is reduced in the inner diameter. As the resistance is generated, the discharge rate of air is lowered. However, another inclined exhaust hole 25 is additionally formed on the left side in the drawing, and the inclined exhaust hole 25a on the right side is also used as the inclined exhaust hole 25 on the left side. At the same time, the air is exhausted and the air is quickly exhausted to the left and right inclined exhaust holes 25 and 25a so that the rotor 38 rotates quickly.

Air exhausted to the inclined exhaust holes 25 and 25a is exhausted to both side exhaust holes 4a and 4b below the cylinder 20, and one side exhaust hole 4a is chamfered as shown in FIGS. The air is exhausted widely under the base frame 2 provided with the cutter 8, and the air exhausted through the exhaust hole 4b on the other side is injected directly to the chamfering cutter 8 through the air injection port 43, and the chamfering cutter 8 ) Blows the chip generated when cutting the iron plate and cools the chamfering cutter 8, and the air discharged under the air injection hole 26 formed on the left side of the base frame 2 is chamfered cutter. The chip cut and flung by (8) is quickly discharged to the side.

As the rotor 38 rotates inside the vane type air motor 30 in the process of moving air as described above, the drive gear 5 installed on the lower shaft of the rotor rotates, and the drive gear 5 is rotated. Is engaged with the driven gear 6 installed on the cutter shaft (7) to rotate the cutter shaft (7), the chamfering cutter (8) is installed on the lower end of the cutter shaft (7) to rotate the steel plate The edge of the chamfering will be processed.

As shown in FIG. 7, in the present invention, inclined exhaust holes 25 and 25a are formed to be inclined inside both sides of the cylinder 20, and the exhaust ports 33 are in communication with upper and lower portions of the inclined exhaust holes 25 and 25a, respectively. When the flow path is connected to the outer space 35 and the exhaust holes 4a and 4b at a gentle inclination angle, air is exhausted from the exhaust port 33 to the inclined exhaust holes 25 and 25a, and the inclined exhaust hole 25 The resistance is minimized in the flow path exhausted from the 25a to the exhaust holes 4a and 4b so that the air exhausted to the outside through the inclined exhaust holes 25 and 25a is quickly exhausted.

As air is exhausted from the exhaust port 33 to the inclined exhaust holes 25 and 25a as described above, the rotor 38 of the vane type air motor 30 is rapidly rotated as the resistance is rapidly exhausted. The rotational force of 8) is increased so that the cutting force is increased.

Therefore, in the present invention, the flow path is formed to be sharply bent at a right angle so that when the air is exhausted, the resistance is large and the rotational force of the chamfering cutter 8 is weakened, thereby solving the problem.

In addition, in the present invention, the cutting device unit 50 has an arrow-shaped indication display unit 52 formed on the upper outer periphery of the casing 51 installed on the gear box 4 as shown in FIGS. 4 and 6. The upper and lower ends of the handle 53 and the chamfering cutter 8 are respectively provided, and the female shaft and the screw type are formed on the inner circumference of the casing 51 in the cutter shaft 7 in which the driven gear 6 is installed in the middle. As the male screw portion is fastened to the upper portion of the cutting device 50, the user can easily check the indication display portion 52 and the scale display portion 54.

If you want to adjust the height of the chamfering cutter (8) in this state by pulling the handle 53 exposed to the outside of the automatic chamfering machine 100 by hand, the portion marked with the graduation indicator (54) is turned to the scale Ascending and descending height of the chamfering cutter 8 can be adjusted while visually confirming the display part 54 and the indication display part 52 directly, and a male thread part of the casing 51 of the cutter shaft 7 provided with the handle 53 was installed. It is to be fastened in the inner periphery of the female portion formed by screwing type so that the elevating height of the chamfering cutter (8) according to the direction of turning the handle 53 can be easily adjusted as desired by the user.

Thus, as the height of the chamfering cutter 8 can be easily adjusted, it is possible to freely adjust the size of the chamfering angle by the chamfering cutter 8 to execute excellent chamfering work.

1: compressor 2: base frame 3: case
4 gear box 5 drive gear 6 driven gear
7: cutter shaft 8: chamfering cutter 9: wheel
10: drive unit 20: cylinder 21: drive unit casing
22: connector 23: upper cap 24: air inlet
25: inclined exhaust hole 26: air injection hole 27: injection hole installation hole
30: vane-type air motor 31: eccentric cylinder 32: air supply
33: exhaust port 34: internal space 35: external space
36: vane groove 37: vane 38: rotor
39: upper shaft support 40: lower shaft support 41: elbow
42: air discharge pipe 43: air injection port 50: cutting device
51 casing 52 indicator display portion 53 handle
54: scale display 100: automatic chamfering

Claims (4)

A magnet 9a, a wheel 9, a chamfering cutter 8, and an air jet hole 43 for injecting the chamfering cutter 8 side are installed in the lower part of the base frame 2,
Above the base frame 2 is a well-known be formed so that the air supply port 32 and the exhaust port 33 penetrates in and out at intervals in the circumferential direction on the wall inside the cylinder 20 forming a space therein. A recognition air motor 30 is installed, and the cylinder 20 has a cylindrical tubular drive casing 21 which is vertically installed on the gear box 4 and a nut shape on the top of the drive casing 21. A driving device unit 10 connected to the connector 22 and having an upper cap 23 formed with an air inlet 24 through which air is introduced from one side of the air tank;
Cutter shaft (7) in which the chamfering cutter (8), which is rotated by receiving the driving force of the known vane type air motor (30) and is rotated, is provided with a female thread formed on the inner circumference of the casing (51) and screwed. Cutting device unit 50 is provided with a male thread to be fastened,
And a drive gear (5) rotating by the power generated by the drive unit (10). In the autoplate chamfering machine for iron plate in which the gearbox 4 which accommodates the driven gear 6 which meshes with this drive gear 5 is installed,
Exhaust holes 4a and 4b are formed to penetrate up and down in the gear box 4,
Both sides of the cylinder 20 are inclined exhaust holes to allow the air flowing into the air inlet 24 to be exhausted to both side exhaust holes (4a, 4b) of the gear box 4 through the vane-type air motor (30) 25 and 25a are formed to be inclined downward, and inner portions of the inclined exhaust holes 25 and 25a are formed to communicate with the outer space 35 and the base frame 2 corresponding to the exhaust holes 4a and 4b. The air injection hole 26 and the injection hole installation hole 27 is formed in each,
The inclined exhaust holes 25 and 25a are formed with a plurality of small inner diameters separated in the same direction, and the spaces between the inclined exhaust holes 25 and 25a are smaller than the inner diameters of the inclined exhaust holes 25 and 25a. Automated chamfering machine for iron plate. delete delete The method of claim 1,
The cutting device 50 has an arrow-shaped indicator display portion 52 formed on the upper outer periphery of the casing 51 installed on the gear box 4, the handle is fixed to the upper portion of the cutter shaft (7) The lower outer periphery of (53) is the automatic chamfering machine for iron plate, characterized in that the graduation display portion 54 is formed.

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