KR102383705B1 - Portable boring machine - Google Patents

Abstract

The present invention discloses a portable boring machine. Specifically, a boring bar rotating by being inserted into the tapered keyhole formed in the rudder of a ship, a driving unit for driving the rotation of the boring bar, and the outer peripheral surface of the boring bar are provided so as to be reciprocally transferred along the longitudinal direction and to be equipped with a cutting tool In the boring machine for processing the inner peripheral surface of the keyhole, the boring bar comprises a tool holder capable of reciprocating the tool holder and a feeding part for reciprocating the tool holder, wherein the boring bar has a rectangular cross-section, one side is formed as a horizontal surface, and the other side is tapered It is formed of an inclined surface having the same inclination angle as the inclination angle of the keyhole, and a horizontal sliding guide and an inclined sliding guide are installed on the horizontal surface and the inclined surface, respectively.

Description

Portable boring machine {Portable boring machine}

The present invention relates to a boring machine, and more particularly, to a portable boring machine capable of boring and moving the inner diameter of a keyhole of a ship.

In general, a boring machine is a device that completes or enlarges the machining of a hole drilled with a drill or an inner hole made in forging.

The principle of boring is similar to that of lathes, but in general, the method of cutting by fixing the workpiece and performing the feeding motion and rotating the boring tool is mainly used.

These boring machines are widely used for boring in shipyards, construction sites, and various large machines. Usually, a lot of hole processing is performed in shipyards, and for example, it is widely used for various hinges and various locking holes for ships.

In particular, in the rudder of the ship, the inner diameter of the taper hole also needs to be bored. Conventionally, an axial manual feed screw with a gradient matching the desired taper hole is applied to the boring bar of a general-purpose large boring machine fixed close to the key installation table in the processing place. After attaching a cutting tool rest that can move in the axial direction through This is performed by rotating the boring bar while moving the cutting tool rest in the axial direction through a method in which the cutting tool held in the cutting tool rest is rotated around the axis once.

However, due to the limitations of manual operation and the need to transport the ship's key to the place where the equipment is installed, the cost and time required for transportation and work were consumed a lot.

In order to solve this problem, a movable boring machine has been proposed as in the prior art below, but since it has a circular boring bar structure, it is difficult to implement a structure for guiding the feed of the tool holder on the outer peripheral surface of the boring bar.

In addition, there was a problem in that the bending of the boring bar occurred during boring processing, and the straightness of the tool holder was lowered, so that the processing precision was significantly reduced.

In addition, there was a disadvantage in that it was difficult to insert and withdraw the equipment for measuring the inner diameter with the boring bar inserted into the keyhole.

Republic of Korea Patent Registration 10-1461377 (2014.11.7.) "Moveable Boring Machine" Republic of Korea Patent Publication 10-2005-0077467 (Aug.

Accordingly, the present invention is to solve the above problems, and an object of the present invention is to provide a portable boring machine using a boring bar having a square cross section.

A portable boring machine according to the present invention for achieving the above object includes a boring bar which is inserted into and rotates in a tapered keyhole formed in a rudder of a ship, a driving unit for driving the rotation of the boring bar, and a length on the outer circumferential surface of the boring bar In the boring machine for machining the inner circumferential surface of the keyhole, comprising: a tool holder that is provided reciprocally along the direction and can mount a cutting tool; and a feeding part that reciprocates the tool holder; the boring bar has a square cross section However, one side is formed as a horizontal surface, and the other side is formed as an inclined surface having the same inclination angle as the inclination angle of the tapered keyhole, and a horizontal sliding guide and an inclined sliding guide may be installed on the horizontal surface and the inclined surface, respectively.

And it is preferable that one or more through-holes are formed on both sides of the boring bar to enable movement of the equipment for checking the inner diameter of the keyhole.

Here, the inclined sliding guide is installed along the longitudinal direction of the inclined surface, a concave inclined groove is formed on the upper surface, and an inclined dovetail having inclined locking jaws formed on both sides thereof; an inclined block inserted into the inclined groove; It consists of an inclined screw that is screwed through the block, and a light chain that is coupled to the inclined block and is reciprocally slidably transported along the inclined surface with both ends caught on the inclined engaging jaw,

The horizontal sliding guide is installed along the longitudinal direction of the horizontal plane, a concave horizontal groove is formed on the upper surface, and a horizontal dovetail having horizontal locking projections formed on both sides thereof, a horizontal block inserted into the horizontal groove, and the horizontal block It may be made of a horizontal screw that is screwed through and coupled to the horizontal block, and a horizontal slider that is coupled to the horizontal block and is reciprocally slidably transferred along the horizontal plane with both ends hooked on the horizontal locking jaw.

In addition, the driving unit includes a rotating shaft coupled to one end of the boring bar, a rotating casing coupled to the rotating shaft and having gear teeth formed on an outer circumferential surface, a driving gear box interlocked with the rotating casing, and a driving motor coupled to the driving gear box. can be made with

In addition, the feeding part includes a horizontal feeding shaft passing through one edge of the rotation shaft and having one end interlocking with the end of the horizontal screw, and an inclined feeding shaft passing through the other edge of the rotation shaft and having one end interlocked with the end of the inclined screw. And, an auxiliary gear box interlocking with the other ends of the inclined feeding shaft and the horizontal feeding shaft and selectively interlocking only one of the inclined feeding shaft and the horizontal feeding shaft, and a feeding gear box coupled to the auxiliary gear box, the feeding gear box It may be made of a feeding motor coupled to.

According to the present invention described above, there are the following effects.

First, since it is easier to install the sliding guide compared to the conventional boring bar having a circular cross section, the straightness is excellent when the light chain or horizontal slider is moved, so the cutting surface can be formed very uniformly.

Second, since a boring bar with a square cross section is used, bending, bending, or vibration is greatly reduced, so processing precision is greatly improved.

Third, since a space is secured between the boring bar having a square cross section and the inner circumferential surface of the keyhole, it is easy to insert and withdraw equipment for measuring the inner diameter, and since a through hole is formed, it is easy to measure the inner diameter.

1 is a cross-sectional view showing the shape of a keyhole of a general ship
2 is a cross-sectional view showing the overall structure of a portable boring machine according to an embodiment of the present invention;
3 is a longitudinal cross-sectional view of the present invention shown in FIG.
4 is an enlarged cross-sectional view of the feeding part of the present invention shown in FIG.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. And, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

1 is a cross-sectional view showing the shape of a keyhole of a general ship.

In general, the ship's rudder (rudder) is formed with a keyhole (kh) for mounting on the rudder shaft, the keyhole (kh) has a tapered inner diameter so that the inner diameter gradually decreases as shown in FIG. In general, the taper slope is 1/15.

For boring such a tapered inner diameter, the cutting tool must have a structure that can move along the tapered inner diameter while rotating.

The present invention relates to a portable boring machine capable of cutting the inner diameter of the key hole (kh) by inserting it into a tapered key hole (kh) formed in the rudder of a ship while having a movable structure. , the driving unit 200 , the tool holder 300 and the feeding unit 400 may be included.

FIG. 2 is a cross-sectional view showing the overall structure of a portable boring machine according to an embodiment of the present invention, and FIG. 3 is a longitudinal cross-sectional view of the present invention shown in FIG. 2 .

First, the boring bar 100 will be described.

The boring bar 100 is inserted into the key hole kh in the longitudinal direction to rotate, and has a long bar shape.

And, the boring bar 100 is conventionally made of a circular cross-section, but in the present invention is a square bar shape having a square cross-section.

Accordingly, the boring bar 100 has four sides, one side is formed as a horizontal surface 110 , and the other side, that is, the opposite side to the horizontal surface 110 , is formed of an inclined inclined surface 120 .

Specifically, the inclination angle of the inclined surface 120 has the same inclination angle as the inclination angle of the tapered keyhole kh. Accordingly, when the boring bar 100 is inserted into the key hole kh, the inclined surface 120 and the inner peripheral surface of the key hole kh are parallel.

In addition, a tool holder 300 is mounted on the horizontal surface 110 along the longitudinal direction, and a horizontal sliding guide 130 capable of horizontally reciprocating is installed, and the inclined surface 120 has a tool holder 300 along the longitudinal direction. ) is installed and the inclined sliding guide 140 that can reciprocate on the slope is installed.

In detail, the inclined sliding guide 140 may include an inclined dovetail 141 , an inclined block 142 , an inclined screw 143 , and a light chain rider 144 .

The inclined dovetail 141 is installed along the longitudinal direction on the inclined surface 120. An inclined groove 141a concave in the center is continuously formed along the longitudinal direction, and both sides of the inclined groove 141a. The inclined locking jaw 141b inclined to the inside is formed.

In addition, the inclined block 142 is custom-inserted into the inclined groove 141a so as to be movable along the inclined groove 141a.

In addition, a light chain rider 144 is seated on the upper surface of the inclined dovetail 141. The light chain rider 144 is coupled to the inclined block 142, and both ends are caught on the inclined locking jaw 141b. It reciprocates and slides along the inclined surface in a state in which it does not depart.

In addition, an inclined screw 143 is installed in the inclined groove 141a. At this time, the inclined screw 143 is screwed to each other while passing through the inclined block 142 .

Accordingly, the inclined block 142 is horizontally moved by the rotation of the inclined screw 143, and the light chain 144 coupled to the inclined block 142 is reciprocated.

Similarly, the horizontal sliding guide 130 may include a horizontal dovetail 131 , a horizontal block 132 , a horizontal screw 133 , and a horizontal slider 134 .

The horizontal dovetail 131 is installed along the longitudinal direction on the horizontal surface 110, and a horizontal groove 131a concave in the center is continuously formed along the longitudinal direction, and both sides of the horizontal groove 131a. The inwardly inclined horizontal locking jaw (131b) is formed.

And a horizontal block 132 is custom-inserted into the horizontal groove 131a, so that it can move along the horizontal groove 131a.

In addition, a horizontal slider 134 is seated on the upper surface of the horizontal dovetail 131, the horizontal slider 134 is coupled to the horizontal block 132, and both ends are caught by the horizontal locking jaw 131b. The reciprocating sliding movement is performed along the horizontal plane 110 in a state in which it does not depart.

In addition, a horizontal screw 133 is installed in the horizontal groove 131a. At this time, the horizontal screw 133 is screwed to each other while passing through the horizontal block (132).

Accordingly, the horizontal block 132 is horizontally moved by the rotation of the horizontal screw 133 , and the horizontal slider 134 coupled to the horizontal block 132 is reciprocated.

In the case of the conventional boring bar having a circular cross section, it was difficult to install the horizontal sliding guide 130 or the inclined sliding guide 140, but this problem is solved by using the boring bar 100 having a square cross section in the present invention.

And the boring bar 100 of a square cross-section is stronger in bending than a boring bar of a circular cross-section. Therefore, the bending of the boring bar 100 hardly occurs during processing.

In addition, since the sliding guide is used, the straightness is excellent when the light chain slider 144 or the horizontal slider 134 moves, so that the cutting surface can be formed very uniformly.

On the other hand, it is preferable that one or more through-holes 150 are formed at regular intervals on both sides of the boring bar 100 , that is, on both surfaces except for the horizontal surface 110 and the inclined surface 120 .

The through hole 150 reduces the weight of the boring bar 100 and at the same time facilitates the movement of equipment for checking the inner diameter of the key hole (kh).

Because, during boring processing, the equipment is introduced into the key hole (kh) to check the inner diameter. It was not easy, and in order to measure the inner diameter, the boring bar 100 had to be taken out and then measured.

However, since the boring bar 100 has a rectangular cross section, a space can be secured between the boring bar 100 and the inner peripheral surface of the key hole (kh), so that equipment can be easily introduced, and since the through hole 150 is provided, the boring bar 100 ), there is an advantage in that it is easy to measure the inner diameter across the through hole 150 without drawing out.

Next, the driving unit 200 for rotationally driving the boring bar 100 will be described.

The driving unit 200 may be largely configured to include a rotating shaft 210 , a rotating casing 220 , a driving gear box 230 , and a driving motor 240 .

The rotation shaft 210 is coupled to one end of the boring bar 100 , and is a circular shaft, and the boring bar 100 is rotationally driven by the rotation of the rotation shaft 210 .

And the rotating casing 220 is coupled to the outer circumferential surface of the rotating shaft 210 . In other words, the rotation shaft 210 is accommodated in the inside of the rotation casing 220, may be keyed or spline-coupled to each other to rotate together.

At this time, gear teeth are formed on the outer peripheral surface of the rotating casing 220 .

The gear teeth of the rotating casing 220 are interlocked with the driving gearbox 230 , and the driving motor 240 is coupled to the driving gearbox 230 .

Accordingly, when the rotating casing 220 rotates through the driving of the driving motor 240 and the appropriate deceleration of the driving gearbox 230 , the rotating shaft 210 rotates, thereby causing the boring bar 100 to rotate. will be driven by rotation.

Next, the tool holder 300 mounted on the boring bar 100 will be described.

The tool holder 300 is capable of mounting a cutting tool for boring, and is movably installed on the inclined surface 120 or the horizontal surface 110 of the boring bar 100 .

To this end, the tool holder 300 is mounted on the light chain slider 144 of the inclined sliding guide 140 or the horizontal slider 134 of the horizontal sliding guide 130 .

Accordingly, the tool holder 300 may be transported by the reciprocating transport of the light chain slider 144 or the horizontal slider 134 .

For reference, the tool holder 300 mounted on the light chain slider 144 preferably has a structure capable of adjusting the distance and inclination of the cutting tool and the inner peripheral surface of the key hole kh, and is mounted on the horizontal slider 134 . Preferably, the tool holder 300 to be used has a structure capable of adjusting the distance between the cutting tool and the inner circumferential surface of the key hole kh.

Next, a feeding unit 400 capable of reciprocating the tool holder 300 will be described with reference to FIG. 4 . 4 is an enlarged cross-sectional view of the feeding unit of the present invention shown in FIG.

The feeding unit 400 may be largely configured to include a horizontal feeding shaft 410 , an inclined feeding shaft 420 , an auxiliary gear box 430 , a feeding gear box 440 , and a feeding motor 450 .

The horizontal feeding shaft 410 is installed through one edge of the rotation shaft 210 , and one end is interlocked with the end of the horizontal screw 133 to rotate the horizontal screw 133 .

To this end, a horizontal feeding gear 411 is coupled to one end of the horizontal feeding shaft 410 , and a horizontal screw gear 412 is coupled to an end of the horizontal screw 133 , and the horizontal feeding gear 411 and The horizontal screw gear 412 may be toothed to each other.

And the inclined feeding shaft 420 is installed through the other edge of the rotary shaft 210, that is, the opposite edge of the horizontal feeding shaft 410, and one end is interlocked with the end of the inclined screw 143. The inclined screw 143 is rotated.

To this end, an inclined feeding gear 421 is coupled to one end of the inclined feeding shaft 420 , and an inclined screw gear 422 is coupled to an end of the inclined screw 143 , and the inclined feeding gear 421 and The inclined screw gear 422 may be toothed to each other. However, since the inclined feeding shaft 420 and the inclined screw 143 are inclinedly interlocked, the inclined screw gear 422 and the inclined screw 143 may be inclinedly jointly coupled.

In addition, the auxiliary gearbox 430 is coupled to the other end of the horizontal feeding shaft 410 and the inclined feeding shaft 420 .

The auxiliary gearbox 430 is for selectively interlocking the power transmitted from the feeding gearbox 440 to only one of the horizontal feeding shaft 410 and the inclined feeding shaft 420 .

To this end, the auxiliary gear box 430 is provided with a horizontal interlocking gear 431 coupled to the horizontal feeding shaft 410 , and an inclined interlocking gear 432 coupled to the inclined feeding shaft 420 , and the Between the horizontal interlocking gear 431 and the inclined interlocking gear 432 , a transmission gear 433 interlocked with the feeding gear box 440 is provided so as to be able to move forward and backward.

In addition, the feeding gear box 440 is coupled to the auxiliary gear box 430 , and the feeding motor 450 is coupled to the feeding gear box 440 . Here, the feeding gear box includes a differential device.

Accordingly, the horizontal feeding shaft 410 or the inclined feeding shaft is driven by the driving of the feeding motor 450 and appropriate deceleration of the feeding gear box 440 including the differential device, and the shifting of the auxiliary gear box 430 . Any one of (420) is rotated.

Hereinafter, the operation process of the present invention will be briefly described.

The boring bar 100 is inserted into the inner diameter of the key hole kh, and the boring bar 100 is fixed by using a support bearing 500 coupled to the end of the boring bar 100 to fix it to the inner diameter of the key hole kh. do.

When the driving motor 240 is driven to rotate the boring bar 100 slowly at a constant speed, and the feeding motor 450 is driven to rotate the inclined screw 143, the light chain 144 is formed on the inclined surface ( 120) is followed.

Accordingly, the cutting tool fixed to the tool holder 300 mounted on the light chain rider 144 bores the inner diameter of the keyhole kh by a combination of the rotation of the boring bar 100 and the linear movement of the light chain rider 144 . will be processed

Although a representative embodiment of the present invention has been described above with reference to the drawings, those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above content. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims described below as well as the claims and equivalents.

100: boring bar 110: horizontal plane
120: inclined surface 130: horizontal sliding guide
131: horizontal dovetail 131a: horizontal groove
131b: horizontal locking jaw 132: horizontal block
133: horizontal screw 134: horizontal slider
140: inclined sliding guide 141: inclined dovetail
141a: inclined groove 141b: inclined locking jaw
142: inclined block 143: inclined screw
144: light chain rider 150: through hole
200: drive unit
210: rotating shaft 220: rotating casing
230: drive gear box 240: drive motor
300: tool holder
400: feeding unit
410: horizontal feeding shaft 411: horizontal feeding gear
412: horizontal screw gear 420: inclined feeding shaft
421: inclined feeding gear 422: inclined screw gear
430: auxiliary gear box 431: horizontal interlocking gear
432: inclined interlocking gear 433: transmission gear
440: feeding gear box 450: feeding motor
500: support bearing
kh: keyhole

Claims (5)

a boring bar which is inserted into the tapered keyhole formed in the rudder of the ship and rotates; A rotary shaft coupled to one end of the boring bar, a rotary casing coupled to the rotary shaft and having gear teeth formed on an outer circumferential surface, a drive gear box interlocked with the rotary casing, and a drive motor coupled to the drive gear box, the boring bar a driving unit for driving the rotation of the; In a boring machine for machining the inner circumferential surface of the key hole, it is provided on the outer circumferential surface of the boring bar so as to be reciprocally transported along the longitudinal direction and includes a tool holder capable of mounting a cutting tool, and a feeding part for reciprocating the tool holder,
The boring bar has a rectangular cross section, one side is formed as a horizontal surface, and the other side is formed as an inclined surface having the same inclination angle as the inclination angle of the tapered keyhole, and a horizontal sliding guide and an inclined sliding guide are provided on the horizontal surface and the inclined surface, respectively. installed, and on the other two surfaces except for the horizontal surface and the inclined surface, one or more through-holes that enable the movement of the equipment for checking the inner diameter of the keyhole are formed,
The inclined sliding guide is installed along the longitudinal direction of the inclined surface, a concave inclined groove is formed on the upper surface, and an inclined dovetail having inclined locking jaws formed on both sides thereof, an inclined block inserted into the inclined groove, and the inclined block. It consists of an inclined screw that is screw-coupled while passing through, and a light chain that is coupled to the inclined block and is reciprocally slidably transported along the inclined surface with both ends caught on the inclined engaging jaw,
The horizontal sliding guide is installed along the longitudinal direction of the horizontal plane, a concave horizontal groove is formed on the upper surface, and a horizontal dovetail having horizontal locking projections formed on both sides thereof, a horizontal block inserted into the horizontal groove, and the horizontal block It consists of a horizontal screw that is screw-coupled while passing through, and a horizontal slider that is coupled to the horizontal block and is reciprocally slidably transported along the horizontal plane with both ends caught on the horizontal locking jaw,
The feeding unit includes a horizontal feeding shaft that passes through one edge of the rotation shaft and one end interlocks with the end of the horizontal screw, and an inclined feeding shaft that passes through the other edge of the rotation shaft and has one end interlocked with the end of the inclined screw, An auxiliary gear box interlocking with the other ends of the inclined feeding shaft and the horizontal feeding shaft and selectively interlocking only one of the inclined feeding shaft and the horizontal feeding shaft, a feeding gear box coupled to the auxiliary gear box, and the feeding gear box A portable boring machine, characterized in that it consists of a feeding motor. delete delete delete delete

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