KR101432531B1 - Multiple spindle drilling machine - Google Patents

Abstract

The present invention discloses a multi-axis drilling machine that improves the operation of a plurality of bolt holes in a flange at a time, wherein the multi-axis drilling machine includes a drive motor; A driving box for decelerating the driving force of the driving motor to transmit the driving force to the main shaft; A link box including a plurality of spindles gear-coupled to the main shaft and the main shaft, a length adjusting groove formed at an end of the plurality of spindles, and a plurality of spindles driven by the main shaft, the plurality of spindles being driven; A plurality of shanks coupled to the length adjustment groove of each of the spindles of the link box at an adjusted position so as to be adjustable in length; A plurality of drills respectively coupled to the plurality of shanks and machining the bolt holes in the flanges; A chuck for receiving a flange on a lower table on which a plurality of said drills are disposed; A hydraulic cylinder for lowering said chuck to load said flange and for lifting said chuck to machine said bolt hole in said flange; And a clamping unit having a clamper rotated in conjunction with a rising / falling of the chuck and fixing the flange in conjunction with lifting and lowering of the chuck.

Description

[0001] MULTIPLE SPINDLE DRILLING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis drilling machine, and more particularly, to a multi-axis drilling machine in which a plurality of bolt holes are formed in a flange so as to be operable at one time.

Flange is a mechanical material used to join or reinforce pipe joints or parts.

The flange is manufactured by a casting method in which a metal casting is injected into a mold and solidified to form a predetermined shape, and 70 to 80% of the total production amount is used in the ship, plant industry, and machinery industry.

Generally, the flange has a structure in which a through hole is formed at the center and a bolt hole is formed for fastening the bolt to the peripheral edge.

The through hole at the center of the flange is formed by the mold during casting, and the bolt hole is drilled by drilling.

The bolt hole of the flange is generally machined using a single module drill. To drill the bolt hole at the designed position, the drill is moved by dimension control or the flange is dimensionally controlled and rotated .

It is common for a flange to have a plurality of bolt holes formed therein, and these bolt holes must be formed in the correct position for assembly.

Therefore, a conventional method of machining a plurality of bolt holes in a flange with a single module has a problem in that it is difficult to form a bolt hole at an accurate position, and reliability is low.

Also, when a plurality of bolt holes are machined on a flange with a single module as in the conventional method, it takes a long time to manufacture the flange, so that productivity is lowered and mass production is difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a multi-axis drill machine capable of forming a plurality of spindles at predetermined positions and drilling a plurality of bolt holes into precise positions on a flange.

Another object of the present invention is to provide a multi-axis drill machine capable of shortening a manufacturing time and improving productivity by simultaneously machining a plurality of bolt holes on a flange.

Another object of the present invention is to provide a multi-axis drill machine capable of easily adjusting and fixing the height of a drill by installing a drill for machining a plurality of bolt holes in a flange using a shank adjustable in length.

A multi-axis drilling machine according to the present invention comprises a drive motor; A driving box for decelerating the driving force of the driving motor to transmit the driving force to the main shaft; A link box including a plurality of spindles gear-coupled to the main shaft and the main shaft, a length adjusting groove formed at an end of the plurality of spindles, and a plurality of spindles driven by the main shaft, the plurality of spindles being driven; A plurality of shanks coupled to the length adjustment groove of each of the spindles of the link box at an adjusted position so as to be adjustable in length; A plurality of drills respectively coupled to the plurality of shanks and machining the bolt holes in the flanges; A chuck for receiving a flange on a lower table on which a plurality of said drills are disposed; A hydraulic cylinder for lowering said chuck to load said flange and for lifting said chuck to machine said bolt hole in said flange; And a clamping unit having a clamper rotated in conjunction with a rising / falling of the chuck and fixing the flange in conjunction with lifting and lowering of the chuck.

Here, the drive box includes: a main timing pulley shaft axially connected to the drive motor and having a main timing pulley; A driving shaft having a driving pulley and connected to the main shaft; A deceleration timing shaft having a first reduction pulley having a larger rotation ratio than the main timing pulley and a second reduction pulley having a diameter smaller than that of the first reduction pulley; A first timing belt fastened between the main timing pulley and the first reduction pulley; And a second timing belt coupled between the second reduction pulley and the drive pulley.

The link box includes an upper block coupled to a bottom surface of the drive box; A lower block spaced apart from the upper block; A connecting body coupling the upper block and the lower block and forming a receiving space inside the upper block; A main shaft having a main shaft gear formed in the accommodating space and connected to the driving shaft through the main shaft; And a plurality of spindles supported on the upper block and having the spindle gear and the gear-engaged spindle gear, wherein the upper bearing includes first bearing members for supporting rotation of the spindle and the plurality of spindles, .

Here, the lower block of the link box may include the second bearing members for supporting the rotation of the shank in the region through which the shanks pass, for each of the plurality of spindles.

Preferably, the second bearing members include a combination of a ball bearing and a thrust bearing.

One end of the plurality of shanks coupled with the spindle is formed with a step or taping to be coupled with the length adjusting groove and the other end coupled with the drill may be formed with a coupling groove for coupling the end of the drill .

The clamping unit may include a hinge unit disposed at a periphery of the chuck and transmitting a rotational force to the clamper; And a clamper hinged to the hinge portion and rotated by a rotational force transmitted from the hinge portion. The clamper is rotated to a position where the clamper is bent with respect to the hinge portion as the chuck is lifted, The clamper pivots to a position where the clamper extends from the hinge portion according to the descent, thereby releasing the fixing of the flange.

Therefore, according to the present invention, a plurality of spindles can be installed at predetermined positions, and a plurality of bolt holes can be simultaneously machined on the flange at precise positions, thereby shortening the manufacturing time and improving the productivity.

In addition, according to the present invention, the length of the shank can be adjusted, and the position of the drill for machining a plurality of bolt holes on the flange can be easily adjusted and fixed.

1 is a side view showing a preferred embodiment of a multi-axis drilling machine according to the present invention;
Fig. 2 is a schematic view for explaining a fastening relationship of the timing belt of Fig. 1; Fig.
3 is an enlarged cross-sectional view of a portion A in Fig.
Fig. 4 is a view for explaining the engagement state of the shank in the portion B in Fig. 3; Fig.
Figs. 5 to 7 are views for explaining loading and unloading of flanges on a chuck; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the terminology used herein is for the purpose of description and should not be interpreted as limiting the scope of the present invention.

The embodiments described in the present specification and the configurations shown in the drawings are preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention and thus various equivalents and modifications Can be.

The multi-axis drilling machine according to the present invention may be constructed as a structure in which the table 10 and the frame 12 are coupled as shown in FIG.

First, the table 10 is for loading or unloading the flange 100 to be described later. The drive box 14 is disposed above the table 10 and the drive box 14 and the table 10 Are supported by the side frame 12.

The spaced space between the drive box 14 and the table 10 is used as a space in which the bolt hole is machined while the flange 100 is loaded and unloaded and the flange 100 is loaded.

A drive motor 16 is formed above the drive box 14, and a link box 18 is formed below the drive box 14.

In the above-described configuration, the drive box 14 includes a combined structure of the timing belts and the shafts formed with pulleys for reducing the driving force of the drive motor 16 and transmitting it to the main shaft.

More specifically, the drive box 14 includes a main timing pulley shaft 22 having a main timing pulley 20, a drive shaft 26 having a drive pulley 24, a first reduction pulley 28, The deceleration timing axis 32, the first timing belt 34 and the second timing belt 36 in which the second deceleration pulley 30 is formed are constituted.

The main timing pulley shaft 22 is connected to the shaft of the drive motor 16 through the drive box 14 and is configured to receive the rotational force of the drive motor 16. [

The main timing pulley 20 of the main timing pulley shaft 22 is then engaged with the first reduction pulley 28 of the decel timing shaft 32 as the first decel timing belt 34.

The first reduction pulley 28 of the reduction timing axis 32 is configured to have a rotation ratio greater than that of the main timing pulley 20 and the second reduction pulley 28 has a diameter larger than that of the first reduction pulley 28 It can be composed of small. Here, the first reduction pulley 28 of the deceleration timing axis 32 has a rotation ratio greater than that of the main timing pulley 20 because the main timing pulley 20 is of N (where N is a positive integer greater than 1, Means that the first reduction pulley 28 of the reduction timing axis 32 rotates once during the rotation of the reduction timing axis 32. The above rotation ratio means that the diameter of the first reduction pulley 28 of the reduction timing axis 32 is set at the main timing And the pulley 20 may be formed larger than the pulley 20.

The deceleration timing axis 32 rotates at a slower rotational speed than that transmitted from the main timing pulley shaft 22 through the first timing belt 34 and transmits the decelerated driving force to the driving shaft 26 .

The drive pulley 24 of the drive shaft 26 is then coupled to the second reduction pulley 30 of the deceleration timing axis 32 with the second timing belt 36.

The driving shaft 28 is transmitted with a decelerated driving force by the deceleration timing axis 32 by fastening through the second timing belt 36. [

In the above configuration, the main timing pulley shaft 22, the deceleration timing shaft 32, and the drive shaft 24 are vertically installed.

The main timing pulley shaft 22 is engaged with the shaft of the drive motor 16 and the deceleration timing shaft 32 is supported at the upper portion or the lower portion or the upper and lower portions of the drive box 14 to be freely rotatable.

The driving shaft 24 has a structure in which the upper end is rotatable to the driving box 14 and the lower end is engaged with the end of the main shaft 40 extending through the driving box 14 and extending inward. The driving shaft 24 has a function of being coupled with the main shaft 40 and transmitting rotational force to the main shaft 40 as described above.

The main shaft 40 is constituted in the link box 42 and the link box 42 is constituted in the lower part of the drive box 14 to transfer the driving force to the plurality of shanks 44 constituting the lower part .

The structure of the link box 42 will be described with reference to FIG.

The link box 42 includes a spindle 40 and a plurality of spindles 46 and 48 which are gear-coupled to the spindle 40.

As described above, the link box 42 including the main shaft 40 and the spindles 46 and 48 includes an upper block 50 coupled to the bottom of the drive box 14, A lower block 52 and a connecting body 54 which connects the upper block 50 and the lower block 52 and forms a receiving space on the inner side.

A coupling between the upper block 50 and the coupling body 54 and a coupling between the upper block 50 and the coupling block 54 and the lower block 52 ) May be constituted by fastening using a bolt.

The main shaft 40 has a main shaft gear 56 and one end passes through the upper block 50 and the drive box 14 and is coupled to the drive shaft 24 in the drive box 14 to receive rotational force.

At this time, it is preferable that a bearing member 62, such as a ball bearing, capable of supporting the rotation of the main shaft 40 is formed in the through hole through which the main shaft 40 of the upper block 50 passes.

The spindle gears 58 and 60 of the spindles 46 and 48 constitute spindles 46 and 48 having spindle gears 58 and 60 formed at a plurality of positions which are uniformly spaced from the main spindle 40, And is gear-engaged with the main shaft gear 56 of the main shaft 40.

The spindles 46 and 48 are fixed through the upper block 50 and support the rotation of the spindles 46 and 48 such as ball bearings in the through holes through which the spindles 46 and 48 of the upper block 50 pass. It is preferable that the bearing member 65 is formed.

In the embodiment of the present invention, a pair of spindles 46 and 48 are illustrated, but the present invention is not limited thereto, and a plurality of spindles 46 and 48 may be formed around the main spindle 40 corresponding to the number of the bolts formed in the flange 100 A spindle can be constructed.

The rotational force of the main shaft 40 is transmitted to the spindles 46 and 48 by the gear engagement between the spindle gears 58 and 60 and the main shaft gear 56 as described above, And transmits rotational force to the shank 44 to be engaged.

The spindles 46 and 48 are formed with length adjusting grooves 62 and 64 at their ends for engagement with the shank 44. One end of the shank 44 has a gap in the length adjusting grooves 62 and 64 do.

4 (a) and 4 (b) where the shank 44 is engaged, the gap in the length adjusting grooves 62 and 64 can be varied, A length adjustment may be made to adjust the position at which to install the display unit 70.

The shank 44 may be stepped or taped at its ends for engagement with the length adjusting grooves 62, 64.

The shank 44 passes through the lower block 52 and is coupled to the length adjusting grooves 62 and 64 formed at the ends of the spindles 46 and 48. The shank 44 of the lower block 52 is inserted It is preferable that a bearing member 66 for supporting the rotation of the shank 44 is formed.

At this time, it is preferable that the bearing member 66 is configured to support a precise rotation by assembling a ball bearing and a spurster bearing.

Further, the nut 68 is provided at the lower part of which the bearing member 66 is formed, so that the rotation of the shank 44 can be supplementarily supported.

On the other hand, a drill 70 for machining a bolt hole is coupled to the flange 100 at the end of the plurality of shanks 44, respectively.

Here, it is preferable that a shank is formed with a coupling groove 72 for coupling with the drill 70, and a separate auxiliary mechanism for maintaining the state in which the drill 70 is engaged can be additionally provided.

The chuck 80 accommodating the flange 100 is formed on the lower table 10 on which the plurality of drills 70 are disposed as described above and the flange 100 is mounted on the lower portion of the table 10, A hydraulic cylinder 90 for descending the chuck 80 and for lifting the chuck 80 to fabricate the bolt hole in the flange 100 is constructed.

The chuck 80 has a space 82 for accommodating the flange 100 therein and a clamping portion 84 at the periphery thereof.

The clamping portion 84 includes a clamper 86 that is rotated in conjunction with the lifting and lowering of the chuck 80 and a hinge portion 88 that is formed at the periphery of the chuck 80 and transmits a turning force to the clamper 86 .

Here, the clamper 86 is hinged to the hinge portion 88 and is rotated by the rotational force transmitted from the hinge portion 88.

That is, the clamper 86 is pivoted to a position where it is bent with respect to the hinge portion 88 as the chuck 80 is lifted and lowered, thereby fixing the flange 100 and extending along the hinge portion 88 as the chuck 80 descends Position to release the fixation of the flange 100. As shown in Fig.

The rotation of the clamper 86 may be configured to be interlocked with the cylinder axis 92 constituting the hydraulic cylinder 90 and moving up and down the chuck 80. The method of transmitting the rotary force may be variously implemented according to the intention of the manufacturer Therefore, detailed description thereof will be omitted.

6, the flange 100 may be loaded as shown in FIG. 6 in a state where the clamper 86 is vertically rotated to a position extending from the hinge 88 as shown in FIG. 5, When the chuck 80 is lifted in a state in which the flange 100 is loaded, the clamper 86 is rotated to fix the flange 100.

7, when the chuck 80 is lowered, the clamper 86 vertically rotates to a position where the clamper 86 extends from the hinge 88 Thereby allowing the flange 100 to be unloaded.

1 to 7 so that the driving force of the motor 16 can be transmitted to the main shaft 40 and the plurality of spindles 46 and 48 And the drill 70 coupled to the shank 44 is rotated according to the driving of the spindles 46 and 48 so that a plurality of bolts can be simultaneously machined on the flange 100. [

At this time, the positions of the spindles 46 and 48 can be designed corresponding to the positions of the bolt holes to be machined on the flange 100.

Therefore, the present invention can simultaneously process a plurality of bolt holes at precise positions on the flange.

Therefore, according to the present invention, accuracy of forming a bolt hole can be improved, and as a plurality of bolt holes are simultaneously machined, the manufacturing time can be shortened and productivity can be improved.

Further, by providing a drill for machining a plurality of bolt holes using a shank having a length adjustable, the height of the drill corresponding to the flange can be easily adjusted.

10: Table 12: Frame
14: drive box 16: drive motor
20: main timing pulley 22: main timing pulley shaft
24: drive pulley 26: drive shaft
28: first deceleration timing pulley 30: second deceleration timing pulley
32: deceleration timing pulley shaft 34: first timing belt
36: second timing belt 40: spindle
42: link box 44: shank
46, 48: spindle 50: upper block
52: lower block 54:
56: spindle gear 58, 60: spindle gear
62, 64: air gap 65, 66: bearing member
68: Nut 70: Drill
80: Chuck 82: accommodation space
84: clamping part 86: clamper
88: Hinge 90: Hydraulic cylinder
92: cylinder shaft 100: flange

Claims (7)

A drive motor;
A driving box for decelerating the driving force of the driving motor to transmit the driving force to the main shaft;
A link box including a plurality of spindles gear-coupled to the main shaft and the main shaft, a length adjusting groove formed at an end of the plurality of spindles, and a plurality of spindles driven by the main shaft, the plurality of spindles being driven;
A plurality of shanks coupled to the length adjustment groove of each of the spindles of the link box at an adjusted position so as to be adjustable in length;
A plurality of drills respectively coupled to the plurality of shanks and machining the bolt holes in the flanges;
A chuck to receive the flange on a lower table on which a plurality of the drills are disposed;
A hydraulic cylinder for lowering said chuck to load said flange and for lifting said chuck to machine said bolt hole in said flange; And
And a clamping unit having a clamper rotated in conjunction with a rising / falling of the chuck and fixing the flange in conjunction with lifting / lowering of the chuck.
The apparatus according to claim 1,
A main timing pulley shaft axially connected to the drive motor and having a main timing pulley;
A driving shaft having a driving pulley and connected to the main shaft;
A deceleration timing shaft having a first reduction pulley having a larger rotation ratio than the main timing pulley and a second reduction pulley having a diameter smaller than that of the first reduction pulley;
A first timing belt fastened between the main timing pulley and the first reduction pulley; And
And a second timing belt fastened between the second reduction pulley and the drive pulley.
The link box according to claim 2,
An upper block coupled to a bottom surface of the drive box;
A lower block spaced apart from the upper block;
A connecting body coupling the upper block and the lower block and forming a receiving space inside the upper block;
A main shaft having a main shaft gear formed in the accommodating space and connected to the driving shaft through the upper block; And
And a plurality of spindles supported on the upper block and having the spindle gear and the gear-engaged spindle gear,
And wherein the upper block comprises first bearing members for supporting rotation of the spindle and a plurality of the spindles.
The link box according to claim 3, wherein the lower block of the link box comprises:
Wherein each of the shanks passes through a plurality of the spindles and the second bearing members are configured to support the rotation of the shanks in a region through which the shanks pass.
5. The method of claim 4,
Wherein the second bearing members are comprised of a combination of a ball bearing and a thruster bearing.
The apparatus of claim 1,
And a coupling groove for coupling an end of the drill is formed at one end coupled to the spindle, the coupling being formed by a step or taping to be coupled with the length adjusting groove and the other end coupled with the drill.
The clamping apparatus according to claim 1,
A hinge portion formed at a periphery of the chuck and transmitting a rotational force to the clamper; And
And a clamper hinged to the hinge and rotated by a rotational force transmitted from the hinge,
Wherein the clamper pivots to a position where the clamper is bent with respect to the hinge portion in accordance with the raising and lowering of the chuck to fix the flange and to rotate the clamper to a position where the clamper extends from the hinge portion in accordance with the descent of the chuck, machine.

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