KR20020073798A - A horzontal type-milling machine with multy-axis spindles - Google Patents

Abstract

PURPOSE: A horizontal type multiple machines having a multiple spindle is provided to simultaneously process processed objects by using a plurality of cutting tools which are installed at a multiple spindle. CONSTITUTION: An index portion(20) is installed at a main base(10). The index portion(20) includes a table(21) which is rotatively installed on the main base(10) and a jig(23) installed on the table(21). A first carriage(30), a second carriage(40), and a third carriage(50) are movably installed on a main base(10). A first driver(60), a second driver(70), and a third driver(80) drive the first carriage(30), the second carriage(40), and the third carriage(50), respectively. A plurality of driven spindles(92) is rotatively installed at the third carriage(50). A power transmission unit transmits a driving force of a main motor(90) to the driven spindles(92). The main motor(90) is installed at the third carriage(50).

Description

Horizontal type milling machine with multy-axis spindles

The present invention relates to a multi-axis spindle milling machine, and more particularly, to a multi-axis spindle milling machine for processing a plurality of workpieces at the same time to significantly improve productivity.

Conventional milling machines are designed to machine several workpieces with a cutting tool mounted on one spindle or to sequentially machine several workpieces with a numerical control device with a cutting tool mounted on one spindle. It is.

By the way, the conventional milling machine as described above has a problem that takes a lot of machining time when machining a large number of workpieces.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a multi-axis spindle milling machine having an improved structure to simultaneously process a plurality of workpieces by installing a plurality of cutting tools on a multi-axis spindle. have.

1 is a schematic perspective view showing a multi-axis spindle milling machine according to an embodiment of the present invention.

Figure 2 is a schematic exploded perspective view showing an extract of the main part of Figure 1;

Figure 3 is a front view schematically showing the power transmission unit shown in FIG.

<Description of Symbols for Major Parts of Drawings>

10.Main base 13.Support bracket

20.Index part 23.Jig

30,40,50 .. 1st, 2nd and 3rd carriage 31, 41, 51 .. X-axis, Z-axis and Y-axis support

33,43.Z-axis and Y-axis rails 57..frame

60,70,80. 1st, 2nd and 3rd drive part 61,71,81 .. X-axis, Z-axis and Y-axis ball screw

63,73,83. 1st, 2nd and 3rd spindle motor 90. Main motor

92,93,94 .. driven spindle 100 .. power transmission unit

110..Drive spindles 111,122,123,124 Pulleys

130. Driving belt 131. Timing belt

133..flat belt 140,150 .. 1st & 2nd idle pulley

161. Lifting Bracket 163. Adjusting Screw

The multi-axis spindle milling machine according to the present invention for achieving the above object is installed on the main base so as to be movable, and is loaded into an index unit movable between a loading / unloading position and a machining position and then moved to the machining position. A multi-axis spindle milling machine capable of simultaneously processing a plurality of workpieces, comprising: a first carriage movable on the main base in a predetermined X-axis direction; A second carriage movable on the first carriage in a Z axis direction orthogonal to the X axis direction on a horizontal plane; A third carriage movable up and down on the second carriage in a Y-axis direction orthogonal to each of the X and Z axes; First, second and third driving units for movably driving the carriages; Multi-axial driven spindles mounted on the third carriage and moved up and down and arranged to face the Z-axis direction to support each of a plurality of tools for processing the workpiece; And a power transmission unit for simultaneously transmitting and driving the driving force of one main motor installed in the third carriage to each of the driven spins.

Hereinafter, a multi-axis spindle milling machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the multi-axis spindle milling machine according to an embodiment of the present invention, the index unit 20 is installed on the main base 10, and is installed to be movable on the main base 10. The first carriage 30, the second carriage 40 and the third carriage 50, and the first, second and third for driving the respective carriages 30, 40 and 50 to be movable. Drive parts 60, 70, 80, a plurality of driven spindles 92, 93, and 94 rotatably installed on the third carriage 50, and a main motor installed on the third carriage 50. It is provided with a power transmission unit 100 for transmitting the driving force of the 90 to each of the driven spindles (92, 93, 94).

The index unit 20 includes a table 21 rotatably installed on the main base 10 and a jig 23 for supporting a plurality of workpieces installed and loaded on the table 21. The table 21 is rotated at a predetermined time interval by a predetermined drive source (not shown) installed in the main base 10 at a predetermined angle, for example, 180 degrees, so that the workpiece is loaded and unloaded into the jig 23. The jig 23 is changed in posture to the loading / unloading position A and the machining position B in which the movable workpiece is operated. Here, the jig 23 is divided into two divisions and has a workpiece mounting portion 23a for arranging a plurality of workpieces at predetermined intervals, respectively.

A support bracket 13 having a pair of X-axis rails 13a provided side by side in the predetermined X-axis direction is installed around the index portion 20 of the main base 10.

The first carriage 30 is installed on the support bracket 13 to be movable in the X-axis direction. The first carriage 30 is a pair of X-axis support portion 31 which is slidably folded to the X-axis rail 13a at the bottom and a pair formed side by side in the Z-axis direction orthogonal to the X-axis at the top Has a Z-axis rail 33.

The second carriage 40 has a pair of Z-axis support portions 41 formed side by side to be slidably folded on the Z-axis rail 33, and the Y-axis direction perpendicular to each of the X and Z axes. That is, it has a pair of Y-axis rail 43 provided side by side in the up-down direction. The second carriage 40 is slidably moved along the Z axis along the Z axis rail 33 by the driving force of the second driving part 70, and is approached and spaced toward the jig 23.

The third carriage 50 has a pair of Y-axis support portions 51 which are foldably supported on each of the Y-axis rails 43 so as to be slidably supported.

The first driving unit 60 is installed on the X-axis ball screw 61 and the support bracket 13 installed on the support bracket 13 so as to be parallel to the X axis and rotatable about the X axis. A first spindle motor 63 for rotating the screw 61 is provided. The X-axis ball screw 61 is rotatably connected while passing through the guide portion 35 extending to the lower portion of the first carriage 30. Therefore, the X-axis ball screw 61 is moved to move the first carrier 30 in the X-axis direction.

The second driving part 70 is parallel to the Z axis and rotates the Z axis ball screw 71 and the Z axis ball screw 71 installed on the first carriage 30 so as to be rotatable about the Z axis. The second spindle motor 73 is installed at one end of the first carriage 30 to be provided. The Z-axis ball screw 71 is connected to rotate through the guide portion 45 extending to the lower portion of the second carriage 40, and moves the second carriage 40 in the Z-axis direction during rotation.

The third driving part 80 is parallel to the Y axis and rotates the Y axis ball screw 81 and the Y axis ball screw 81 installed in the second carriage 40 to be rotatable about the Y axis. And a third spindle motor 83 installed at the support 55 provided at the upper end of the second carriage 40. The Y-axis ball screw 81 is installed to rotate through the third carriage 50, and moves the third carriage 50 in the Y-axis direction during rotation.

The driven spindles 92, 93, and 94 are arranged side by side in the Z-axis direction to be spaced apart by a predetermined interval in the X-axis direction. These driven spindles 92, 93, and 94 are rotatably installed on the third carriage 50, and the tip is exposed to the outside to face the jig 23 side. In addition, at the distal end of the driven spindles 92, 93, 94, mounting holes 92a, 93a, 94a are formed in which a predetermined processing tool, for example, the drill tool 95, is detachably coupled. Meanwhile, in the present embodiment, three driven spindles 92, 93, and 94 are rotatably installed in the third carriage 50, but a larger number of driven spindles may be installed side by side in a predetermined axial direction. have.

The main motor 90 is coupled to the third carriage 50 and installed on the frame 57 to be elevated together with the third carriage 50.

The power transmission unit 100 is rotatably installed on the frame 57 to receive the driving force of the main motor 90, the drive spindles 110, the drive spindles 110 and the driven spindles 92, 93, 94) pulleys 111, 122, 123, and 124, which are installed in each, and drive belts 130 wound around the pulleys 111, 122, 123, and 124, respectively. . The drive spindles 110 are connected to a rotation shaft 90a of the main motor 90 by a predetermined coupler (not shown) to receive rotational force. The drive belt 130 transmits the power of the drive spindles 110 to the driven spindles 92, 93, and 94 so that they can be rotated at the same time. In addition, the driving belt 130 is a timing belt 131 of the elastic composite or the general flat belt 133 so that the rotation ratio of the driving spindle 110 and the driven spindle (92, 93, 94) is constant. It may be any one of. Accordingly, any one of the timing belt 131 and the flat belt 133 may be selectively used according to the processing conditions of the workpiece. That is, the tapping belt 131 may be used when the tapping operation requires an accurate speed ratio, and the flat belt 133 may be used when the general drilling work, the end mill work, and the cut work are used. When the flat belt 133 is used, the rotational ratio of the driving spindles 110 and the driven spindles 92, 93, and 94 is approximately 3: 1 to obtain a high speed rotational speed (for example, 20,000 rpm). In order to selectively employ each of the belts 131 and 133, each of the pulleys 111, 122, 123, and 124 has a first mounting portion 111 a (122 a, 122 a, 123 a, 124 a) to which the timing belt 131 is mounted, and a flat belt. Second mounting portions 111b (122b, 123b, 124b) on which 133 are mounted are provided.

In addition, the power transmission unit 100 preferably further includes a plurality of first idler pulleys 140 and second idler pulleys 150 to maintain a proper tension of the drive belt 130. The first idler pulley 140 is rotatably installed between the driven spindles 92, 93, and 94 to support the driving of the driving belt 130, respectively. The second idler pulley 150 is rotatably installed between the drive spindles 110 and the driven spindles 92 and 94 to support and support the drive belt 130 traveling therebetween.

In addition, the lifting means for elevating the first idle pulley 140 to adjust the tension of the drive belt 130 is preferably further provided.

Referring to Figure 3, the lifting means, the lifting bracket 161 is installed on the support frame 57 so as to move up and down, the frame 57 is rotatably installed, the adjustment is moved up and down simultaneously with the rotation The screw 163 is provided. A first idler pulley 140 is rotatably installed on the elevating bracket 161 and moved along the elevating bracket 161 in the Y-axis direction. The adjusting screw 163 is provided with a pair to be screwed to each of the pair of fastening portions 58 provided in the frame 57 at predetermined intervals, and is moved in the Y-axis direction during rotation. And, the upper end of each of the adjustment screw 163 is supported by the lifting bracket 161, thereby restricting the lifting and lowering of the lifting bracket 161. In addition, each of the elevating bracket 161 and the frame 57 is provided with guide rails 59 and 163a that are complementarily guided to guide the elevating movement of the elevating bracket 161. Therefore, when the operator rotates the adjusting screw 163 to move forward or backward in the Y-axis direction, the lifting bracket 161 is pushed up by the upper end of the adjusting screw 163 or lowered by a load to move the position. 1 idle pulley 140 is also adjusted to the lifting or lowering the tension of the drive belt (130).

Meanwhile, the main motor 90, the index unit 20, and the respective driving units 50, 60, and 70 are driven and controlled by driving signals transmitted from a control box (not shown). That is, since the control box stores a program for precisely numerically controlling the driving of the carriages 30, 40, 50 and the index unit 20, the jig is controlled by controlling the driving of the milling machine according to the stored program. A plurality of workpieces loaded in (23) can be precisely processed simultaneously. In addition, the control box may have switches for starting and stopping the operation of the entire machine as well as performing manual control in an emergency.

On the other hand, in the above configuration, since the driven spindles 92, 93, 94 are driven using the drive belt 130, the noise is less than that of the gear transmission, and the backlash or chattering of the cutting teeth is eliminated. There is an advantage. In addition, since there is no need to use lubricating oil, it is possible to obtain advantages such as maintaining cleanliness and reducing management costs.

According to the multi-axis spindle milling machine of the present invention as described above, by providing a plurality of horizontal spindle driven spindles can be controlled by employing a plurality of cutting tools at the same time, it is possible to process a large number of workpieces at the same time do.

Therefore, there is an advantage that the productivity of the workpiece can be improved, and the manufacturing cost can also be reduced.

Claims (6)

A multi-axis spindle milling machine which is movably installed on the main base and which is capable of simultaneously machining a plurality of workpieces moved to the machining position after being loaded into an index unit that is movable between a loading / unloading position and a machining position. , A first carriage movable on the main base in a predetermined X-axis direction; A second carriage movable on the first carriage in a Z axis direction orthogonal to the X axis direction on a horizontal plane; A third carriage movable up and down on the second carriage in a Y-axis direction orthogonal to each of the X and Z axes; First, second and third driving units for movably driving the carriages; Multi-axial driven spindles mounted on the third carriage and moved up and down and arranged to face the Z-axis direction to support each of a plurality of tools for processing the workpiece; And And a power transmission unit for simultaneously transmitting and driving the driving force of one main motor installed in the third carriage to each of the driven spindles. According to claim 1, wherein the power transmission unit, Drive spindles coupled to the third carriage and rotatably installed on a frame supporting the main motor, the driving spindles being connected to the rotation shaft of the main motor and driven to rotate; A pulley installed on each of the driving spindles and the driven spindles; And a drive belt installed to the driving pulleys and the pulleys of the driven spindles to transfer the power of the drive spindles to the driven spindles, respectively. The method of claim 2, wherein the drive belt, And a timing belt or a flat belt of elastomer so as to make the rotation ratio of the drive spindles and the driven spindles constant. The method of claim 2, The pulleys provided on each of the driving spindles and the driven spindles are provided with a first mounting portion for mounting a timing belt as the driving belt and a second mounting portion for mounting a flat belt as the driving belt, respectively. Multi-axis spindle milling machine characterized in that one can be selectively employed. The power transmission unit according to any one of claims 2 to 4, wherein A first idler pulley for supporting the drive belt between the plurality of driven spindles and a second idler pulley for supporting the drive belt between the drive spindles and the driven spindles to maintain proper tension of the drive belt. Multi-axis spindle milling machine comprising. The method of claim 5, An elevating bracket supporting the first idler pulley, the elevating bracket mounted on the tool head to be movable; An end of which is rotatably installed on the tool head to be in contact with the lower end of the elevating bracket, and an adjustment screw for pushing up the lower end of the elevating bracket or allowing the elevating bracket to descend during rotation Multi-spindle spindle milling machine, characterized in that to adjust the tension of the drive belt by moving the position of the first idler pulley.