TWI610753B - Five-axis machining head unit - Google Patents

Description

Five-axis machining head unit

The present invention relates to a multi-axis machining apparatus, and more particularly to a five-axis machining head apparatus.

A spindle head for a working machine (TW No. I451935) is a drive motor mounted in a housing, and the drive motor indirectly drives a spindle unit through a plurality of belts and a plurality of pulleys, and the belts are still The tension must be adjusted with an idler. Although such a spindle head can achieve the intended processing purpose, since the power of the drive motor is indirectly driven by the pulleys and the pulleys, after long-term operation, due to wear of the belts and the pulleys, The rotation angle of the spindle unit is prone to errors and affects the accuracy of the machining.

In addition, a bearing is mounted between a driving shaft of the spindle head and a bearing sleeve, and an outer ring group of the bearings is axially pressed and positioned through a pressing plate, and the pressing plate is locked by the plurality of screws. On the bearing sleeve, however, when locking the screws, it depends on experience and proficiency, and may cause different error values due to the difference of the operator. The operator is locking the screws. When you can’t easily judge The tightness of the outer ring group pressed by the pressure plate may even affect the stability of the drive shaft and the precision of the machining.

Another rotating spindle head of a working machine (TW No. I417165) has a driving unit composed of a torque motor and a planetary gear type speed reducing mechanism having a sun gear and a majority of planets. a gear and a ring gear, and when the planetary gear type speed reduction mechanism is driven, the backlash generated between the sun gear, the planetary gears and the ring gear and the accumulated error are also caused by a spindle unit The angle of rotation produces an error, and there is still the problem of machining accuracy. Moreover, the driving unit only drives one side of the spindle unit, and the required torque is large and the load is large.

Furthermore, a bearing is mounted between the planetary gear type speed reduction mechanism of the rotary spindle head and a main body, and an outer ring group of the bearing is fixed to the main body by a plurality of screws to be fixed to the main body, but this The type of rotating spindle head still has the above-mentioned differences due to the operator, and the tightness of the outer ring group may cause different error values, as well as technical problems that may affect the overall structural stability and the precision of the machining.

Accordingly, it is an object of the present invention to provide a five-axis machining head apparatus that reduces cumulative errors and that enhances overall structural stability.

Thus, the five-axis machining head device of the present invention comprises a main body, a main body drive unit, a spindle unit, a pair of spindle drive units and a pair of crossed roller bearings. The main body has a connecting portion, a pair of mounting portions connected to the connecting portion, and a channel interposed between the mounting portions. The main body driving unit is mounted on the connecting portion of the main body, and can drive the main body to rotate with a first axis as a center of rotation. The spindle unit has a shaft sleeve disposed in a channel of the body and a spindle member disposed in the shaft assembly, the shaft assembly having a pair of rotating portions respectively disposed in the mounting portions. The spindle drive units are respectively mounted on the mounting portions of the main body, and the two sides of the main shaft unit are simultaneously driven to rotate by a second axis perpendicular to the first axis. The spindle drive units each include a A stator that is positioned relative to the body and a set of rotors disposed within the stator and coupled to the rotating portions. Each of the crossed roller bearings has an outer ring set that is locked to the main body by a plurality of screws, an inner ring that is locked to the rotating parts by a plurality of screws, and a plurality of screws disposed between the outer ring set and the inner ring Roller.

The effect of the invention is that the spindle drive unit can simultaneously drive both sides of the spindle unit, thereby not only reducing the accumulated error, but also the torque required by the spindle drive unit is small, the load is small, the cost can be reduced, and the cross roll is reduced. The outer ring set of the column bearing is respectively locked to the main body with the screws, and the preload value can be easily controlled.

10‧‧‧ Subject

11‧‧‧Connecting Department

12‧‧‧Installation Department

121‧‧‧Axis hole

122‧‧‧Positioning holes

13‧‧‧ channel

20‧‧‧ body drive unit

21‧‧‧ bushing parts

22‧‧‧Upper stator

23‧‧‧Upper rotor

24‧‧‧Upper connector

30‧‧‧ body reduction unit

31‧‧‧Upper car

32‧‧‧Down car

40‧‧‧ spindle unit

41‧‧‧Axis kit

411‧‧‧Rotation

42‧‧‧Spindle parts

50‧‧‧Spindle drive unit

51‧‧‧ Stator

52‧‧‧Rotor

60‧‧‧Spindle reduction unit

61‧‧‧Inside car

62‧‧‧External car

70‧‧‧cross roller bearings

71‧‧‧Outer ring group

711‧‧‧ Inner ring

712‧‧‧Outer ring

72‧‧‧ inner circle

73‧‧‧roller

74‧‧‧ screws

75‧‧‧ screws

80‧‧‧Lock unit

81‧‧‧ positioning parts

82‧‧‧Locking screws

83‧‧‧Forcing screws

L1‧‧‧first axis

L2‧‧‧second axis

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a cross-sectional view of an embodiment of the five-axis processing head device of the present invention; and FIG. 2 is the embodiment. An incomplete partial enlargement diagram.

1 and 2, an embodiment of a five-axis processing head device of the present invention comprises a main body 10, a main body driving unit 20, a main body reduction unit 30, a main shaft unit 40, a pair of main shaft driving units 50, and a pair. A spindle reduction unit 60, a pair of crossed roller bearings 70, and a pair of locking units 80.

The main body 10 has a connecting portion 11 , a pair of mounting portions 12 connected to both sides of the connecting portion 11 , and a channel 13 interposed between the mounting portions 12 . The mounting portions 12 are spaced apart along a second axis L2, and each has a shaft hole 121 disposed along the second axis L2 and having a frame shape, and a positioning disposed outside the shaft hole 121 along the second axis L2. Hole 122.

The main body driving unit 20 can drive the main body 10 to rotate with a first axis L1 perpendicular to the second axis L2 as a center of rotation. The main body driving unit 20 includes a bushing member 21, an upper stator 22 fixed to the inner portion of the bushing member 21, a set of upper rotors 23 disposed inside the upper stator 22, and a second rotor attached to the upper rotor 23 and fixed to the upper rotor 23 The upper connecting member 24 of the connecting portion 11 causes a magnetic force to interact with the upper stator 24 when the power source passes through the upper stator 22.

The main body reduction unit 30 is mounted to the main body drive unit 20, and can cause deceleration when the main body 10 is driven by the main body drive unit 20. The main body reduction unit 30 of the present embodiment includes a top brake piece 31 that is positioned relative to the bushing member 21 and A lower jaw piece 32 that is positioned relative to the upper link member 24, the upper jaw piece 31 and the lower jaw piece 32 abut each other and create damping.

The spindle unit 40 has a shaft assembly 41 disposed in the channel 13 of the main body 10 and a main shaft member 42 disposed in the shaft assembly 41. The shaft assembly 41 has a pair of shafts respectively disposed on the mounting portions 12 The rotating portion 411 in the shaft hole 121.

The spindle drive units 50 are respectively mounted in the positioning holes 122 of the main body 10, and the rotating portions 411 on both sides of the spindle unit 40 can be simultaneously driven to rotate with the second axis L2 as a center of rotation. The spindle drive unit 50 is a direct drive motor and each includes a stator 51 that is positioned relative to the main body 10 and a set of rotors 52 that are disposed inside the stator 51 and that are coupled to the rotating portions 411. The spindle drive unit 50 can drive the spindle unit 40 to produce an angular adjustment relative to the body 10.

The spindle reduction units 60 are respectively mounted between the main body 10 and the rotor 52 of the spindle drive unit 50, and can be decelerated when the spindle unit 40 is driven by the spindle drive units 50. The spindle reduction unit 60 of the present embodiment includes an inner carriage piece 61 that is positioned relative to the mounting portion 12 of the main body 10, and an outer brake piece 62 that is positioned relative to the rotor 52. The corresponding outer slats 62 abut each other and create damping.

The crossed roller bearings 70 each have an outer ring set 71 that is locked to the mounting portion 12 of the main body 10 by a plurality of screws 74, an inner ring 72 that is locked to the rotating portions 411 by a plurality of screws 75, and a plurality of settings. a roller between the outer ring set 71 and the inner ring 72 73. The outer ring sets 71 each have a set of inner ring members 711 disposed in the axial holes 121, and an outer ring member 712 disposed on the outer side of the inner ring members 711 along the second axis L2. The screws 74 are worn. The inner ring member 711 and the outer ring member 712 are locked to the mounting portion 12.

The locking units 80 each have a positioning member 81 that can be locked to the main body 10 by a plurality of locking screws 82, and a plurality of pressing screws 83 that are screwed to the positioning members 81 and can be fixed relative to the stator 51.

As shown in FIG. 1 and FIG. 2, when the overall assembly is completed and the power is passed through the upper stator 22 of the main body driving unit 20, a magnetic interaction occurs between the upper stator 22 and the upper rotor 23, and the The upper connecting member 24 drives the main body 10 to rotate with the first axis L1 as a center of rotation. And the upper brake shoe 31 and the lower brake shoe 32 of the main body reduction unit 30 abut against each other and generate damping, so that the main body 10 can be decelerated when driven by the main body driving unit 20, and the main body 10 can drive the main body 10 The spindle unit 40 is rotated by the first axis L1 as a center of rotation.

When the power source passes through the stator 51 of the spindle drive unit 50, a magnetic force is generated between the stator 51 and the rotor 52, and the spindle unit 40 is simultaneously driven by the rotating portion 411 to rotate the second axis L2. Rotation is generated to cause the spindle unit 40 to be angularly adjusted with respect to the main body 10, and the spindle unit 40 is used to perform a predetermined angle of processing. Moreover, the inner cymbal 61 and the outer cymbal 62 of the spindle reduction unit 60 abut against each other and generate damping, so that the spindle unit 40 can be decelerated when driven by the spindle drive unit 50.

Therefore, with the overall structure of the present invention, multi-axis rotation can be generated, and the intended processing purpose can be achieved, and the spindle driving unit 50 can simultaneously drive the rotating portions 411 on both sides of the spindle unit 40, thereby reducing the cumulative error. And can improve the precision of processing. Moreover, the spindle drive unit 50 requires a small torque and a small load to reduce the cost.

In addition, the inner ring member 711 and the outer ring member 712 of the crossed roller bearing 70 are passed through the screws 74 and locked to the mounting portion 12, and the operator can easily operate the screws 74. By controlling the preload value, the tightness of the outer ring set 71 may not be different due to the difference of the operator, so that the overall structural stability and the precision of the machining can be ensured.

Furthermore, in the assembly of the present invention, the stator 51 of the corresponding one of the spindle drive units 50 is first locked by the tightening screw 83 of one of the locking units 80, and the tightening screw 83 of the other locking unit 80 is opposed to The stator 51 of the corresponding spindle drive unit 50 is loosened, and after the electrical angles on both sides of the spindle unit 40 are adjusted, the tensioning screw 83 is opposite to the stator 51 of the corresponding spindle drive unit 50. Positioning is tight, so the operation of assembling and adjusting is quite easy.

In summary, the five-axis processing head device of the present invention has a simple overall structure and can achieve the intended processing purpose, and can indeed achieve the object of the present invention.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, and the scope and patent description of the patent application according to the present invention. The simple equivalent changes and modifications made by the contents of the book are still within the scope of the invention patent.

10‧‧‧ Subject

11‧‧‧Connecting Department

12‧‧‧Installation Department

13‧‧‧ channel

20‧‧‧ body drive unit

21‧‧‧ bushing parts

22‧‧‧Upper stator

23‧‧‧Upper rotor

24‧‧‧Upper connector

30‧‧‧ body reduction unit

31‧‧‧Upper car

32‧‧‧Down car

40‧‧‧ spindle unit

41‧‧‧Axis kit

42‧‧‧Spindle parts

50‧‧‧Spindle drive unit

51‧‧‧ Stator

52‧‧‧Rotor

60‧‧‧Spindle reduction unit

70‧‧‧cross roller bearings

80‧‧‧Lock unit

L1‧‧‧first axis

L2‧‧‧second axis

Claims (7)

A five-axis machining head device comprising: a main body having a connecting portion, a pair of mounting portions connected to the connecting portion, and a channel interposed between the mounting portions; a main body driving unit mounted on the main body a connecting portion that can drive the main body to rotate with a first axis as a center of rotation; a spindle unit having a shaft sleeve disposed in a channel of the main body and a main shaft member disposed in the shaft assembly, the shaft assembly Having a pair of rotating portions respectively disposed in the mounting portions; a pair of spindle driving units respectively mounted on the mounting portions of the main body, and simultaneously driving both sides of the main shaft unit to be perpendicular to the first axis The second axis generates rotation for the center of rotation, each of the spindle drive units includes a stator that is positioned relative to the body and a set of rotors disposed inside the stator and coupled to the rotating portions; and a pair of crossed roller bearings Each has an outer ring set that is locked to the main body by a plurality of screws, an inner ring that is locked to the rotating parts by a plurality of screws, and a plurality of rollers disposed between the outer ring set and the inner ring. The five-axis processing head device according to claim 1, wherein the spindle driving units are respectively mounted on the mounting portions of the main body, and the spindle unit can be driven to generate an angle adjustment with respect to the main body, the five-axis processing head device The device further includes a pair of locking units, each of which has a positioning member that can be locked to the main body by a plurality of locking screws, and a plurality of pressing screws that are screwed on the positioning members and can be fixed relative to the stator. The five-axis processing head device of claim 1, wherein the main body driving unit comprises a bushing member, an upper stator fixed inside the bushing member, a set of upper rotors disposed inside the upper stator, and a connection The upper connecting member of the upper rotor and fixed to the connecting portion, when a power source passes through the upper stator, generates a magnetic interaction to rotate the upper rotor. The five-axis machining head device of claim 1, further comprising a main body reduction unit mounted to the main body drive unit, wherein the main body reduction unit causes deceleration when the main body is driven by the main body drive unit. The five-axis machining head device of claim 4, wherein the main body reduction unit comprises a top brake piece that is positioned relative to the bushing member and a lower jaw piece that is positioned relative to the upper connection piece, the upper brake car The sheet and the ram sheet abut each other and generate damping. The five-axis machining head device of claim 1, further comprising a pair of spindle reduction units respectively mounted between the main body and the spindle drive units, the spindle reduction unit being configured to be driven by the spindle drive units Deceleration can occur when driving. The five-axis machining head device of claim 6, wherein the spindle reduction units respectively comprise an inner vehicle piece that is positioned relative to the mounting portion of the main body and an outer vehicle piece that is positioned relative to the rotor. The inner car piece and the corresponding outer car piece abut each other and generate damping.