TW201803686A - Five-axis machining head device capable of reducing accumulated errors during transmission and enhancing overall structure stability - Google Patents

Abstract

A five-axis machining head device comprises a main body, a main body driving unit mounted on the main body, a shaft unit pivoted with the main body, a pair of shaft driving units respectively mounted on the main body, and a pair of cross roller bearings. The shaft driving units can simultaneously drive the shaft unit for rotation, so as to reduce accumulated errors during transmission and enhance the machining precision. Furthermore, an outer ring set of the cross roller bearings are screwed with the main body by a plurality of screws, and an inner ring is screwed with the shaft unit by a plurality of screws, so as to enhance the rotation smoothness of the shaft unit.

Description

Five-axis machining head device

The invention relates to a multi-axis processing equipment, in particular to a five-axis processing head device.

An existing spindle head for work machinery (TW Certificate No. I451935 patent) is a drive motor installed in a casing, and the drive motor indirectly drives a spindle unit to rotate through most belts and most pulleys. Must adjust the tension with an idler. Although this type of spindle head can achieve the intended processing purpose, because the drive motor's power is to indirectly drive the spindle unit through the belts and the pulleys, after long-term operation, due to the wear of the belts and the pulleys, the The rotation angle of the spindle unit is prone to errors and affects the accuracy of processing.

In addition, two bearings are installed between a drive shaft and a bearing sleeve of such a spindle head, and an outer ring group of these bearings is pressed and positioned in the axial direction through a pressure plate, and the pressure plate is locked to the shaft by most screws. On the bearing sleeve, however, when tightening these screws, it depends on experience and proficiency, and may cause different errors in the tightness of the outer ring group due to different operators. The operator is tightening the screws At this time, the tightness of the outer ring group pressed by the pressure plate cannot be easily judged, and it may even affect the stability of the drive shaft and the precision of processing.

There is another type of rotating spindle head for working machinery (TW certificate No. I417165 patent), and its driving unit is composed of a torque motor and a planetary gear reduction mechanism. The planetary gear reduction mechanism has a sun gear, most planets The gear and a ring gear are composed, and when the planetary gear type reduction mechanism is transmitting, the backlash generated between the sun gear, the planetary gears and the ring gear and the accumulated errors will also cause a spindle unit There is an error in the rotation angle, and there is still a problem of machining accuracy. In addition, the drive unit only drives one side of the spindle unit, which requires a large torque and a large load.

Furthermore, a bearing is installed between the planetary gear reduction mechanism of the rotating spindle head and a main body, and an outer ring group of the bearing can be fixed to the main body by locking a pressure plate to the main body through most screws, but this This kind of rotary spindle head still has the above-mentioned differences in operators due to the difference in the tightness of the outer ring group, and technical problems that affect the overall structural stability and machining precision.

Therefore, an object of the present invention is to provide a five-axis machining head device which can reduce the cumulative error and can improve the overall structural stability.

Therefore, the five-axis machining head device of the present invention includes a main body, a main body drive unit, a main shaft unit, a pair of main shaft 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 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 rotation center. The spindle unit has a shaft set whose shaft is set in the channel of the main body and a spindle piece set in the shaft set. The shaft set has a pair of rotating parts which are respectively set in the mounting parts. The spindle drive units are respectively installed on the mounting portions of the main body, and can simultaneously drive both sides of the spindle unit to rotate with a second axis perpendicular to the first axis as a rotation center. Each of the spindle drive units includes a A stator which is positioned relative to the main body and a set of rotors provided inside the stator and connected to the rotating parts. Each of the crossed roller bearings has an outer ring group locked to the main body by a plurality of screws, an inner ring locked to the rotating portion by a plurality of screws, and a plurality of the roller bearings arranged between the outer ring group and the inner ring. Roller.

The effect of the present invention is that using the spindle drive units to drive both sides of the spindle unit at the same time can not only reduce the cumulative error, but also the torque required by the spindle drive units is small, the load is small, and the cost can be reduced. The outer ring group of the column bearing is respectively locked to the main body with these screws, and the preload value can be easily controlled.

1 and 2, an embodiment of a five-axis machining head device according to the present invention includes a main body 10, a main body drive unit 20, a main body deceleration unit 30, a main shaft unit 40, a pair of main shaft drive units 50, and a pair of The main shaft reduction unit 60, a pair of crossed roller bearings 70, and a pair of lock units 80.

The main body 10 has a connecting portion 11, a pair of mounting portions 12 connected to two sides of the connecting portion 11, and a channel 13 interposed between the mounting portions 12. The mounting portions 12 are disposed at intervals along a second axis L2, and each has a step-shaped shaft hole 121 disposed along the second axis L2 and a positioning provided outside the shaft hole 121 along the second axis L2.孔 122。 The hole 122.

The main body driving unit 20 can drive the main body 10 to rotate around a first axis L1 that is perpendicular to the second axis L2. The main body driving unit 20 includes a lining kit 21, an upper stator 22 fixed inside the lining kit 21, an upper rotor 23 provided inside the upper stator 22, and an upper rotor 23 connected to the upper rotor 23 and fixed to the upper rotor 23. When the power source passes through the upper stator 22 of the connecting portion 11 of the connecting portion 11, a magnetic force is generated to rotate the upper rotor 23.

The main body deceleration unit 30 is mounted on the main body drive unit 20 and can cause the main body 10 to be decelerated when driven by the main body drive unit 20. The main body deceleration unit 30 of this embodiment includes an upper brake pad 31 which is positioned relative to the liner set 21 and a lower brake pad 32 which is positioned relative to the upper connecting member 24. The upper brake pad 31 and the lower brake pad 32 abut against each other and create damping.

The main shaft unit 40 has a shaft set 41 whose shaft is set in the channel 13 of the main body 10 and a main shaft piece 42 which is set in the shaft set 41. The shaft set 41 has a pair of shafts respectively provided on the mounting portions 12. The rotating portion 411 in the shaft hole 121.

The main shaft driving units 50 are respectively installed in the positioning holes 122 of the main body 10, and can simultaneously drive the rotating portions 411 on both sides of the main shaft unit 40 to rotate with the second axis L2 as the center of rotation. The iso-spindle driving units 50 use 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 disposed inside the stator 51 and connected to the rotating portions 411. The main shaft driving units 50 can drive the main shaft unit 40 to adjust the angle with respect to the main body 10.

The spindle deceleration units 60 are respectively installed between the main body 10 and the rotor 52 of the spindle drive units 50, and can cause the spindle unit 40 to be decelerated when driven by the spindle drive units 50. The spindle deceleration unit 60 of this embodiment includes an inner brake pad 61 that is positioned relative to the mounting portion 12 of the main body 10 and an outer brake pad 62 that is positioned relative to the rotor 52. The inner brake pads 61 and The corresponding outer brake pads 62 abut against each other and generate damping.

The crossed roller bearings 70 each have an outer ring group 71 locked to the mounting portion 12 of the main body 10 with a plurality of screws 74, an inner ring 72 locked to the rotating portions 411 with a plurality of screws 75, and a plurality of settings A roller 73 between the outer ring group 71 and the inner ring 72. The outer ring groups 71 each have a set of inner ring members 711 provided in the shaft holes 12, an outer ring member 712 provided along the second axis L2 on the outside of the inner ring member 711, and the screws 74 pass through Passed through the inner ring member 711 and the outer ring member 712 and 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 again, 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 is generated between the upper stator 22 and the upper rotor 22, which can be transmitted through the The upper connecting member 24 drives the main body 10 to rotate around the first axis L1 as a rotation center. And using the upper brake pad 31 and the lower brake pad 32 of the main body deceleration unit 30 against each other and generating damping, the main body 10 can be decelerated when driven by the main body drive unit 20, and the main body 10 can drive the main body 10 The spindle unit 40 rotates with the first axis L1 as a rotation center.

When the power source passes through the stators 51 of the spindle driving units 50, a magnetic interaction is generated between the stator 51 and the rotor 52, and the spindle unit 40 can be driven through the rotating portions 411 to center the second axis L2 as a rotation center. When the rotation is generated, the main shaft unit 40 can be adjusted to an angle with respect to the main body 10, and the main shaft unit 40 can be used to perform a machining operation at a predetermined angle. In addition, by using the inner brake pads 61 and the outer brake pads 62 of these spindle reduction units 60 to abut each other and generate damping, 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 drive units 50 can simultaneously drive the rotation portions 411 on both sides of the spindle unit 40, which can not only reduce the cumulative error, And can improve the accuracy of processing. Furthermore, the required torque and load of the spindle drive units 50 are small, which can reduce costs.

In addition, the inner ring members 711 and outer ring members 712 of the crossed roller bearings 70 are passed through the screws 74 and locked to the mounting portion 12. When an operator operates the screws 74, it is easy Controlling the preload value will not cause different error values of the tightness of the outer ring group 71 due to different operators, so the overall structure stability and processing precision can be ensured.

Furthermore, in the present invention, when assembling, the pressing screw 82 of one of the locking units 80 is used to lock the stator 51 of the corresponding one of the spindle driving units 50 first, and then the pressing screw 82 of the other locking unit 80 is relative to The stator 51 of the corresponding spindle drive unit 50 is unscrewed, and after the electrical angles on both sides of the spindle unit 40 are adjusted to be consistent, the tightening screw 82 is relative to the stator 51 of the corresponding spindle drive unit 50. Positioning is urgent, so the operation of assembly and adjustment is quite easy.

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

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

10‧‧‧ main body
11‧‧‧ Connection Department
12‧‧‧Mounting Department
121‧‧‧ Shaft hole
122‧‧‧ Positioning hole
13‧‧‧Slot
20‧‧‧Main body drive unit
21‧‧‧lining kit
22‧‧‧Upper stator
23‧‧‧ Upper rotor
24‧‧‧Upper connector
30‧‧‧body reduction unit
31‧‧‧up brake pads
32‧‧‧ Lower brake pads
40‧‧‧ Spindle Unit
41‧‧‧ Shaft Kit
411‧‧‧Rotating part
42‧‧‧ Spindle Parts
50‧‧‧spindle drive unit
51‧‧‧ stator
52‧‧‧rotor
60‧‧‧ Spindle Deceleration Unit
61‧‧‧Inner brake pads
62‧‧‧outer brake pads
70‧‧‧ Crossed Roller Bearing
71‧‧‧ Outer circle group
711‧‧‧Inner ring pieces
712‧‧‧outer ring
72‧‧‧ inner circle
73‧‧‧ roller
74‧‧‧Screw
75‧‧‧Screw
80‧‧‧ lock unit
81‧‧‧ Positioning piece
82‧‧‧Locking Screw
83‧‧‧ Tightening screws
L1‧‧‧ first axis
L2‧‧‧Second axis

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a combined sectional view of an embodiment of a five-axis processing head device of the present invention; and FIG. 2 is the embodiment An incomplete partial magnified schematic.

10‧‧‧ main body

11‧‧‧ Connection Department

12‧‧‧Mounting Department

13‧‧‧Slot

20‧‧‧Main body drive unit

21‧‧‧lining kit

22‧‧‧Upper stator

23‧‧‧ Upper rotor

24‧‧‧Upper connector

30‧‧‧body reduction unit

31‧‧‧up brake pads

32‧‧‧ Lower brake pads

40‧‧‧ Spindle Unit

41‧‧‧ Shaft Kit

42‧‧‧ Spindle Parts

50‧‧‧spindle drive unit

51‧‧‧ stator

52‧‧‧rotor

60‧‧‧ Spindle Deceleration Unit

70‧‧‧ Crossed Roller Bearing

80‧‧‧ lock unit

L1‧‧‧ first axis

L2‧‧‧Second axis

Claims (7)

A five-axis machining head device includes: a main body having a connecting portion, a pair of mounting portions connected to the connecting portion, and a channel between the mounting portions; a main body driving unit mounted on the main body; The connecting part can drive the main body to rotate with a first axis as a rotation center; a main shaft unit having a shaft set having a shaft set in a channel of the main body and a main shaft piece set in the shaft set and the shaft set There are a pair of rotating parts respectively provided in the mounting parts; a pair of main shaft driving units, which are respectively installed in the mounting parts of the main body, can drive both sides of the main shaft unit at a time perpendicular to the first axis The second axis is a rotation center for rotation. Each of the spindle drive units includes a stator that is positioned relative to the main body, and a set of rotors that are located inside the stator and connected to the rotation parts; and a pair of crossed roller bearings. Each has an outer ring group locked to the main body with a plurality of screws, an inner ring locked to the rotating parts with a plurality of screws, and a plurality of rollers provided between the outer ring group and the inner ring The five-axis machining head device according to claim 1, wherein the main shaft driving units are respectively installed on the mounting portions of the main body, and can drive the main shaft unit to make an angle adjustment with respect to the main body. It also 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 tightening screws that are screwed to the positioning members and can be fixed relative to the stator. The five-axis machining head device according to claim 1, wherein the main body driving unit includes a lining kit, an upper stator fixed inside the lining kit, a set of upper rotors inside the upper stator, and a connection When the power source passes through the upper stator and is connected to the upper rotor and is fixed on the connecting part, a magnetic force is generated to rotate the upper rotor. The five-axis machining head device according to claim 1, further comprising a main body deceleration unit mounted on the main body drive unit, the main body deceleration unit enables the main body to be decelerated when driven by the main body drive unit. The five-axis machining head device according to claim 4, wherein the main reduction unit includes an upper brake pad positioned relative to the bushing and a brake pad positioned relative to the upper connector, and the upper brake pad It abuts against the lower brake pad and generates damping. The five-axis machining head device according to claim 1, further comprising a pair of spindle deceleration units respectively installed between the main body and the spindle drive units. The spindle deceleration unit enables the spindle unit to be used by the spindle drive units. Deceleration can occur during driving. The five-axis machining head device according to claim 6, wherein the spindle deceleration units each include an inner brake pad that is positioned relative to the mounting portion of the main body and an outer brake pad that is positioned relative to the rotor. The inner brake pads and the corresponding outer brake pads abut each other and generate damping.