WO2013056467A1

WO2013056467A1 - Dual-swing head and five-axis motion system having the dual-swing head

Info

Publication number: WO2013056467A1
Application number: PCT/CN2011/081123
Authority: WO
Inventors: 单忠德; 刘丽敏; 刘丰
Original assignee: 机械科学研究总院先进制造技术研究中心
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2013-04-25

Abstract

A dual-swing head and a five-axis motion system having the dual-swing head. The dual-swing head comprises: a C-axis driving device (21), having a C-axis driving shaft (211); an A-axis driving device (23), connected to the C-axis driving shaft through a first transmission mechanism, simultaneously rotating along with the C-axis driving shaft (211), and having an A-axis driving shaft (231); a machining device mounting base (25), connected to the A-axis driving device (23) through a second transmission mechanism and simultaneously swinging along with the rotation of the A-axis driving shaft (231). The dual-swing head uses the first transmission mechanism and the second transmission mechanism to transmit power of the C-axis driving device (21) and the A-axis driving device (23) to a machining device that needs to be driven, so that a disk servo motor can be replaced by a common servo motor, thereby reducing the manufacturing costs of the dual-swing head, and meeting the requirement of the dieless casting and forming machine for machining apparatuses of low machining precision.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of machining equipment, and in particular to a double oscillating head. Further, the present invention relates to a five-axis motion system including the above-described double oscillating head. BACKGROUND OF THE INVENTION At present, a double-swing head applied to a machining center uses a disk-type servo motor as a C-axis drive device A-axis drive device. When the double-swing head is operated, the output shaft of the disk-type servo motor is directly connected to the driven device. Connected to drive the machining tool for precise machining. Although the double oscillating head has high processing precision, it is expensive, and it cannot be applied to the field of mechanical processing where the processing precision is not high and the low cost demand is strong. For example, for a dieless casting machine, since the workpiece is sanded, the machining accuracy is not high. If the existing double oscillating head is used, the overall cost of the dieless casting machine is increased, and the single piece and small part of the casting cannot be satisfied. Batch production needs. Therefore, it is necessary to provide a lower cost double oscillating head to meet the needs of small-scale, low-cost, low-precision production. In addition, the machining tools mounted on the double oscillating head, such as milling cutters, are generally driven by a driving device. When the machining tool is working, the driving device is in a high-speed operation state, and more heat is generated to drive the device. The temperature rise of itself and the surrounding environment easily affects the service life of the drive unit. Moreover, in the case of a machining machine such as a die-casting machine, in the process of processing the workpiece, waste debris is generated, which causes contamination of the processing tool and affects the work quality of the processing tool and the entire processing equipment. SUMMARY OF THE INVENTION The present invention aims to provide a double oscillating head and a five-axis motion system having the double oscillating head, so as to solve the problem that the existing double oscillating head has high cost, can not be applied to a moldless casting forming machine, and other processing precision requirements are low and low. Technical problems on processing equipment with high cost processing requirements. In order to achieve the above object, according to an aspect of the invention, a double oscillating head is provided, comprising: a C-axis driving device having a C-axis driving shaft; and an A-axis driving device connected to the C-axis driving shaft through the first transmission mechanism, And the C-axis drive shaft rotates synchronously, and has an A-axis drive shaft; the processing device mount is connected to the output shaft of the A-axis drive device through the second transmission mechanism, and swings with the rotation of the A-axis drive shaft.

1 Further, the first transmission mechanism comprises: a C-axis driving device mounting seat, the C-axis driving device is disposed in the C-axis driving device mounting seat; the rotating table is disposed below the C-axis driving device mounting seat and connected to the C-axis driving shaft And the C axis drive shaft rotates synchronously. Further, the C-axis driving device mount has an axial step mounting hole coaxial with the C-axis driving shaft, and the housing of the C-axis driving device is clamped on the outer step of the axial step mounting hole, and the rotating table has an extension to the axial step A boss portion in the mounting hole is sleeved on the outer circumference of the C-axis drive shaft and connected to the C-axis drive shaft, and a roller bearing is disposed between the outer circumference of the boss portion and the inner wall of the axial step mounting hole. Further, the A-axis drive shaft extends through the processing device mount, and the second transmission mechanism includes a drive flange sleeved on the first end of the A-axis drive shaft, and the drive flange is coupled with the A-axis drive shaft, and the orientation of the drive flange The end face of the processing device mount is fixedly connected to the processing device mount. Further, an A-axis driving device mounting seat is disposed under the rotating table, the outer casing of the A-axis driving device is fixed on the outer side of the A-axis driving device mounting seat, and the A-axis driving shaft is inserted through the A-axis driving device mounting seat, and the driving flange is disposed on the A first side wall of the A-axis drive mount is between the first side wall of the processing device mount. Further, a middle portion of the second side wall of the A-axis driving device mounting seat is provided with a through hole coaxial with the A-axis driving shaft, and a second end of the A-axis driving shaft is disposed in the through hole, and the A-axis driving device mounting seat A support flange fixed to the second side wall of the processing device mount is disposed between the second side wall and the second side wall of the processing device mount, and the support flange has an extension flange extending into the through hole and located at the A-axis drive shaft A deep groove ball bearing is disposed between the outer periphery of the support portion and the inner wall of the through hole at the outer peripheral support portion. Further, the A-axis driving device mounting base further includes a base, and the first side wall of the A-axis driving device mounting seat is integrally formed with the base, and the second side wall of the A-axis driving device mounting seat is detachably connected to the base. Further, the C-axis driving device and the A-axis driving device are both servo motors. Further, an air inlet is disposed above the processing device mount, and an air outlet is disposed below, and the air inlet is connected to the cooling gas supply source through the first air supply pipeline. Further, a processing device is disposed below the processing device mount, and a blowing nozzle facing the processing device is disposed above the processing device, and the blowing nozzle is connected to the cooling gas supply source through the second gas transmission line. According to another aspect of the present invention, there is also provided a five-axis motion system including an XYZ three-axis motion unit, further comprising the above-described double swing head disposed on a Z-axis motion unit in the XYZ three-axis motion unit. Further, the C-axis drive of the double-swing head is fixed to the Z-axis motion slider in the Z-axis motion unit by a C-axis drive mount. The invention has the following beneficial effects:

1. The double oscillating head provided by the invention transmits the power of the output shaft of the c-axis driving device to the A-axis driving device by using the first transmission mechanism, drives the A-axis driving device to rotate synchronously, and then uses the second transmission mechanism to take the A-axis The power of the output shaft of the driving device is transmitted to the mounting device mounting seat, and the ordinary servo motor can be used instead of the disc servo motor to realize the transmission of power, thereby achieving the purpose of reducing the manufacturing cost of the double swing head.

2. Since the air inlet and the air outlet for the circulation of the cooling gas are arranged on the mounting seat of the processing device, the operating temperature of the processing device can be effectively reduced, and the air nozzle facing the processing device can be disposed above the processing device, and the processing can be performed at the same time. The device performs cooling of the cleaning machine, improves the service life of the processing device and its driving device, and improves the working efficiency of the double oscillating head and the material motion system having the double oscillating head. In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The invention will now be described in further detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional structural view of a double oscillating head according to a preferred embodiment of the present invention; FIG. 2 is a schematic view showing the overall structure of a double oscillating head according to a preferred embodiment of the present invention; A schematic diagram of the structure between the apparatus and the cooling gas supply means; and Fig. 4 is a schematic view showing the structure of the five-axis motion system of the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention are described in detail below with reference to the accompanying drawings. As shown in Fig. 1, according to one aspect of the present invention, a double oscillating head is provided, which is intended to be mainly applied to a single-piece machining, small batch size, low precision requirements, and strict cost control. The double oscillating head comprises: a C-axis driving device 21 having a C-axis driving shaft 211; an A-axis driving device 23 connected to the C-axis driving shaft 211 through a first transmission mechanism, and synchronously rotating with the C-axis driving shaft 211, and having The A-axis drive shaft 231; the processing device mount 25 is connected to the output shaft of the A-axis drive unit 22 via the second transmission mechanism, and is swung with the rotation of the A-axis drive shaft 231. The double oscillating head provided by the present invention can transmit the output power of the C-axis driving device 21 and the A-axis driving device 23 to the components to be driven by the next stage by using the first transmission mechanism and the second transmission mechanism, without the need for a disk-type servo motor. The parts that need to be driven are directly driven by the drive shaft, so that a conventional servo motor can be used instead of the disc type servo motor. Although the machining accuracy is lowered, the manufacturing cost is significantly reduced, and, for the moldless casting molding machine, etc. Processing equipment that requires relatively low machining accuracy is fully capable of meeting the requirements. The first transmission mechanism may include: a C-axis driving device mounting seat 213, the C-axis driving device 21 is disposed in the C-axis driving device mounting seat 213; the rotating table 215 is disposed under the C-axis driving device mounting seat 213, and the C-axis The drive shafts 211 are connected and rotate in synchronization with the C-axis drive shaft 211. Specifically, the C-axis driving device mount 213 has an axial step mounting hole coaxial with the C-axis driving shaft 211, and the housing of the C-axis driving device 21 is stuck on the outer step of the axial step mounting hole, and the rotating table 215 has a boss portion 215a extending into the axial step mounting hole, the boss portion 215a being sleeved on the outer circumference of the C-axis drive shaft 211 and connected to the C-axis drive shaft 211, the outer circumference of the boss portion 215a and the axial step mounting hole A roller bearing 217 is disposed between the inner walls. The roller bearing 217 may be a tapered roller bearing. The upper portion of the rotary table 215 may be mounted with a pair of tapered roller bearings. The tapered roller bearing is locked with a brake nut 218 above, and the lower portion passes through the shoulder of the C-axis drive mounting seat 213. fixed. The relative rotation between the rotary table 215 and the C-axis drive mounting seat 213 can be realized by the roller bearing 217, and the driving force of the C-axis drive shaft 211 can be transmitted to the rotary table 215. A cover 219 is also provided on the outer side of the rotary table 215.

The A-axis drive shaft 231 extends through the processing device mount 25, and it can be said that the processing device mount 25 is disposed on the A-axis drive shaft 231 from the side sleeve. In this case, the second transmission mechanism may include a sleeve drive on the A-axis. The drive flange 257 of the first end of the shaft 231 (on the left side of the processing device mount 25 in FIG. 1), the drive flange 257 is keyed to the A-axis drive shaft 231, and the end face of the drive flange 257 facing the processing device mount 25 It is fixedly connected to the first side surface of the processing device mount 25 (the left outer side surface of the processing device mount 25 in Fig. 1). That is to say, the transmission flange 257 is synchronously rotated coaxially with the A-axis drive shaft 231 by the spline, and the processing device mount 25 is oscillated by the rotation of the A-axis drive shaft 231 by the drive flange 257. In Fig. 1, the direction perpendicular to the plane of the paper oscillates, which in turn drives the processing device disposed in the processing device mount 25 to oscillate as the A-axis drive shaft rotates. In order to realize the connection between the A-axis driving device 23 and the rotating table 215, an A-axis driving device mount is connected below the rotating table 215, and the A-axis driving device mounting seat has a downwardly downward groove, and the A-axis driving device 23 The outer casing is fixed to the outside of the A-axis drive mounting seat, and the processing device mount 25 is disposed in the recess of the A-axis drive mounting. The A-axis drive shaft 231 extends through the A-axis drive mount (the A-axis drive shaft 231 sequentially passes from the left side of the A-axis drive mount and the left side of the processing apparatus mount 25, and then from the right side of the processing apparatus mount 25 And the right side of the A-axis drive mounting seat, the drive flange 257 is disposed on the first side wall (left side wall) 233 of the A-axis drive mounting seat and the first side of the processing device mount 25 (left side Between). In order to support the A-axis drive shaft 231, a central portion of the second side wall 235 of the A-axis drive mount is provided with a through hole coaxial with the A-axis drive shaft 231, and a second end of the A-axis drive shaft 231 Provided in the through hole, a second side wall (right side wall) 235 of the A-axis driving device mount and a second side wall of the processing device mounting seat 25 are provided with a second side wall fixed to the processing device mounting seat 25. The upper support flange 259 has a support portion extending into the through hole of the second side wall 235 and located on the outer circumference of the A-axis drive shaft 231. In order to prevent interference between the support portion and the inner wall of the through hole, the support portion can be rotated along with the rotation of the A-axis drive shaft 231, and a deep groove ball bearing can be disposed between the outer circumference of the support portion and the inner wall of the through hole. 258. One side of the deep groove ball bearing 258 is fixed by the shoulder of the second side wall 235 of the A-axis drive mounting seat, and the other side is fixed by the bearing end cover 250, and the bearing end cover 250 is fixed to the second side wall 235 by bolts. .

The A-axis driving device mounting base further includes a base. In order to facilitate the mounting and dismounting of the processing device mounting seat 25, the first side wall 233 of the A-axis driving device mounting seat is integrally formed with the base to form an L-shaped base, and the second side wall 235 is A separate detachable connection between the L-shaped bases. As shown in FIG. 2, in order to protect the A-axis driving device 23 from contamination of the A-axis driving device 23 after cutting, the A-axis driving device 23 may be provided with a protective cover. The shield may include a left shield 237 disposed on one side of the body of the A-axis driving device 23 (outside of the first side wall 233) and an end side (second side) of the A-axis driving shaft disposed on the A-axis driving device 23. The right shield 239 of the outer side of the wall 235, the left shield 237 is connected to the L-shaped base 233, and the right shield 239 is connected to the second side wall 235. The second transmission mechanism may include a transmission flange 257 sleeved at a first end of the A-axis drive shaft 231, the transmission flange 257 is keyed to the A-axis drive shaft 231, and the second end surface of the transmission flange 257 and the processing device mount The first side of the 25 is fixedly connected. Through the above multiple power transmission mechanisms, the C-axis driving device 21 and the A-axis driving device 23 can be driven by a common servo motor, and the power of the two servo motors can be realized by using the tapered roller bearing and the deep groove roller bearing 258, respectively. The stable output, simple structure, easy to implement, without the need for high-precision disc servo motors, greatly reduces the manufacturing cost of the double swing head. As shown in FIG. 3, since the high-speed driving device is usually provided in the processing device mount 25, for example, for the moldless casting molding machine, the machining device mount 25 is provided with an electric spindle for driving the cutting tool. . When the driving device is working, a large amount of heat is generated. In order to reduce the temperature of the driving device, such as the environment in which the electric spindle is placed, the top surface of the processing device mount 25 is provided with an air inlet, and the air of the cooling gas supply source 40 is provided. The end is connected to the intake port through the first gas delivery pipe 41. The cooling gas supply source 40 and the air inlet provided on the top surface of the processing device mount 25 can blow the cooling gas into the space where the driving device is located, thereby effectively reducing the operating temperature of the driving device and improving the electric spindle and the like. The service life of the drive. The cooling gas supply source can provide a high pressure cooling gas. In order to remove the heat-exchanged gas from the processing device mount 25, the effect of lowering the temperature of the driving device is achieved, and an air outlet may be disposed on the lower end surface of the processing device mount 25 to facilitate the formation of a flow path and reduce the installation of the processing device. The temperature inside the seat 25. By inputting high-pressure cooling gas in the space in which the drive unit is located, the necessary cooling of the drive unit can be performed, the service life of the drive unit can be improved, and the invasion of external waste sand can be effectively prevented. Of course, a processing tool such as an operating handle such as an operator can be provided in the processing device mount 25, and the above-described cooling method can also provide a certain protective effect on the working mechanism of the operator. In order to better clean the processing device disposed under the processing device mount 25, such as the cutting tool 253, to prevent the sand after cutting from remaining on the tool to reduce the cutting efficiency of the tool, the cutting tool can be disposed above the cutting tool 253. Blowing nozzle 43 of 253. A second gas delivery pipe 45 is connected to the blowing nozzle 43, the gas source is also a high pressure cooling gas, and the second gas delivery pipe 45 is connected to the output end of the cooling gas supply source 40. The cutting tool 253 is connected to the rotor 254 of the electric spindle provided in the processing device mount 25 via the chuck 256, and is rotated at a high speed by the driving of the electric spindle. By the blow nozzle 43 facing the cutting tool 253, high pressure cooling can be performed. The gas is blown onto the cutting tool 253, and the debris on the cutting tool 253 is blown off to clean the cutting tool. For other types of processing tools such as an operator, the blow nozzle 43 can also be used to keep clean and cool. The blowing nozzle 43 may be mounted below the processing device mount 25, or may be mounted in the vicinity of the cutting tool 253 by other tools, as long as the cooling gas blown from the blowing nozzle 43 can ensure the debris on the cutting tool 253. Blow it off. According to another aspect of the present invention, there is also provided a five-axis motion system having an XYZ three-axis motion unit, further having the double swing head described above. As shown in Fig. 4, in order to explain the structure of the five-axis motion system provided by the present invention as a whole, the XYZ three-axis motion unit in the five-axis motion system provided by the present invention will be described below. The X-axis moving unit in the XYZ three-axis moving unit includes a first X-axis moving rail 11 and a second X-axis moving rail 13 which are disposed in parallel; two of the first X-axis moving rail 11 and the second X-axis moving rail 13 are respectively disposed a synchronously moving X-axis slider 12 and an X-axis slider connecting plate connected between the two X-axis sliders 12; the X-axis driving motor 15 simultaneously drives the first X-axis moving rail 11 through the X-axis driving lever 16 and The slider on the second X-axis motion guide 13 slides along the X-axis.

The x-axis moving unit in the three-axis moving unit includes a first x-axis moving rail 31 and a second x-axis motion 32 arranged in parallel, and the first x-axis moving rail 31 and the second x-axis moving rail 32 are respectively fixed by bolts The X-axis slide connecting plate on the first X-axis moving rail 11 and the second X-axis moving rail 13; the Υ-axis driving motor 33 simultaneously drives the first Υ-axis moving rail 31 and the second Υ shaft through the 传动 shaft transmission rod 34 The moving guide rail 32; the first x-axis moving rail 31 and the second cymbal moving rail 32 are respectively provided with two cymbal sliders 35 and a cymbal slider connecting plate connected between the two cymbal sliders 35.

The Ζ-axis motion unit includes a vertically-set Ζ-axis motion guide rail and a Ζ-axis motion slider (not shown) disposed on the Ζ-axis motion guide rail, and the Ζ-axis motion slider is fixedly connected with the Υ-axis slider connection plate, Ζ The shaft drive motor 53 is fixed on the upper part of the movement guide rail of the x-axis, and the movement block of the x-axis is relatively stationary in the direction of the x-axis, but the reciprocating movement of the main-axis movement guide rail relative to the x-axis movement slider in the x-axis direction, the x-axis movement guide The bottom of the shaft is provided with a cymbal base 52, and the C-axis drive unit 21 is connected to the yoke base 52 via a C-axis drive mount 213 (see FIG. 2). The cymbal base 52 is provided with a C-axis drive device, The C-axis driving device mount and the rotary table-sealed cymbal cover 51, and the C-axis drive mounting seat 213 can be fixed to the lower end of the cymbal base 52 by bolts. The five-axis motion system provided by the invention can realize the C-axis movement and the boring movement by using a common servo motor, and the cost is low, and can be applied to the moldless casting forming machine, so that the moldless casting forming machine can process the structural size. Large, complex cavity castings that are complex and difficult to machine. In addition, high-pressure cooling gas is introduced into the mounting seat of the processing device, so that the processing device and its driving device are cooled as necessary, and the intrusion of external waste sand is effectively prevented, and the processing device is cleaned well, and the processing device is improved. The overall service life. Applying the above five-axis motion system to the moldless casting molding machine can effectively solve the large-scale complex castings in the prior art moldless casting molding machine which cannot process large-sized structures, complicated cavity curved surfaces, and difficult to be formed. The problem of the mold and the manufacturing cost of the moldless casting machine are reduced. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A double oscillating head, characterized in that it comprises:

C-axis drive (21) with C-axis drive shaft (211);

The A-axis driving device (23) is connected to the C-axis driving shaft (211) through a first transmission mechanism, and synchronously rotates with the C-axis driving shaft (211), and has an A-axis driving shaft (231);

The processing device mount (25) is coupled to the output shaft of the A-axis drive unit (22) via a second transmission mechanism and swings in accordance with the rotation of the A-axis drive shaft (231).

2. The double oscillating head according to claim 1, wherein the first transmission mechanism comprises:

a C-axis drive mounting seat (213), the C-axis drive device (21) being disposed in the C-axis drive mounting seat (213);

a rotating table (215) disposed under the C-axis driving device mount (213), connected to the C-axis driving shaft (211) and synchronously rotating with the C-axis driving shaft (211), the A A shaft drive (23) is coupled to the rotary table (215).

3. The double oscillating head according to claim 2, wherein the C-axis driving device mount (213) has an axial step mounting hole coaxial with the C-axis driving shaft (211), The outer casing of the C-axis driving device (21) is stuck on the outer step of the axial step mounting hole, and the rotating table (215) has a convex portion (215a) extending into the axial step mounting hole. a boss portion (215a) is sleeved on an outer circumference of the C-axis drive shaft (211) and connected to the C-axis drive shaft (211), and an outer circumference of the boss portion (215a) and the axial direction A roller bearing (217) is disposed between the inner walls of the step mounting holes.

4. The double oscillating head according to claim 2, wherein the A-axis drive shaft (231) extends through the processing device mount (25), and the second transmission mechanism includes a sleeve disposed on the A a drive flange (257) of the first end of the shaft drive shaft (231), the drive flange (257) is keyed to the A-axis drive shaft (231), and the orientation of the drive flange (257) The end surface of the processing device mount (25) is fixedly connected to the processing device mount (25).

The double oscillating head according to claim 4, wherein an A-axis driving device mount is disposed below the rotating table (215), and an outer casing of the A-axis driving device (23) is fixed to the An outer side of the A-axis drive mounting seat, the A-axis drive shaft (231) penetrating the A-axis drive mounting seat,

8 The drive flange (257) is disposed between the first side wall (233) of the A-axis drive mount and the first side wall of the processing device mount (25).

6. The double oscillating head according to claim 5, wherein a middle portion of the second side wall (235) of the A-axis driving device mount is disposed coaxially with the A-axis driving shaft (231) a through hole, a second end of the A-axis drive shaft (231) is disposed in the through hole, a second side wall (235) of the A-axis drive mounting seat and the processing device mount (25) Provided between the second side wall is a support flange (259) fixed to the second side wall of the processing device mount (25), the support flange (259) having an extension into the through hole and located A support portion on an outer circumference of the A-axis drive shaft (231), and a deep groove ball bearing (258) is disposed between an outer circumference of the support portion and an inner wall of the through hole.

7. The double oscillating head according to claim 6, wherein the A-axis driving device mount further comprises a base, the first side wall (233) is integrally formed with the base, and the A-axis drive A second side wall (235) of the device mount is detachably coupled to the base.

The double oscillating head according to any one of claims 1 to 7, wherein the C-axis driving device

(21) and the A-axis drive unit (23) are servo motors.

The double oscillating head according to any one of claims 1 to 7, characterized in that the processing device mounting seat (25) is provided with an air inlet, and the processing device mounting seat (25) An air outlet is provided below, and the air inlet is connected to the cooling gas supply source (40) through the first air pipe (41).

The double oscillating head according to claim 9, wherein a processing device is disposed under the processing device mount (25), and a blowing nozzle facing the processing device is disposed above the processing device

(43), the blowing nozzle (43) is connected to the cooling gas supply source (40) through the second gas delivery pipe (45).

A five-axis motion system, comprising an XYZ three-axis motion unit, further comprising the double swing head according to any one of claims 1 to 10, wherein the double swing head is disposed on the XYZ three-axis On the Z-axis motion unit in the motion unit.

12. The five-axis motion system according to claim 11, wherein the C-axis driving device (21) of the double-swing head is fixed to the Z-axis motion by a C-axis driving device mount (213) The Z-axis motion slider in the unit.