CN110744337A

CN110744337A - B-axis milling head structure and processing machine tool

Info

Publication number: CN110744337A
Application number: CN201911129902.4A
Authority: CN
Inventors: 王永兴; 张博; 梁毅; 周昊晖
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-02-04

Abstract

The invention provides a B-axis milling head structure and a processing machine tool. Wherein, B axle cutter head structure includes: milling the head upper body; the torque motor is arranged in the upper body of the milling head and comprises a stator and a rotor arranged in the stator, the stator is connected with the upper body of the milling head, and the rotation axis of the rotor forms an included angle with the vertical direction; the connecting flange is fixedly connected with the rotor; the milling head lower part of the body, milling head lower part of the body and flange fixed connection to through rotor drive milling head lower part of the body relative to milling head upper part of the body rotation. The technical scheme of the invention solves the problem of short service life of the B-axis milling head in the prior art.

Description

B-axis milling head structure and processing machine tool

Technical Field

The invention relates to the technical field of five-axis machining tools, in particular to a B-axis milling head structure and a machining tool.

Background

In the related technology, the B-axis milling head structure adopts a servo motor to drive the milling head lower body to rotate through a speed reducing mechanism such as a synchronous belt or a gear, reverse errors exist in the transmission process due to indirect transmission, and the problems of part abrasion and the like exist in contact transmission, so that the service life of the B-axis milling head structure is influenced.

Disclosure of Invention

The invention mainly aims to provide a B-axis milling head structure to solve the problem that the service life of a B-axis milling head in the prior art is short.

In order to achieve the above object, according to an aspect of the present invention, there is provided a B-axis milling head structure including: milling the head upper body; the torque motor is arranged in the upper body of the milling head and comprises a stator and a rotor arranged in the stator, the stator is connected with the upper body of the milling head, and the rotation axis of the rotor forms an included angle with the vertical direction; the connecting flange is fixedly connected with the rotor; the milling head lower part of the body, milling head lower part of the body and flange fixed connection to through rotor drive milling head lower part of the body relative to milling head upper part of the body rotation.

Furthermore, the milling head upper body is provided with a mounting hole, the stator is mounted in the mounting hole, a cooling channel is arranged between the hole wall of the mounting hole and the peripheral wall of the stator, and the milling head upper body is provided with a liquid inlet channel communicated with the cooling channel and a liquid outlet channel communicated with the cooling channel.

Furthermore, a cooling groove is formed in the peripheral wall of the stator and is a cooling channel; wherein, the cooling tank is annular or the cooling tank is spiral.

Further, the B-axis milling head structure further comprises: the first sealing ring is arranged between the hole wall of the mounting hole and the outer peripheral wall of the stator; along the rotation axis of the rotor, two first sealing rings are arranged at intervals, and a cooling channel is arranged between the two first sealing rings.

Further, the B-axis milling head structure further comprises: the locking ring is fixedly connected with the milling head lower body; and the pneumatic clamp is fixedly connected with the milling head upper body and has a clamping state for clamping the locking ring and a non-clamping state for allowing the milling head lower body to rotate relative to the milling head upper body.

Further, the B-axis milling head structure further comprises: the fixed flange is fixedly connected with the milling head upper body and the stator; the encoder comprises an encoder body and a rotating shaft, the rotating shaft is rotatably arranged relative to the encoder body, and the encoder body is fixedly connected with the fixed flange and is positioned in the upper body of the milling head; the connecting rod penetrates through the rotor, one end of the connecting rod is connected with the rotating shaft, and the other end of the connecting rod is fixedly connected with the connecting flange; the cover body covers the milling head upper body.

Further, the B-axis milling head structure further comprises: the inner ring of the turntable bearing is fixedly connected with the lower body of the milling head, and the outer ring of the turntable bearing is fixedly connected with the upper body of the milling head.

Further, the milling head lower body is provided with a protrusion which is arranged in an annular shape, the milling head upper body is provided with a recess which is arranged in an annular shape, and at least part of the protrusion extends into the recess.

Further, the B-axis milling head structure further comprises a second sealing ring, and the second sealing ring is arranged between the peripheral wall of the protruding portion and the peripheral wall of the concave portion.

According to another aspect of the invention, a processing machine tool is provided, which comprises a B-axis milling head structure.

By applying the technical scheme of the invention, the upper milling head body and the lower milling head body are directly driven by the torque motor without reverse gaps, and the problem of abrasion of a transmission part does not exist in a non-contact transmission mode. The application provides a B axle cutter head structure has advantages such as transmission is steady, the precision is high and long service life.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a cross-sectional structural view of a B-axis milling head configuration according to an alternative embodiment of the present invention;

fig. 2 shows an enlarged schematic view of the structure at a in fig. 1.

Wherein the figures include the following reference numerals:

10. milling the head upper body; 11. mounting holes; 121. a liquid inlet channel; 122. a liquid outlet channel; 13. a recess; 20. a torque motor; 21. a stator; 211. a cooling channel; 22. a rotor; 30. a connecting flange; 40. a milling head lower body; 41. a projection; 50. a first seal ring; 60. locking a ring; 70. pneumatic clamping jaws; 80. a fixed flange; 90. an encoder; 91. an encoder body; 92. a rotating shaft; 93. an encoder nut; 100. a connecting rod; 110. a cover body; 111. an upper cover; 112. a side cover; 120. a turntable bearing; 130. a second seal ring; 140. a pipe joint; 150. a plug; 160. an electric spindle; 170. a spindle shield; 180. and a third sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a B-axis milling head structure and a processing machine tool, aiming at solving the problem that the service life of a B-axis milling head in the prior art is short.

As shown in fig. 1 to 2, the B-axis milling head structure includes: a milling head upper body 10; the torque motor 20 is installed in the milling head upper body 10, the torque motor 20 comprises a stator 21 and a rotor 22 arranged in the stator 21, the stator 21 is connected with the milling head upper body 10, and the rotating axis of the rotor 22 forms an included angle with the vertical direction; the connecting flange 30, the connecting flange 30 is fixedly connected with the rotor 22; the milling head lower body 40, the milling head lower body 40 and the connecting flange 30 are fixedly connected, so that the milling head lower body 40 is driven by the rotor 22 to rotate relative to the milling head upper body 10.

In the present embodiment, the milling head upper body 10 and the milling head lower body 40 are directly driven by the torque motor 20 without reverse clearance, and the non-contact transmission mode has no problem of the abrasion of transmission parts. The application provides a B axle cutter head structure has advantages such as transmission is steady, the precision is high and long service life.

As shown in fig. 1, the milling head upper body 10 has a mounting hole 11, the stator 21 is mounted in the mounting hole 11, a cooling channel 211 is provided between the wall of the mounting hole 11 and the outer peripheral wall of the stator 21, and the milling head upper body 10 is provided with a liquid inlet channel 121 communicated with the cooling channel 211 and a liquid outlet channel 122 communicated with the cooling channel 211. Therefore, the cooling liquid enters the cooling channel 211 through the liquid inlet channel 121, flows out of the liquid outlet channel 122 after cooling the torque motor 20, and takes away heat generated by the torque motor 20 during working, so that the service life of the B-axis milling head structure is prolonged.

As shown in fig. 1, the outer peripheral wall of the stator 21 is provided with cooling grooves which are cooling channels 211; wherein, the cooling groove is arranged annularly. Thus, the cooling groove is easy to process, and the cooling effect on the torque motor 20 is improved by using the cooling groove which is annularly arranged.

As shown in fig. 1, the plurality of cooling grooves arranged in a ring shape are provided at intervals in the axial direction of the rotor 22, and the plurality of cooling grooves communicate with each other. In this way, by providing a plurality of cooling grooves, the length of the cooling passage 211 of the cooling liquid is increased, and the cooling effect of the cooling liquid on the torque motor 20 is improved.

In an alternative embodiment of the present application, not shown, the cooling channels are arranged in a spiral. Like this, be the one end and the inlet channel 121 intercommunication of the cooling trough of heliciform setting, be the other end and the liquid outlet channel 122 intercommunication of the cooling trough of heliciform setting, cooling channel 211 processes conveniently, and the cooling effect is good.

As shown in fig. 1, the B-axis milling head structure further includes a first sealing ring 50, and the first sealing ring 50 is disposed between the hole wall of the mounting hole 11 and the outer circumferential wall of the stator 21; along the rotational axis of the rotor 22, two first sealing rings 50 are provided at intervals, and a cooling passage 211 is provided between the two first sealing rings 50. In this way, the two first sealing rings 50 prevent the liquid in the cooling channel 211 from leaking to other positions, which affects the use safety of the B-axis milling head structure.

In specific implementation, as shown in fig. 1, the B-axis milling head structure further includes a pipe joint 140 and a plug 150, the pipe joint 140 is disposed at an end of the liquid outlet channel 122 away from the cooling channel 211, the pipe joint 140 is configured to communicate with an external pipeline, and the plug 150 is disposed at an end of the liquid inlet channel 121 away from the cooling channel 211.

As shown in fig. 1, the B-axis milling head structure further includes a locking ring 60 and a pneumatic clamp 70, the locking ring 60 is fixedly connected to the milling head lower body 40, the pneumatic clamp 70 is fixedly connected to the milling head upper body 10, and the pneumatic clamp 70 has a clamping state for clamping the locking ring 60 and a non-clamping state for allowing the milling head lower body 40 to rotate relative to the milling head upper body 10. Therefore, when the B-axis milling head structure is in a power-off state or in a powerful cutting state, the pneumatic clamp 70 is enabled to clamp the locking ring 60, the locking ring 60 and the milling head lower body 40 are prevented from rotating relative to the milling head upper body 10, the safety performance of the B-axis milling head structure is improved, and the processing performance of the B-axis milling head structure is improved.

The locking ring 60 is arranged to prevent the pneumatic clamp 70 from directly clamping the milling head lower body 40, which may cause deformation or abrasion of the milling head lower body 40. When the locking ring 60 is damaged after long-term use, the B-axis milling head structure can be maintained by replacing the locking ring 60. The pneumatic clamp 70 has the advantages of safety and environmental protection, and even a small amount of gas leaks, the B-axis milling head structure cannot be damaged.

In practice, the locking ring 60 is detachably connected to the milling head lower body 40 by screws, so as to facilitate the replacement of the locking ring 60.

As shown in fig. 1, the B-axis milling head structure further includes a fixing flange 80, an encoder 90, a connecting rod 100 and a cover body 110, the fixing flange 80 is fixedly connected with the milling head upper body 10 and the stator 21, the encoder 90 includes an encoder body 91 and a rotating shaft 92, the rotating shaft 92 is rotatably disposed relative to the encoder body 91, the encoder body 91 is fixedly connected with the fixing flange 80 and is located in the milling head upper body 10, the connecting rod 100 is arranged in the rotor 22 in a penetrating manner, one end of the connecting rod 100 is connected with the rotating shaft 92, the other end of the connecting rod 100 is fixedly connected with the connecting flange 30, and the cover body 110 covers the milling head upper body 10. Thus, when the rotor 22 of the torque motor 20 rotates relative to the stator 21 of the torque motor 20 and the milling head upper body 10, the rotor 22 drives the milling head lower body 40 and the connecting rod 100 to rotate synchronously, the connecting rod 100 drives the rotating shaft 92 to rotate relative to the encoder body 91, the encoder body 91 is matched with the rotating shaft 92, and an electric signal is sent outwards according to the rotating angle of the rotating shaft 92, so that the rotating angle of the milling head lower body 40 is detected through the encoder 90.

In specific implementation, the processing machine further includes a controller, and the controller is electrically connected to both the encoder 90 and the torque motor 20 to control the operating state of the torque motor 20 according to the rotation angle of the milling head lower body 40 detected by the encoder 90, so as to realize feedback adjustment of the rotation angle of the milling head lower body 40.

When the encoder 90 is specifically implemented, the encoder nut 93 is further included, the encoder nut 93 is fixedly connected with the rotating shaft 92, one end of the connecting rod 100 is in threaded connection with the encoder nut 93, the connecting rod 100 is connected with the rotating shaft 92 through the encoder nut 93, and the connection is simple and reliable.

In specific implementation, the cover body 110 includes an upper cover 111 and a side cover 112,

in specific implementation, the upper cover 111 is connected with the side cover 112 and the milling head upper body 10 through screws, a third sealing ring 180 is arranged on the upper cover 111, the third sealing ring 180 is used for sealing the connection position of the upper cover 111 and the milling head upper body 10, and meanwhile, the third sealing ring 180 is used for sealing the connection position of the upper cover 111 and the side cover 112.

As shown in fig. 1 and 2, the B-axis milling head structure further includes a turntable bearing 120, an inner ring of the turntable bearing 120 is fixedly connected to the milling head lower body 40, and an outer ring of the turntable bearing 120 is fixedly connected to the milling head upper body 10. By arranging the turntable bearing 120, the milling head lower body 40 can stably and reliably rotate relative to the milling head upper body 10, and abrasion of the milling head lower body 40 and the milling head upper body 10 is avoided.

As shown in fig. 2, the milling head lower body 40 has a projection 41 arranged in a ring shape, the milling head upper body 10 has a recess 13 arranged in a ring shape, and at least a portion of the projection 41 protrudes into the recess 13. Therefore, when the milling head lower body 40 and the milling head upper body 10 are assembled, the projections 41 and the recesses 13 can be used for positioning, so that the assembly efficiency is improved, and the coaxiality of the milling head lower body 40 and the milling head upper body 10 is ensured.

As shown in fig. 2, the B-axis milling head structure further includes a second seal ring 130, and the second seal ring 130 is disposed between the outer peripheral wall of the projection 41 and the outer peripheral wall of the recess 13. In this way, the arrangement of the second seal ring 130 further improves the sealing performance of the B-axis milling head structure.

As shown in fig. 1 and 2, the protruding portion 41 is located on the outer peripheral side of the turntable bearing 120, and the provision of the protruding portion 41 and the second seal ring 130 can prevent leakage of the lubricating oil when the turntable bearing 120 is lubricated.

As shown in fig. 1, the liquid inlet channel 121 and the liquid outlet channel 122 both extend in the horizontal direction, and the liquid inlet channel 121 and the liquid outlet channel 122 are arranged in parallel in the vertical direction.

In specific implementation, as shown in fig. 1, the encoder 90 is connected to a fixed flange 80 by a screw, the fixed flange 80 is connected to the stator 21 of the torque motor 20 and the milling head upper body 10 by a screw, a connecting rod 100 is connected to the connecting flange 30 by a screw, the connecting rod 100 is connected to a rotating shaft 92 rotating in the encoder body 91 by an encoder nut 93, the connecting flange 30 is connected to the rotor 22 of the torque motor 20 by a screw, the connecting flange 30 is connected to the milling head lower body 40 by a screw, a locking ring 60 is connected to the milling head lower body 40 by a screw, a pneumatic clamp 70 is connected to the milling head upper body 10 by a screw, an inner ring of a turntable bearing 120 is connected to the milling head lower body 40 by a screw, an outer ring of the turntable bearing 120 is connected to the milling head upper body 10 by a screw, the milling head upper body 10 and the milling head lower body 40 are sealed by a second sealing ring 130, an electric spindle 160 is connected, the spindle guard 170 is connected to the milling head lower body 40 by screws.

The application still provides a machine tool, and machine tool includes B axle cutter head structure, and B axle cutter head structure is foretell B axle cutter head structure. Because the B axle cutter head structure that this application provided has advantages such as life height, do not have reverse clearance to be favorable to promoting machine tool's life and performance.

Optionally, the machine tool is a vertical-horizontal conversion five-axis linkage machine tool.

The application provides a B axle cutter head structure adopts torque motor 20 as the power supply, adopts direct drive and non-contact transmission promptly, and direct drive can avoid touching the in-process and have reverse error, and the part wearing and tearing can be avoided in the non-contact transmission to make the B axle cutter head structure that this application provided have the advantage that the precision is high and long service life. In addition, the B-axis milling head structure provided by the application adopts the pneumatic clamp 70 to lock in a power-off state or a powerful cutting state, adopts the encoder 90 to measure the rotation angle, adopts the turntable bearing 120 to install, rotate and position, adopts the cooling channel 211, the liquid inlet channel 121 and the liquid outlet channel 122 to cooperate to cool the torque motor 20, and further improves the service performance of the B-axis milling head structure.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

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 may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A B-axis milling head structure, comprising:

a milling head upper body (10);

the torque motor (20) is installed in the milling head upper body (10), the torque motor (20) comprises a stator (21) and a rotor (22) arranged in the stator (21), the stator (21) is connected with the milling head upper body (10), and the rotating axis of the rotor (22) forms an included angle with the vertical direction;

a connecting flange (30), wherein the connecting flange (30) is fixedly connected with the rotor (22);

the milling head lower part of the body (40), the milling head lower part of the body (40) with flange (30) fixed connection, in order to pass through rotor (22) drive the milling head lower part of the body (40) for the milling head upper part of the body (10) rotates.

2. The B-axis milling head structure according to claim 1, wherein the milling head upper body (10) is provided with a mounting hole (11), the stator (21) is mounted in the mounting hole (11), a cooling channel (211) is arranged between the wall of the mounting hole (11) and the outer peripheral wall of the stator (21), and a liquid inlet channel (121) communicated with the cooling channel (211) and a liquid outlet channel (122) communicated with the cooling channel (211) are arranged on the milling head upper body (10).

3. The B-axis milling head structure of claim 2,

a cooling groove is formed in the peripheral wall of the stator (21), and the cooling groove is the cooling channel (211);

wherein, the cooling tank is the annular setting or the cooling tank is the heliciform setting.

4. The B-axis milling head structure of claim 2, further comprising:

a first seal ring (50), wherein the first seal ring (50) is arranged between the hole wall of the mounting hole (11) and the outer peripheral wall of the stator (21); along the rotation axis of the rotor (22), two first sealing rings (50) are arranged at intervals, and the cooling channel (211) is arranged between the two first sealing rings (50).

5. The B-axis milling head structure of claim 1, further comprising:

the locking ring (60), the said locking ring (60) is fixedly connected with said milling head lower body (40);

the pneumatic clamp (70), the pneumatic clamp (70) is fixedly connected with the milling head upper body (10), and the pneumatic clamp (70) has a clamping state for clamping the locking ring (60) and a non-clamping state for allowing the milling head lower body (40) to rotate relative to the milling head upper body (10).

6. The B-axis milling head structure of claim 1, further comprising:

the fixed flange (80), the fixed flange (80) is fixedly connected with the milling head upper body (10) and the stator (21);

the encoder (90) comprises an encoder body (91) and a rotating shaft (92), the rotating shaft (92) is rotatably arranged relative to the encoder body (91), and the encoder body (91) is fixedly connected with the fixing flange (80) and is positioned in the milling head upper body (10);

the connecting rod (100) penetrates through the rotor (22), one end of the connecting rod (100) is connected with the rotating shaft (92), and the other end of the connecting rod (100) is fixedly connected with the connecting flange (30);

the cover body (110), the cover body (110) is arranged on the milling head upper body (10) in a covering mode.

7. The B-axis milling head structure of claim 1, further comprising:

the inner ring of the turntable bearing (120) is fixedly connected with the milling head lower body (40), and the outer ring of the turntable bearing (120) is fixedly connected with the milling head upper body (10).

8. The B-axis milling head structure of claim 1,

the milling head lower body (40) is provided with a protrusion (41) which is arranged in an annular shape, the milling head upper body (10) is provided with a recess (13) which is arranged in an annular shape, and at least part of the protrusion (41) extends into the recess (13).

9. The B-axis milling head structure according to claim 8, further comprising a second seal ring (130), wherein the second seal ring (130) is disposed between the peripheral wall of the protrusion (41) and the peripheral wall of the recess (13).

10. A machine tool comprising a B-axis milling head structure, wherein the B-axis milling head structure is according to any one of claims 1 to 9.