CN218656990U

CN218656990U - Universal milling head of gantry machining center and machine tool

Info

Publication number: CN218656990U
Application number: CN202223265495.XU
Authority: CN
Inventors: 崔承潭; 高鑫
Original assignee: Suzhou Sky Automation Technology Co ltd
Current assignee: Suzhou Sky Automation Technology Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-03-21
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses an universal cutter head of longmen machining center and lathe belongs to the lathe field, including main shaft drive part, box, universal cutter head joint, external encoder, main shaft drive part includes the main shaft, spindle motor and speed reducer, and the main shaft, spindle motor all install inside the box with the speed reducer, and speed reducer one end is connected with spindle motor, and the other end is connected with the main shaft, and universal cutter head joint is installed at the box outsidely, and external encoder installs inside the box, and external encoder one end is connected with the main shaft, and the other end is connected with universal cutter head joint. By adopting the transmission mode, the output torque is ensured to be large enough, the external encoder is equivalent to a sensor of the shaft A, the positioning precision of the shaft A can be improved, the processing precision and stability are improved, the quality of a processed surface is ensured, and the production efficiency is improved. The application also relates to a machine tool comprising the universal milling head of the gantry machining center.

Description

Universal milling head of gantry machining center and machine tool

Technical Field

The utility model belongs to the technical field of the lathe and specifically relates to an universal cutter head of longmen machining center and lathe is related to.

Background

In the gantry machining center structure of the existing numerical control milling machine, a universal milling head is often required to be used, but the space in a main shaft box is limited, a motor with too large diameter cannot be installed, the A shaft of the universal milling head needs larger torque for positioning, and if the torque is insufficient, the positioning time is long or the positioning is inaccurate. The existing universal milling head has the problem that the A shaft is inaccurately positioned, so that the machining precision is low, the quality of a machined surface is influenced, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an improve the universal milling head of gantry machining center of A axle positioning accuracy.

In order to overcome the defects of the prior art, the second objective of the utility model is to provide a machine tool for improving the positioning precision of the A shaft.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

the universal milling head of the gantry machining center comprises a spindle transmission part, a box body, a universal milling head joint and an external encoder, wherein the spindle transmission part comprises a spindle, a spindle motor and a speed reducer, the spindle motor and the speed reducer are all installed inside the box body, one end of the speed reducer is connected with the spindle motor, the other end of the speed reducer is connected with the spindle, the universal milling head joint is installed outside the box body, the external encoder is installed inside the box body, one end of the external encoder is connected with the spindle, and the other end of the external encoder is connected with the universal milling head joint.

Furthermore, the spindle transmission part further comprises a speed reducer fixing plate, and the speed reducer is fixed inside the box body through the speed reducer fixing plate.

Further, the spindle transmission part further comprises a coupler, and the speed reducer is connected with the spindle through the coupler.

Furthermore, the universal milling head of the gantry machining center further comprises a C-axis sensor, the C-axis sensor is installed inside the box body, and the C-axis sensor is installed outside the box body and connected with the universal milling head joint.

Further, the external encoder comprises a counter gear, a sensor and a sensor support, the sensor is fixed inside the box body through the sensor support, and the counter gear is connected with the spindle.

Furthermore, the universal milling head of the gantry machining center further comprises a Z-axis moving part, the Z-axis moving part comprises a Z-axis motor, a Z-axis linear guide rail and a lead screw, the Z-axis motor is installed at the top of the box body, the Z-axis linear guide rail is installed outside the box body and fixedly connected with the box body, and the lead screw is installed inside the box body and connected with the Z-axis motor.

Furthermore, the Z-axis moving part comprises a ram, a screw nut and a Z-axis linear guide slider, the ram is installed on the cross beam and passes through the Z-axis linear guide slider and the box body is fixedly connected, and the screw nut is installed inside the box body and fixedly connected with the ram.

Furthermore, the universal milling head of the gantry machining center further comprises a Z-axis balancing part, the Z-axis balancing part comprises a balancing cylinder and a balancing cylinder fixing part, the balancing cylinder is installed on one side of the box body through the balancing cylinder fixing part, and the balancing cylinder is provided with an oil discharge hole and an oil inlet hole.

Furthermore, the Z-axis balance component further comprises a balance cylinder pull rod support and a balance cylinder pull rod, the balance cylinder pull rod support is located at the top of the box body, one end of the balance cylinder pull rod is connected with the balance cylinder, and the other end of the balance cylinder pull rod is fixedly connected with the balance cylinder pull rod support.

The second purpose of the utility model is realized by adopting the following technical scheme:

a machine tool comprises the universal milling head of any gantry machining center.

Compared with the prior art, the utility model discloses longmen machining center universal milling head includes spindle drive part, box, universal milling head joint, external encoder, and spindle drive part includes main shaft, spindle motor and speed reducer, and main shaft, spindle motor and speed reducer are all installed inside the box, and speed reducer one end is connected with spindle motor, and the other end is connected with the main shaft, and universal milling head joint installs outside the box, and external encoder installs inside the box and be connected with universal milling head joint. The main shaft motor transmits output torque to the main shaft through the speed reducer and the coupler, the output torque is guaranteed to be large enough by adopting the transmission mode, the external encoder is equivalent to a sensor of the shaft A, one end of the external encoder is connected with the main shaft, and the other end of the external encoder is connected with the universal milling head joint. The spindle motor encoder and the external encoder can be used for feeding back signals, and the positioning precision of the shaft A can be improved through the structural arrangement, so that the machining precision and stability are improved, the quality of a machined surface is ensured, and the production efficiency is improved; the external encoder and the C-axis sensor can output and transmit electric signals to the universal milling head joint, so that multi-angle machining of a machined part is realized; install Z axle motor on the box top, lead screw and Z axle linear guide install on the box, and Z axle linear guide slider and screw-nut are fixed on the ram, and the ram size is unchangeable basically like this, have improved the rigidity and the stability of this universal milling head's Z axle driving chain, through carrying out dynamic pressure compensation to the balance cylinder for the Z axle keeps balanced in the motion process, increase of service life, work safe and reliable, the maintenance cost is low.

Drawings

FIG. 1 is a schematic structural view of the universal milling head of the gantry machining center of the present invention;

FIG. 2 is an enlarged view of the universal milling head A of the gantry machining center of FIG. 1;

fig. 3 is an enlarged view of the universal milling head B of the gantry machining center of fig. 1.

In the figure: 10. a spindle drive component; 11. a spindle motor; 12. a speed reducer; 13. a speed reducer fixing plate; 14. a coupling; 15. a main shaft; 20. a box body; 30. a universal milling head joint; 40. a C-axis sensor; 50. an external encoder; 51. a counter gear; 52. a sensor; 53. a sensor holder; 60. a Z-axis moving part; 61. a Z-axis motor; 62. a ram; 63. a Z-axis linear guide rail; 64. a screw rod; 65. a feed screw nut; 66. a Z-axis linear guide rail slider; 70. a Z-axis balance member; 71. a balancing cylinder; 711. an oil discharge hole; 712. an oil inlet hole; 72. a balance cylinder fixing member; 73. a balance cylinder pull rod support; 74. a balance cylinder pull rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by the intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1-3 show the universal milling head of gantry machining center of the present invention, which includes a spindle transmission part 10, a box 20, a universal milling head joint 30, a C-axis sensor 40, an external encoder 50, a Z-axis moving part 60, and a Z-axis balancing part 70.

In a horizontal type machine tool, generally, an axis having a movement direction parallel to a main shaft axis is referred to as a Z axis, an axis having a movement direction parallel to a machine tool moving table and perpendicular to the Z axis is referred to as an X axis, a member performing a rotational motion around the Z axis is referred to as a C axis, and a member performing a rotational motion around the X axis is referred to as an a axis.

In this embodiment:

the spindle drive unit 10 includes a spindle motor 11, a speed reducer 12, a speed reducer fixing plate 13, a coupling 14, and a spindle 15.

The spindle motor 11 is installed inside the box 20, and the spindle motor 11 is in transmission connection with the spindle 15.

The speed reducer 12 is installed inside the box 20, the output end of the spindle motor 11 is connected with the speed reducer 12, and the speed reducer 12 can reduce the rotating speed of the spindle motor 11 and increase the output torque. Because the internal space of the box body 20 is limited, the spindle motor 11 with a larger diameter cannot be installed to improve the output torque of the motor, the speed reducer 12 is additionally installed at the output end of the spindle motor 11, so that the speed reduction positioning can be carried out by using the low gear of the speed reducer 12 when the A shaft is positioned, and after the positioning is finished, the low gear or the high gear of the speed reducer 12 can be selected according to the processing requirement. In this embodiment, the speed reducer 12 is a planetary speed reducer, and has the advantages of light weight, small size, large transmission ratio range, high efficiency, stable operation, low noise, strong adaptability, and better use effect.

The reducer fixing plate 13 is mounted inside the case 20, and the reducer 12 is fixed inside the case 20 through the reducer fixing plate 13.

The coupling 14 is installed between the speed reducer 12 and the main shaft 15, and the coupling 14 can play a role in transmitting rotating torque, compensating installation deviation between shafts, absorbing equipment vibration, buffering load impact and the like. In the present embodiment, the torque of the speed reducer 12 is transmitted to the main shaft 15 through the coupling 14.

The universal milling head joint 30 is mounted outside the housing 20 and is located at the bottom of the housing 20.

The C-axis sensor 40 is arranged outside the box body 20, and the C-axis sensor 40 is electrically connected with the universal milling head joint 30 and used for outputting and transmitting an electric signal to the universal milling head joint 30, so that multi-angle machining of a machined part is achieved.

The external encoder 50 is installed inside the box 20, one end of the external encoder 50 is connected with the spindle 15, and the other end is connected with the universal milling head joint 30. The external encoder 50 includes a counter gear 51, a sensor 52, and a sensor holder 53. The counter gear 51 is connected with the spindle 15, the sensor 52 is fixed inside the box body 20 through the sensor support 53, due to structural limitation, the universal milling head only has the C shaft provided with the sensor, the A shaft is not provided with the sensor, and the A shaft needs to be positioned by a spindle motor encoder to feed back signals. After the speed reducer 12 is installed, the distance between the spindle motor 11 and the universal milling head joint 30 is not 1:1 equal proportion carries out the transmission, only relies on the spindle motor encoder to feed back the signal, can cause A axle positioning error, consequently through external encoder 50's setting, both can realize that A axle location is quick, accurate, does not occupy the inside great space of box 20 again, saves area.

The Z-axis moving part 60 includes a Z-axis motor 61, a ram 62, a Z-axis linear guide 63, a lead screw 64, a lead screw nut 65, and a Z-axis linear guide slider 66.

The Z-axis motor 61 is installed outside the case 20 and on the top of the case 20.

The ram 62 is mounted on the cross member and fixedly connected to the housing 20, and the ram 62 as a moving part can be used to mount various functional parts.

The Z-axis linear guide 63 is installed outside the case 20 and is fixedly connected to the case 20.

The lead screw 64 is installed inside the case 20 and connected to the Z-axis motor 61.

The feed screw nut 65 is mounted inside the box 20 and is fixedly connected to the ram 62.

The Z-axis linear guide rail sliding block 66 is installed outside the box body 20, and the ram 62 is fixedly connected with the ram 62 through the Z-axis linear guide rail sliding block 66. The arrangement of the Z-axis moving part 60 enables the size of the ram 62 to be basically unchanged, so that the rigidity of the Z-axis transmission chain is ensured, and the dynamic performance of the transmission chain is improved. In the embodiment, the Z-axis linear guide rail 63 is a roller linear guide rail, so that the friction resistance is low, the bearing capacity is high, and the performance is more stable; the number of Z-axis linear guide slides 66 is 6.

The Z-axis balancing component 70 comprises a balancing cylinder 71, a balancing cylinder fixing piece 72, a balancing cylinder pull rod bracket 73 and a balancing cylinder pull rod 74.

The balance cylinder 71 is located at one side of the box body 20 and is fixedly connected with the ram 62 through a balance cylinder fixing member 72, the upper end of the balance cylinder 71 is provided with an oil discharge hole 711, the lower end of the balance cylinder is provided with an oil inlet 712, and the oil discharge hole 711 and the oil inlet 712 are connected to a nitrogen gas cylinder through a high-pressure pipe. In this embodiment, the number of the balancing cylinders 71 is 2, and the balancing cylinders 71 are installed at opposite sides of the case 20.

The balance cylinder pull rod support 73 is positioned at the top of the box body 20, one end of the balance cylinder pull rod support 73 is fixedly connected with the box body 20, and the other end of the balance cylinder pull rod support 73 is connected with the universal joint.

The balance cylinder pull rod 74 is connected with the balance cylinder 71 and is positioned above the balance cylinder 71, and the balance cylinder pull rod 74 is fixedly connected with the balance cylinder pull rod bracket 73 through a universal joint. In this embodiment, when the ram moves downward, the nitrogen gas cylinder supplies oil to the balance cylinder 71, and the balance cylinder rod 74 extends. When the machine head moves upward, the balance cylinder 71 discharges oil to the nitrogen gas cylinder, and the balance cylinder rod 74 retracts. When the pointer of the pressure gauge of the electrical contact on the nitrogen cylinder is lower than the set pressure, the electromagnetic valve of the hydraulic station is switched on, and the hydraulic station supplements pressure to the nitrogen cylinder through the high-pressure pipe; when the pointer of the electric contact pressure gauge is higher than the set pressure, the electromagnetic valve is disconnected, and pressure supplement is stopped.

In the application, the spindle motor 11 transmits output torque to the spindle 15 through the speed reducer 12 and the coupler 14, the transmission mode is adopted to ensure that the output torque is large enough, the external encoder 50 is equivalent to a sensor of an A shaft, one end of the external encoder 50 is connected with the spindle 15, the other end of the external encoder 50 is connected with the universal milling head joint 30, the spindle motor encoder and the external encoder 50 can be used for feeding back signals, and the positioning precision of the A shaft can be improved through the structural arrangement, so that the processing precision and the stability are improved, the quality of a processed surface is ensured, and the production efficiency is improved; the external encoder 50 and the C-axis sensor 40 can output and transmit the electric signal to the universal milling head joint 30, so that multi-angle machining of a machined part is realized; the Z-axis motor 61 is installed at the top end of the box body 20, the lead screw 64 and the Z-axis linear guide rail 63 are installed on the box body 20, the Z-axis linear guide rail sliding block 66 and the lead screw nut 65 are fixed on the ram 62, so that the size of the ram 62 is basically unchanged, the rigidity and the stability of a Z-axis transmission chain of the universal milling head are improved, and the balance cylinder 71 is dynamically pressurized, so that the Z-axis keeps balance in the movement process, the service life is prolonged, the operation is safe and reliable, and the maintenance cost is low.

The application also relates to a machine tool comprising the universal milling head of the gantry machining center.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements may be made, all according to the equivalent modifications and evolutions of the present invention, which are made to the above embodiments by the essential technology, and all belong to the protection scope of the present invention.

Claims

1. The utility model provides a universal milling head of longmen machining center, includes spindle drive part, box, universal milling head joint, its characterized in that: the universal milling head comprises a box body, and is characterized by further comprising an external encoder, wherein the main shaft transmission part comprises a main shaft, a main shaft motor and a speed reducer, the main shaft motor and the speed reducer are all installed inside the box body, one end of the speed reducer is connected with the main shaft motor, the other end of the speed reducer is connected with the main shaft, the universal milling head joint is installed outside the box body, the external encoder is installed inside the box body, one end of the external encoder is connected with the main shaft, and the other end of the external encoder is connected with the universal milling head joint.

2. The universal milling head of gantry machining center of claim 1, wherein: the main shaft transmission part further comprises a speed reducer fixing plate, and the speed reducer is fixed inside the box body through the speed reducer fixing plate.

3. The universal milling head of gantry machining center of claim 1, wherein: the main shaft transmission part further comprises a coupler, and the speed reducer is connected with the main shaft through the coupler.

4. The universal milling head of gantry machining center of claim 1, wherein: the universal milling head of the gantry machining center further comprises a C-axis sensor, and the C-axis sensor is mounted outside the box body and connected with the universal milling head joint.

5. The universal milling head of gantry machining center of claim 4, wherein: the external encoder comprises a counter gear, a sensor and a sensor support, the sensor is fixed inside the box body through the sensor support, and the counter gear is connected with the spindle.

6. The universal milling head of gantry machining center of claim 1, wherein: the universal milling head of the gantry machining center further comprises a Z-axis moving part, the Z-axis moving part comprises a Z-axis motor, a Z-axis linear guide rail and a lead screw, the Z-axis motor is installed at the top of the box body, the Z-axis linear guide rail is installed outside the box body and fixedly connected with the box body, and the lead screw is installed inside the box body and connected with the Z-axis motor.

7. The universal milling head of gantry machining center of claim 6, wherein: the Z-axis moving part comprises a ram, a screw nut and a Z-axis linear guide rail slider, the ram is installed on the cross beam and passes through the Z-axis linear guide rail slider and the box body is fixedly connected, and the screw nut is installed inside the box body and fixedly connected with the ram.

8. The universal milling head of gantry machining center of claim 1, wherein: the universal milling head of the gantry machining center further comprises a Z-axis balancing part, the Z-axis balancing part comprises a balancing cylinder and a balancing cylinder fixing part, the balancing cylinder is installed on one side of the box body through the balancing cylinder fixing part, and the balancing cylinder is provided with an oil discharge hole and an oil inlet hole.

9. The universal milling head of gantry machining center of claim 8, wherein: the Z-axis balancing component further comprises a balancing cylinder pull rod support and a balancing cylinder pull rod, the balancing cylinder pull rod support is located at the top of the box body, one end of the balancing cylinder pull rod is connected with the balancing cylinder, and the other end of the balancing cylinder pull rod is fixedly connected with the balancing cylinder pull rod support.

10. A machine tool, characterized by: comprising a gantry machining center gimbaled milling head as claimed in any one of claims 1 to 9.