CN202910576U - Precise gear transmission type A/C shaft double pivot angle numerical control milling head - Google Patents

Abstract

The utility model discloses a precision gear transmission type A/C axis double pendulum angle numerical control milling head, the main shaft seat of which is connected to the lower end of the vertical transmission shaft, the upper part of the vertical transmission shaft is placed in the ram of the machine tool, and the electric main shaft passes through the horizontal rotation shaft Installed on the spindle seat, the vertical transmission shaft is connected to the C-axis servo motor in the machine tool ram through the C-axis transmission mechanism, and the horizontal rotation axis is connected to the A-axis servo motor in the machine tool ram through the A-axis transmission mechanism. The A-axis transmission mechanism includes the machine tool slide The driving and driven A-axis gears in the pillow and the driving and driven A-axis bevel gears in the main shaft seat, the driven A-axis gear and the driving A-axis bevel gear are coaxial and pass through the center of the shaft hole center of the vertical transmission shaft shaft connection. In the utility model, the transmission mechanism for rotating the electric spindle around the C axis is set in the ram, and the transmission mechanism for swinging around the A axis is respectively set in the main shaft seat and the ram, which simplifies the internal structure of the milling head, reduces the volume, and makes the movement more flexible. , Improve the machining accuracy of the machine tool and expand the processing range.

Description

Precision gear transmission type A/C axis double swing angle CNC milling head

(1) Technical field:

The utility model relates to a machine tool milling power head, in particular to a precision gear transmission type A/C axis double-swing angle numerical control milling head.

(2) Background technology:

As the key equipment for complex curved surface processing, five-axis linkage CNC machine tools are increasingly in demand in various fields such as aerospace, automobiles, and molds. As the core component of the five-axis linkage CNC machine tool, the A/C-axis double-swing angle milling head has always been the focus of research by various machine tool manufacturers at home and abroad. The A/C-axis double-swing angle milling head technology of foreign professional manufacturers has been very mature, while the domestic A/C-axis double-swing angle milling head mainly relies on imports. It is important to develop a practical and economical A/C-axis double-swing angle milling head. significance.

At present, the gear-driven A/C-axis double-swing angle milling head produced in China has the disadvantages of unreasonable design of transmission mode, low machining accuracy, large and inflexible milling head, which seriously affects the processing range and processing quality of the machine tool.

(3) Contents of the utility model:

In order to overcome the deficiencies of the traditional design, the purpose of this utility model is to propose a precision gear-driven A/C axis double-swing angle CNC milling head with small size, flexible rotation and high precision.

The precision gear transmission type A/C axis double-swing angle CNC milling head capable of achieving the above-mentioned purpose includes an electric spindle and a spindle seat, the difference is that the spindle seat is connected to the lower end of the vertical transmission shaft, and the upper section of the vertical transmission shaft is placed In the ram of the machine tool, the electric spindle is installed on the spindle seat through the left and right horizontal rotation shafts, the vertical transmission shaft is connected to the C-axis servo motor in the machine tool ram through the C-axis transmission mechanism, and the horizontal rotation shaft passes through the A The shaft transmission mechanism is connected to the A-axis servo motor in the ram of the machine tool.

The C-axis transmission mechanism includes at least a pair of meshing active C-axis gears, driven C-axis gears and a C-axis reducer, the driven C-axis gear is coaxially connected with the vertical transmission shaft, and the active C-axis gear passes through the C-axis reducer Connect the C-axis servo motor; the A-axis transmission mechanism includes at least one pair of meshing active A-axis gears, driven A-axis gears and A-axis reducers arranged in the machine tool ram and at least one pair of A-axis reducers arranged in the main shaft seat The meshing active A-axis bevel gear and driven A-axis bevel gear, the active A-axis gear is connected to the A-axis servo motor through the A-axis reducer, the driven A-axis bevel gear is coaxially connected with the left or right horizontal rotation shaft, and the driven The A-shaft gear is coaxial with the driving A-shaft bevel gear and is connected through an intermediate shaft at the center of the shaft hole of the vertical transmission shaft.

It can be seen from the above structure that in the utility model, the rotation of the main shaft seat, that is, the electric main shaft, around the C-axis (axis perpendicular to the horizontal plane) is through the C-axis servo motor—the C-axis reducer—the active C-axis Gear - driven C-axis gear - transmission chain of vertical transmission shaft; the electric spindle swings up and down around the A-axis (axis perpendicular to the vertical plane) through the A-axis servo motor - A-axis reducer - Driving A-shaft gear-driven A-shaft gear-intermediate shaft-driving A-shaft bevel gear-driven A-shaft bevel gear-left or right horizontal rotation axis transmission chain is realized.

The combined movement of the rotation of the electric spindle around the axis of the C axis and the up and down swing around the axis of the A axis can realize the processing of any spatial position up and down, front and back, left and right, and become a universal milling head.

In the case that the transmission ratio of the C-axis reducer remains unchanged, in order to convert the high speed of the C-axis servo motor into a large torque for the electric spindle to rotate around the axis of the C-axis, the transmission ratio between the main and driven C-axis gears is set is less than 1.

Similarly, when the transmission ratio of the A-axis reducer remains unchanged, in order to convert the high rotational speed of the A-axis servo motor into a large torque for the electric spindle to swing around the axis of the A-axis, the drive and driven A-axis gears The transmission ratio is set to be less than 1.

In order to realize precision transmission, the main and driven C-axis gears, the main and driven A-axis gears, and the main and driven A-axis bevel gears all adopt precision gap-adjusting gear pairs.

In a conventional design, the transmission ratio between the driving and driven A-axis bevel gears is set to 1.

Advantage of the utility model:

1. In the precision gear transmission type A/C axis double swing angle CNC milling head of the present invention, the transmission mechanism for the electric spindle to rotate around the C axis is set in the machine tool ram, and the transmission mechanism for swinging around the A axis is respectively set in the spindle seat and In the ram of the machine tool, the internal structure of the milling head is simplified, the volume of the milling head is reduced, the overall structure of the milling head is more reasonable, and the movement is more flexible.

2. The gear transmission mechanism in the utility model all adopts precision gap-adjusting gear pairs, thereby realizing precise machining of workpieces.

(4) Description of the drawings:

Fig. 1 is a schematic structural diagram of the working principle of an embodiment of the present invention.

Drawing number identification: 1. Electric spindle; 2. Spindle seat; 3. Vertical transmission shaft; 4. Machine tool ram; 5. Horizontal rotation shaft; 6. C-axis servo motor; 7. A-axis servo motor; 8. Active C Shaft gear; 9. Driven C-axis gear; 10. C-axis reducer; 11. Driving A-axis gear; 12. Driven A-axis gear; 13. Driving A-axis bevel gear; 14. Driven A-axis bevel gear; 15. A-axis reducer; 16. Intermediate shaft; 17. C-axis coupling; 18. A-axis coupling.

(5) Specific implementation methods:

Below in conjunction with accompanying drawing, technical scheme of the present utility model is further described:

The utility model precision gear transmission type A/C axis double pendulum angle numerical control milling head is mainly composed of an electric spindle 1 and a spindle seat 2, the electric spindle 1 is placed in the concave cavity of the spindle seat 2 whose bottom is concave inward, and the electric spindle 1 The shaft body of the main shaft 1 is connected to the bearing and the main shaft seat 2 through the left and right horizontal rotation shafts 5, and the main shaft seat 2 is connected to the bottom of the vertical transmission shaft 3, and the shaft body of the vertical transmission shaft 3 is installed on the machine tool ram through the bearing 4, the machining range of the electric spindle 1 is determined by the synthesis of the rotation of the spindle base 2 around the C-axis axis and the swing of the electric spindle 1 around the A-axis axis, as shown in FIG. 1 .

The rotation of the spindle base 2 around the C-axis axis is realized by the C-axis transmission mechanism arranged in the machine tool ram 4 acting on the vertical transmission shaft 3 . The C-axis transmission mechanism is composed of a driving C-axis gear 8, a driven C-axis gear 9 and a C-axis reducer 10, the driven C-axis gear 9 is coaxially fixedly connected with the vertical transmission shaft 3, and the driving C-axis gear 8 is located on One side of the vertical transmission shaft 3 is meshed with the driven C-axis gear 9, and the active C-axis gear 8 is upwardly connected to the output shaft of the C-axis reducer 10. C-axis servo motor 6, the input shaft of C-axis reducer 10 is connected to the output shaft of C-axis servo motor 6 through C-axis coupling 17; wherein the active C-axis gear 8 is a helical pinion, and the driven C-axis gear 9 is Helical gear, so that the transmission ratio between the driving C-axis gear 8 and the driven C-axis gear 9 is less than 1, so as to realize the high torque output of the main shaft seat 2; the driving C-axis gear 8 and the driven C-axis gear 9 are made as Precision gap adjustment gear pair to achieve precision transmission, as shown in Figure 1.

The rotation of the electric spindle 1 around the axis of the A-axis is realized by the A-axis transmission mechanisms respectively arranged in the machine tool ram 4 and the main shaft seat 2 acting on the horizontal transmission shaft 5 . The A-axis rotating mechanism arranged on the machine tool ram 4 is composed of the driving A-axis gear 11, the driven A-axis gear 12 and the A-axis reducer 15. The driven A-axis gear 12 is coaxially arranged above the vertical transmission shaft 3, and the driving A-axis Shaft gear 11 is arranged on the other side of vertical transmission shaft 3 and meshes with driven A-shaft gear 12, and driving A-shaft gear 11 connects the output shaft of A-shaft speed reducer 15 upwards, and the power of described A-shaft transmission mechanism is set at A The A-axis servo motor 7 above the shaft reducer 15, the input shaft of the A-axis reducer 15 is connected to the output shaft of the A-axis servo motor 7 through the A-axis coupling 18; the A-axis transmission mechanism located in the main shaft seat 2 is a For the active A-axis bevel gear 13 and the driven A-axis bevel gear 14 that mesh with each other, the active A-axis bevel gear 13 is located in the seat shell on the top of the main shaft seat 2 cavity and is coaxial with the driven A-axis gear 12. The A-axis bevel gear 14 is arranged in the seat shell of the side of the main shaft seat 2 cavity and is coaxially connected with the left or right horizontal rotating shaft 5, and the central axis hole of the vertical transmission shaft 3 is coaxially arranged with an intermediate shaft 16, and the intermediate shaft 16 The upper end protrudes from the vertical transmission shaft 3 to connect the driven A-axis gear 12, and the lower end of the intermediate shaft 16 protrudes from the vertical transmission shaft 3 and extends into the top of the main shaft seat 2 cavity to connect the active A-axis bevel gear 13; wherein the active A-axis bevel gear 13 and The transmission ratio between the driven A-axis bevel gears 14 is 1, the driving A-axis gear 11 is a helical pinion, and the driven A-axis gear 12 is a helical gear, so that the driving A-axis gear 11 and the driven A-axis gear 12 The transmission ratio between them is less than 1, so as to realize the large torque output of the electric spindle 1; the driving A-axis gear 11 and the driven A-axis gear 12, the driving A-axis bevel gear 13 and the driven A-axis bevel gear 14 are also made as precision adjustment Gap gear pair to achieve precision transmission, as shown in Figure 1.

Claims (5)

1. Precision gear transmission type A/C axis double-swing angle CNC milling head, including electric spindle (1) and spindle seat (2), characterized in that: the spindle seat (2) is connected to the lower end of the vertical transmission shaft (3) , the upper part of the vertical transmission shaft (3) is placed in the ram (4) of the machine tool, the electric spindle (1) is installed on the main shaft seat (2) through the left and right horizontal rotation shafts (5), the vertical transmission The shaft (3) is connected to the C-axis servo motor (6) in the machine tool ram (4) through the C-axis transmission mechanism, and the horizontal rotation axis (5) is connected to the A-axis in the machine tool ram (4) through the A-axis transmission mechanism Servo motor (7); the C-axis transmission mechanism includes at least a pair of meshing main and driven C-axis gears (8, 9) and a C-axis reducer (10), the driven C-axis gear (9) and the vertical transmission The shaft (3) is coaxially connected, and the active C-axis gear is connected to the C-axis servo motor (6) through the C-axis reducer (10); the A-axis transmission mechanism includes at least one pair of meshing gears arranged in the machine tool ram (4) The driving and driven A-axis gears (11, 12) and the A-axis reducer (15) and at least one pair of meshing driving and driven A-axis bevel gears (13, 14) arranged in the main shaft seat (2), The active A-axis gear (11) is connected to the A-axis servo motor (7) through the A-axis reducer (15), and the driven A-axis bevel gear (14) is coaxially connected with the left or right horizontal rotation shaft (5). The A-shaft gear (12) is coaxial with the driving A-shaft bevel gear (13) and is connected through an intermediate shaft (16) at the center of the shaft hole of the vertical transmission shaft (3). the 2. The precision gear-driven A/C-axis double-swing angle CNC milling head according to claim 1, characterized in that: the transmission ratio between the driving and driven C-axis gears (8, 9) is less than 1. the 3. The precision gear-driven A/C-axis double-swing angle CNC milling head according to claim 1, characterized in that: the transmission ratio between the driving and driven A-axis gears (11, 12) is less than 1. the 4. According to any one of claims 1-3, the precision gear-driven A/C-axis double-swing angle CNC milling head is characterized in that: the main and driven C-axis gears (8, 9), the main and The driven A-shaft gears (11, 12) and the driving and driven A-shaft bevel gears (13, 14) are precision gap-adjusting gear pairs. the 5. According to any one of claims 1 to 3, the precision gear-driven A/C-axis double-swing angle CNC milling head is characterized in that: between the driving and driven A-axis bevel gears (13, 14) The transmission ratio is equal to 1. the

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