WO2021098364A1

WO2021098364A1 - Numerically controlled machine tool for spiral bevel gear machining

Info

Publication number: WO2021098364A1
Application number: PCT/CN2020/115923
Authority: WO
Inventors: 尚吉顺; 李锡晗; 张春晖; 蒋凯
Original assignee: 湖南中大创远数控装备有限公司
Priority date: 2019-11-20
Filing date: 2020-09-17
Publication date: 2021-05-27
Also published as: CN110948059A

Abstract

A numerically controlled machine tool for spiral bevel gear machining, comprising a machine tool body (100), a column (200), a cutter spindle box (300), a workpiece spindle box (400), and a rotary table (500). The rotary table is mounted on the machine tool body and can move linearly along the X-axis direction; the workpiece spindle box is mounted on the rotary table and can rotate along with the rotary table around the Y-axis direction; a groove is provided on the machine tool body along the Z-axis direction, and the column has the lower end mounted on the groove and can move linearly along the Z-axis direction; the workpiece spindle box is mounted on the column and can move linearly along the Y-axis direction. By mounting the column in the groove of the machine tool body, the height of gravitational center of the column is reduced, the stability of the entire machine tool is improved, and moreover, the column has better adjustment performance.

Description

Numerical control machine tool for processing spiral bevel teeth

Technical field

The invention relates to the technical field of spiral bevel gear processing equipment, in particular to a numerical control machine tool for spiral bevel gear processing.

Background technique

In the current technology, spiral bevel gear processing equipment includes mechanical spiral bevel gear processing machine tools and CNC spiral bevel gear processing machine tools; the structure and adjustment links of mechanical spiral bevel gear processing machine tools are the most complicated in gear machine tools; with technological progress, The spiral bevel gear processing machine adopts the computer to directly control three linear axes (ie X, Z, Y axis) and three rotation axes (ie A, B, C axis), which can simulate the processing motion of a mechanical spiral bevel gear processing machine tool , So as to process the spiral bevel gear.

In order to ensure the machining of the tool in the Y-direction (Y-axis), the column needs to ensure sufficient height to provide sufficient up and down travel for the tool. The current column generally has a relatively high stroke, but the current column is generally made of a metal entity, and other accessories such as cutters, slide rails, etc. installed on the column result in a high center of gravity of the column, which is likely to cause the entire machine tool to be unstable. . At the same time, during the horizontal movement of the column, due to the high center of gravity, the column needs a large moment to move, which makes adjustment difficult.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a numerical control machine tool for spiral bevel tooth processing, which can solve the problem of unstable and difficult adjustment of the entire machine tool due to the high column height and the high center of gravity of the spiral bevel tooth processing numerical control machine tool.

The technical scheme adopted by the present invention is: a CNC machine tool for spiral bevel gear processing, including a bed, a column, a tool headstock, a workpiece headstock, and a rotary table;

The rotary table is installed on the bed and can move linearly along the X-axis direction, and the workpiece headstock is installed on the rotary table and can rotate along the Y-axis direction with the rotary table;

The bed is provided with a groove along the Z axis direction, the lower end of the column is installed above the groove and can move linearly along the Z axis direction, and the tool headstock is installed on the column and can move along the Y axis. Axis direction makes linear movement.

Further optimization, the bed is respectively provided with a first linear guide rail and a second linear guide rail along the X direction and the Z direction, the rotary table is mounted on the bed body through the first linear guide rail, and the column The second linear guide is installed on the bed, the side of the upright column facing the workpiece headstock is provided with a third linear guide along the Y direction, and the tool headstock is installed on the upright column through the third linear guide.

For further optimization, the third linear guide rails are arranged on both sides of the groove, and a driving mechanism for driving the movement of the column is provided in the groove.

Further optimization, the workpiece spindle box is provided with a workpiece spindle, and the workpiece spindle is arranged along the Z direction and can rotate around itself.

For further optimization, the rotary table includes a rotary shaft and a driving device that drives the rotary shaft to rotate, the rotary shaft is arranged along the Y-axis direction and can rotate around itself, and the rotary shaft and the driving device are connected in transmission through a transmission device.

Further optimization, the transmission device is one of a gear transmission mechanism, a crank connecting rod transmission mechanism, and a worm gear transmission mechanism.

In a further optimization, the column is provided with an installation hole for installing a tool headstock, and the tool spindle of the tool headstock is installed in the installation hole.

For further optimization, the mounting hole is provided in the middle of the upright column, and the mounting hole is penetratingly arranged on the upright column along the Z-direction. For further optimization, reinforcing ribs are provided at the lower part of both sides of the upright column.

For further optimization, a grinding wheel dresser for grinding tools is provided on the workpiece headstock.

The beneficial effects of the present invention:

1. The present invention achieves the purpose of reducing the height of the center of gravity of the column by installing the column in the groove of the machine tool, so that the column can maintain a sufficient height while reducing the height of the center of gravity of the column, improving the stability of the entire machine tool, and making the column Have better adjustment performance;

2. The linear motions of the machine tool in the three directions of X, Z, Y are all completed by the bed or the guide and driving device set on the column, which makes the machine tool compact, easy to assemble, and has good process performance, and the X, Z of the machine tool Directional linear motion is a non-coplanar horizontal motion, while the vertical motion of the Y-axis only has the function of tool and feed. This layout has a relatively short stroke in the vertical direction (Y-axis), which also makes the size of the machine height direction smaller. Small, low center of gravity, and significantly improved rigidity;

3. The overall layout of the machine tool adopts a vertical structure, the whole machine has less parts, small floor space, easy protection, convenient loading and unloading of workpieces and cutters, and the workpieces are easy to be automatically loaded and unloaded by manipulators.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

Fig. 1 is a schematic diagram of the overall structure of an embodiment of a numerically controlled machine tool for processing spiral bevel teeth of the present invention;

Fig. 2 is a schematic view of the front structure of an embodiment of the numerical control machine tool for processing spiral bevel teeth of the present invention.

Detailed ways

As shown in the embodiment shown in FIG. 1 and FIG. 2, the CNC machine tool for spiral bevel gear processing includes a bed 100, a column 200, a tool headstock 300, a workpiece headstock 400, and a rotary table 500;

The rotary table 500 is installed on the bed 100 and can move linearly along the X-axis direction, and the workpiece headstock 400 is installed on the rotary table 500 and can rotate with the rotary table 500 around the Y-axis direction;

The bed 100 is provided with a groove 130 along the Z-axis direction. The lower end of the column 200 is installed above the groove 130 and can move linearly along the Z-axis direction. The tool headstock 300 is installed on the column 200 and can be moved along the Y-axis direction. Straight line movement.

The bed 100 is respectively provided with a first linear guide 110 and a second linear guide 120 along the X and Z directions. The rotary table 500 is installed on the bed 100 through the first linear guide 110, and the column 200 passes through the second linear guide. 120 is mounted on the bed 100, the side of the column 200 facing the workpiece headstock 400 is provided with a third linear guide 220 along the Y direction, and the tool headstock 300 is mounted on the column 200 through the third linear guide 220.

During the processing of the spiral bevel gear, the spiral bevel gear is clamped by the fixture of the workpiece headstock 400. The tool headstock 300 is equipped with a machining tool. The tool headstock 300 moves linearly along the column 200 on the second linear guide 120 toward the spiral umbrella. Move in the direction of the tooth, and start processing the spiral bevel gear.

The rotary table 500 can move in the X direction along the first linear guide 110, and the tool can select a rotating action under the drive of the rotary table 500 to process each processing surface of the spiral bevel gear.

Wherein, the third linear guide rail 220 is provided on both sides of the groove 130, and a driving mechanism for driving the upright column 200 to move is provided in the groove 130.

The column 200 is arranged on the third linear guide rail 220 to realize the movement of the column 200 in the Y direction, drive the column 200 to be related to drive, and is arranged in the groove 130 to optimize the layout structure of the product. The drive in this embodiment is mainly a screw drive, and the corresponding drive mechanism can be selected according to actual needs. The workpiece spindle box 400 is provided with a workpiece spindle 410, and the workpiece spindle 410 is arranged along the Z direction and can rotate around itself. The workpiece spindle 410 of the workpiece spindle box 400 can rotate in the Z-axis direction, and can continuously process the outer circumference of the spiral bevel gear.

The present invention achieves the purpose of reducing the height of the center of gravity of the column 200 by installing the column 200 in the groove 130 of the machine tool 100, so that the column 200 maintains a sufficient height while reducing the height of the center of gravity, improving the stability of the entire machine tool, and making The column 200 has better adjustment performance.

The rotary table 500 includes a rotary shaft and a driving device for driving the rotary shaft to rotate. The rotary shaft is arranged along the Y-axis direction and can rotate around itself, and the rotary shaft and the driving device are connected in transmission through a transmission device.

The rotary table 500 is rotated by a rotary shaft, and one end of the rotary shaft is provided with a rotary table for driving the rotary shaft to rotate, and a driving device is provided in the rotary table; the driving device is selected from a torque motor or a gear transmission mechanism driven by external driving power , One of the crank connecting rod transmission mechanism, worm gear transmission mechanism.

The column 200 is provided with an installation hole 210 for installing the tool headstock 300, and the tool spindle of the tool headstock 300 is installed in the installation hole 210.

Wherein, the mounting hole 210 is provided in the middle of the column 200, and the mounting hole 210 is penetratingly provided on the column 200 along the Z direction.

The tool spindle of the tool spindle box 300 is installed in the mounting hole 210, which further reduces the height of the center of gravity of the column 200 and improves the stability of the entire machine tool.

Reinforcing ribs 600 are provided at the lower part of both sides of the column 200. Due to the provision of the weight-reducing holes 210, the strength of the column 200 is reduced. The strength of the column 200 is increased by adding the reinforcing ribs 600, and the connection strength between the column 200 and the bed 100 is increased at the same time.

The work headstock 400 is provided with a grinding wheel dresser 700 for grinding tools. By setting the grinding wheel dresser 700 in the workpiece headstock 400, the tool on the tool spindle can be ground.

Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art can also make equivalent modifications or substitutions without departing from the spirit of the invention. These equivalent modifications or substitutions are all included in the claims of this application. In the range.

Claims

A numerical control machine tool for spiral bevel gear processing, which is characterized in that it includes a bed (100), a column (200), a tool headstock (300), a workpiece headstock (400), and a rotary table (500);

The rotary table (500) is installed on the bed (100) and can move linearly along the X-axis direction, and the workpiece headstock (400) is installed on the rotary table (500) and can be Follow the rotary table (500) to rotate around the Y-axis direction;

The bed (100) is provided with a groove (130) along the Z-axis direction, and the lower end of the column (200) is installed in the groove (130) and can move linearly along the Z-axis direction. The tool headstock (300) is installed on the column (200) and can move linearly along the Y-axis direction.
The numerical control machine tool for processing spiral bevel teeth according to claim 1, characterized in that: the bed (100) is provided with a first linear guide (110) and a second linear guide along the X direction and the Z direction, respectively (120), the rotary table (500) is installed on the bed (100) through the first linear guide (110), and the column (200) passes through the second linear guide (120) Installed on the bed (100), the side of the column (200) facing the workpiece headstock (400) is provided with a third linear guide rail (220) along the Y direction, and the tool headstock (300) passes through the third linear guide rail (220) is installed on the column (200).
The numerical control machine tool for processing spiral bevel teeth according to claim 2, characterized in that: the third linear guide rail (220) is provided on both sides of the groove (130), and the groove (130) is provided with There is a driving mechanism for driving the upright column (200) to move.
The numerical control machine tool for processing spiral bevel teeth according to claim 3, characterized in that: the workpiece spindle box (400) is provided with a workpiece spindle (410), and the workpiece spindle (410) is arranged along the Z direction and Can rotate around itself.
The numerical control machine tool for processing spiral bevel teeth according to any one of claims 1 to 4, wherein the rotary table (500) comprises a rotary shaft and a driving device for driving the rotary shaft to rotate, and the rotary shaft It is arranged along the Y-axis direction and can rotate around itself, and the rotary shaft and the driving device are connected in transmission through a transmission device.
The numerical control machine tool for processing spiral bevel teeth according to claim 5, wherein the transmission device is one of a gear transmission mechanism, a crank connecting rod transmission mechanism, and a worm gear transmission mechanism.
The numerical control machine tool for machining spiral bevel teeth according to any one of claims 1 to 4, characterized in that: the column (200) is provided with a mounting hole (210) for mounting a tool headstock (300), The tool spindle of the tool spindle box (300) is installed in the mounting hole (210).
The numerical control machine tool for processing spiral bevel teeth according to claim 7, characterized in that: the mounting hole (210) is provided in the middle of the column (200), and the mounting hole (210) is penetrating in the Z direction. On the upright (200).
The numerical control machine tool for processing spiral bevel teeth according to claim 8, characterized in that: the lower part of both sides of the column (200) is provided with reinforcing ribs (600).
The numerical control machine tool for machining spiral bevel teeth according to any one of claims 1 to 4, characterized in that: the workpiece headstock (400) is provided with a grinding wheel dresser (700) for grinding tools.