Gantry milling machine automatic head library and machine tools

Abstract

The present invention discloses an automatic headstock for a gantry milling machine, belonging to the field of machine tools. The first pendulum frame is used to install a protective cover assembly, and the first pendulum frame is rotatably mounted on a column; the second pendulum frame is used to install a right-angle head assembly, and the second pendulum frame is rotatably mounted on a column. When the automatic headstock of the gantry milling machine is in an operating state, a first drive structure drives the first pendulum frame to be located in front of the column, and a second drive structure drives the second pendulum frame to be located in front of the column. When the automatic headstock of the gantry milling machine is in an off-operating state, the first drive structure drives the first pendulum frame to be located to the side of the column, and the second drive structure drives the second pendulum frame to be located to the side of the column. Through the above design, the first and second pendulum frames are driven and controlled separately, and when the automatic headstock of the gantry milling machine is in an off-operating state, the first and second pendulum frames are located to the side of the column, which does not affect the center of gravity of the crossbeam, saddle, and spindle, and does not affect the precision of the machine tool. The present invention also relates to a machine tool including the above automatic headstock for a gantry milling machine.

Description

Technical Field

[0001] The present invention relates to the field of machine tools, in particular to an automatic head library for a gantry milling machine and a machine tool comprising the automatic head library for the gantry milling machine. Background Art

[0002] An automatic head magazine is an accessory for gantry milling machines and is particularly useful when equipped with a fully automatic right-angle head. As is well known, a pentahedron gantry machining center allows for a single workpiece clamping and, through programming, can simultaneously complete milling, drilling, reaming, and boring operations on four surfaces, achieving high precision and efficiency. A typical pentahedron gantry machining center is a gantry milling machine equipped with three major accessories: a fully automatic right-angle head, a vertical or horizontal tool magazine, and an automatic head magazine.

[0003] With the development of gantry technology, both fully automatic right-angle heads and vertical and horizontal tool magazines have matured. As an integral component, the importance of the automatic tool magazine is self-evident. Its reliability, flexibility, and travel capacity are all crucial.

[0004] There are currently two types of automatic head magazine structures on the market for fully automatic right-angle heads. One is a linear movable type, and the other is a rotary type. The linear movable type has a simple structure, the head magazine is located in front of the right column, and it occupies a relatively large area and is expensive. The second type, the rotary head magazine, has a simple structure, occupies a small area, and is inexpensive. The head magazine is also located in front of the column. The combined weight of the head magazine and the fully automatic right-angle head is nearly 350 kg. Hanging it in front of the right column shifts the center of gravity of the crossbeam, saddle, and spindle forward, which is detrimental to the machine's precision and stability. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide an automatic head magazine for a gantry milling machine that does not affect the center of gravity of the crossbeam, saddle and spindle.

[0006] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a machine tool that does not affect the center of gravity of the beam, the saddle and the main shaft.

[0007] One of the purposes of the present invention is achieved by the following technical solution:

[0008] An automatic head library for a gantry milling machine, comprising a column and

[0009] a first swing frame, used for mounting a protective cover assembly, wherein the first swing frame is rotatably mounted on the column;

[0010] A second swing frame is used to install the right-angle head assembly, and the second swing frame is rotatably installed on the column;

[0011] a first driving structure, the first driving structure being transmission-connected to the first swing frame and capable of driving the first swing frame to rotate relative to the column;

[0012] a second driving structure, the second driving structure being transmission-connected to the second swing frame and capable of driving the second swing frame to rotate relative to the column;

[0013] When the automatic head storage of the gantry milling machine is in a working state, the first driving structure drives the first swing frame to be located in front of the column, and the second driving structure drives the second swing frame to be located in front of the column; when the automatic head storage of the gantry milling machine is in a non-working state, the first driving structure drives the first swing frame to be located on the side of the column, and the second driving structure drives the second swing frame to be located on the side of the column.

[0014] Furthermore, the gantry milling machine automatic head library also includes a fixed bracket, which is fixed to the column, the first swing frame and the second swing frame are rotatably installed on the fixed bracket, and the first drive structure and the second drive structure are installed on the fixed bracket.

[0015] Furthermore, the cross section of the fixing bracket is L-shaped.

[0016] Furthermore, the first driving structure includes a first hydraulic motor and a first transmission shaft. The first hydraulic motor is fixedly mounted on the fixed bracket. The output shaft of the first hydraulic motor is in transmission connection with the first transmission shaft. The first transmission shaft is in transmission connection with the first swing frame.

[0017] Furthermore, the first driving structure further includes a first mounting structure, the first mounting structure includes a first pressure cover, the first hydraulic motor is fixed to the first pressure cover, and the first pressure cover is fixed to the fixed bracket.

[0018] Furthermore, the first mounting structure further includes a first gasket, which is installed between the first pressure cover and the fixing bracket.

[0019] Furthermore, the first driving structure also includes a first bearing, which is installed between the first transmission shaft and the fixed bracket.

[0020] Furthermore, the first driving structure further includes a first spacer sleeve, and the first spacer sleeve is located between the first bearing and the first swing frame.

[0021] Furthermore, the first driving structure and the second driving structure are coaxially arranged.

[0022] The second object of the present invention is achieved by adopting the following technical solution:

[0023] A machine tool comprises any one of the above-mentioned gantry milling machine automatic head magazines.

[0024] Compared with the prior art, the first swing frame of the automatic head warehouse of the gantry milling machine of the present invention is used to install the protective cover assembly, and the first swing frame is rotatably installed on the column; the second swing frame is used to install the right-angle head assembly, and the second swing frame is rotatably installed on the column; the first drive structure is transmission-connected to the first swing frame and can drive the first swing frame to rotate relative to the column; the second drive structure is transmission-connected to the second swing frame and can drive the second swing frame to rotate relative to the column; when the automatic head warehouse of the gantry milling machine is in a working state, the first drive structure drives the first swing frame to be located in front of the column, and the second drive structure drives the second swing frame to be located in front of the column; when the automatic head warehouse of the gantry milling machine is in a non-working state, the first drive structure drives the first swing frame to be located on the side of the column, and the second drive structure drives the second swing frame to be located on the side of the column; through the above design, the first swing frame and the second swing frame are driven and controlled separately, and when the automatic head warehouse of the gantry milling machine is in a non-working state, the first swing frame and the second swing frame are located on the side of the column, which does not affect the center of gravity of the crossbeam, saddle and spindle, and does not affect the precision of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional diagram of the automatic head magazine of the gantry milling machine of the present invention when it is in a non-working state;

[0026] Figure 2 for Figure 1 Cross-sectional view of the automatic head magazine of the gantry milling machine;

[0027] Figure 3 for Figure 2 A schematic diagram of a partial structure of the automatic head library of the gantry milling machine;

[0028] Figure 4 for Figure 2 Another partial structural diagram of the automatic head library of the gantry milling machine;

[0029] Figure 5 for Figure 1 A three-dimensional view of the gantry milling machine's automatic head magazine in working condition.

[0030] In the figure: 10, column; 20, fixed bracket; 30, first swing frame; 40, first drive structure; 41, first hydraulic motor; 42, first transmission shaft; 43, first transmission key; 44, first mounting structure; 440, first pressure cover; 441, first gasket; 45, first spacer; 46, first bearing; 50, second swing frame; 60, second drive structure; 61, second hydraulic motor; 62, second transmission shaft; 63, second transmission key; 64, second mounting structure; 640, second pressure cover; 641, second gasket; 65, second spacer; 66, second bearing; 70, protective cover assembly; 80, right-angle head assembly. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Figures 1 to 5 The automatic head warehouse of the gantry milling machine of the present invention includes a column 10, a fixed bracket 20, a first swing frame 30, a first drive structure 40, a second swing frame 50, a second drive structure 60, a protective cover assembly 70, and a right-angle head assembly 80.

[0035] The column 10 is a hollow rectangular parallelepiped structure.

[0036] The fixing bracket 20 includes two sides, which are fixedly connected. The angle between the two sides is 90 degrees. The cross section of the fixing bracket 20 is L-shaped. The two sides of the fixing bracket 20 are respectively fixed to two adjacent surfaces of the column 10.

[0037] The first swing frame 30 is rotatably mounted on the fixed bracket 20. The first swing frame 30 is used to mount the protective cover assembly 70. The first swing frame 30 can rotate between the front and side of the fixed bracket 20.

[0038] The first drive structure 40 includes a first hydraulic motor 41, a first transmission shaft 42, a first transmission key 43, a first mounting structure 44, a first spacer 45, and a first bearing 46. The first mounting structure 44 includes a first gland 440 and a first gasket 441. The first hydraulic motor 41 is fixedly connected to the first gland 440 via fasteners. The fasteners can be any of screws, bolts, or screws. The first gland 440 is secured to the fixed bracket 20 via fasteners. The first gasket 441 is mounted between the first gland 440 and the fixed bracket 20. By adjusting the thickness of the first gasket 441, the preload of the two first bearings 46 can be adjusted to match the torque required by the first hydraulic motor 41. The output end of the first hydraulic motor 41 is connected to the first transmission shaft 42, driving the first transmission shaft 42 to rotate. The first transmission key 43 is mounted between the first transmission shaft 42 and the first swing bracket 30, enabling the first transmission shaft 42 to drive the first swing bracket 30 to rotate. The first bearing 46 is mounted between the first transmission shaft 42 and the fixed bracket 20. There are two first bearings 46 , which are respectively sleeved on both ends of the first transmission shaft 42 . The first spacer 45 is installed between the first bearings 46 and the first swing frame 30 .

[0039] The second swing frame 50 is rotatably mounted on the fixed bracket 20. The second swing frame 50 is used to mount the right-angle head assembly 80. The second swing frame 50 can rotate between the front and side of the fixed bracket 20.

[0040] The second drive structure 60 includes a second hydraulic motor 61, a second transmission shaft 62, a second transmission key 63, a second mounting structure 64, a second spacer 65, and a second bearing 66. The second mounting structure 64 includes a second gland 640 and a second gasket 641. The second hydraulic motor 61 is secured to the second gland 640 via fasteners, such as screws, bolts, or screws. The second gland 640 is secured to the fixed bracket 20 via fasteners. The second gasket 641 is mounted between the second gland 640 and the fixed bracket 20. By adjusting the thickness of the second gasket 641, the preload of the two second bearings 66 can be adjusted to match the torque required by the second hydraulic motor 61. The output end of the second hydraulic motor 61 is connected to the second transmission shaft 62, driving the second transmission shaft 62 to rotate. The second transmission key 63 is mounted on the second transmission shaft 62 and the second swing bracket 50, enabling the second transmission shaft 62 to drive the second swing bracket 50 to rotate. The second bearing 66 is mounted between the second transmission shaft 62 and the fixed bracket 20. There are two second bearings 66 , which are respectively mounted on both ends of the second transmission shaft 62 . The second spacer 65 is mounted between the second bearings 66 and the second swing frame 50 .

[0041] The protective cover assembly 70 is mounted on the first swing frame 30 .

[0042] The right-angle head assembly 80 is mounted on the second swing frame 50 .

[0043] When assembling the automatic headstock of a gantry milling machine, the two sides of the fixed bracket 20 are fixed to two adjacent surfaces of the column 10. The first swing bracket 30 is rotatably mounted on the fixed bracket 20. The second swing bracket 50 is rotatably mounted on the fixed bracket 20. The first swing bracket 30 and the second swing bracket 50 are arranged parallel to each other. The first drive structure 40 and the second drive structure 60 are mounted on the fixed bracket 20, and the first drive structure 40 and the second drive structure 60 are arranged coaxially.

[0044] When the automatic head warehouse of the gantry milling machine is in use, the first drive structure 40 drives the first pendulum frame 30 to rotate to the front end of the column 10, and the second drive structure 60 drives the second pendulum frame 50 to rotate to the front end of the column 10. When the automatic head warehouse of the gantry milling machine is not in use, the first drive structure 40 drives the first pendulum frame 30 to rotate to the side of the column 10, and the second drive structure 60 drives the second pendulum frame 50 to rotate to the side of the column 10, which does not affect the center of gravity of the crossbeam, saddle and main shaft, and does not affect the precision of the machine tool. The first hydraulic motor 41 and the second hydraulic motor 61 adjust the flow entering the hydraulic motor through the throttle valve, thereby adjusting the indexing speed, which is stable and reliable. The overall structure of the automatic head warehouse of the gantry milling machine is simple and compact, and occupies a small space. Through electrical settings and separate control, the first pendulum frame 30 and the second pendulum frame 50 can be in different positions.

[0045] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patented invention. It should be noted that those skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention. These variations and improvements are equivalent modifications and improvements to the above embodiments based on the essential technology of the present invention and fall within the scope of protection of the present invention.

Claims

1. An automatic head magazine for a gantry milling machine, comprising a column, characterized in that: The gantry milling machine automatic head library also includes a first swing frame, used for mounting a protective cover assembly, wherein the first swing frame is rotatably mounted on the column; A second swing frame is used to install the right-angle head assembly, and the second swing frame is rotatably installed on the column; a first driving structure, the first driving structure being transmission-connected to the first swing frame and capable of driving the first swing frame to rotate relative to the column; a second driving structure, the second driving structure being transmission-connected to the second swing frame and capable of driving the second swing frame to rotate relative to the column; A fixed bracket, wherein the fixed bracket is fixed to the column, the first swing frame and the second swing frame are rotatably mounted on the fixed bracket, the first drive structure and the second drive structure are mounted on the fixed bracket, the first drive structure comprises a first hydraulic motor and a first transmission shaft, the first hydraulic motor is fixedly mounted on the fixed bracket, the output shaft of the first hydraulic motor is transmission-connected to the first transmission shaft, and the first transmission shaft is transmission-connected to the first swing frame; the second drive structure comprises a second hydraulic motor and a second transmission shaft, the second hydraulic motor is fixedly mounted on the fixed bracket, the output shaft of the second hydraulic motor is transmission-connected to the second transmission shaft, and the second transmission shaft is transmission-connected to the second swing frame; the first drive structure and the second drive structure are coaxially arranged; When the automatic head storage of the gantry milling machine is in a working state, the first driving structure drives the first swing frame to be located in front of the column, and the second driving structure drives the second swing frame to be located in front of the column; when the automatic head storage of the gantry milling machine is in a non-working state, the first driving structure drives the first swing frame to be located on the side of the column, and the second driving structure drives the second swing frame to be located on the side of the column.

2. The automatic head magazine for a gantry milling machine according to claim 1, characterized in that: The cross section of the fixing bracket is L-shaped.

3. The automatic head magazine for a gantry milling machine according to claim 1, characterized in that: The first driving structure further includes a first mounting structure, the first mounting structure includes a first pressure cover, the first hydraulic motor is fixed to the first pressure cover, and the first pressure cover is fixed to the fixed bracket.

4. The automatic head magazine for a gantry milling machine according to claim 3, characterized in that: The first mounting structure further includes a first gasket installed between the first pressure cover and the fixing bracket.

5. The automatic head magazine for a gantry milling machine according to claim 1, characterized in that: The first driving structure further includes a first bearing, which is installed between the first transmission shaft and the fixing bracket.

6. The automatic head magazine for a gantry milling machine according to claim 5, characterized in that: The first driving structure further includes a first spacer sleeve, which is located between the first bearing and the first swing frame.

7. A machine tool, characterized in that: It comprises the automatic head library of a gantry milling machine as described in any one of claims 1-6.

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