Tool changing mechanism of gantry machining center

Abstract

The utility model provides a tool changing mechanism of a gantry machining center, which belongs to the technical field of tool changing of machining centers and comprises a mounting frame, a top plate is fixedly mounted on the side wall of the mounting frame through symmetrical supports, an adjusting mechanism for driving a moving seat is arranged on the side wall of the top plate, and a base is fixedly mounted on the side wall of the mounting frame through a first air cylinder. The base is rotationally connected to the outer portion of the movable base, during tool changing operation, the movable end of the first air cylinder drives the base to move, so that the base drives the tool rest to move to the corresponding taking mechanism through the movable base, a tool is fixed through the taking mechanism and moved to the tool changing position along with the movable base through the adjusting mechanism, and then operation is conducted. And through accurate moving and taking in all directions, the tool can be accurately adjusted according to the taking position, so that the tool changing accuracy is guaranteed, and convenience is brought to the operation process of related personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of tool changing in a machining center, and in particular relates to a tool changing mechanism for a gantry machining center. Background Art

[0002] The machining center is developed from the CNC milling machine. The biggest difference between the machining center and the CNC milling machine is that the machining center has the ability to automatically exchange machining tools. By installing tools of different purposes on the tool magazine, the machining tools on the spindle can be changed through the automatic tool changer in one clamping, realizing multiple machining functions. During the machining process, different tools can be exchanged for workpieces according to needs;

[0003] A composite tool changing device for a horizontal gantry machining center with application number: 202021276606.5, the disclosed technical solution: a PLC controller controls the operation of the first motor to drive the gear to rotate, because the gear is meshed with the gear plate, the gear plate is rotatably connected to the outer wall of the mounting cylinder through the bearing, thereby driving the gear plate to rotate, the lower end of the gear plate is fixedly connected to the rotating plate through a connecting rod, which supports the internal structure and prevents the internal structure from falling, and at the same time, the gear plate drives the rotating plate to rotate, because the arc-shaped slide grooves evenly arranged on the rotating plate are slidably connected to the sliding shaft at the lower end of the corresponding arc-shaped slide plate, The slider at the upper end of the arc-shaped slide is slidably connected with the slide groove corresponding to the lower end of the mounting tube, so the rotation of the rotating piece drives the arc-shaped slide to slide backward along the slide groove corresponding to the lower end of the mounting tube, thereby enlarging the circular hole in the middle of the arc-shaped slide, and the PLC controller controls the ram to move to the tool changing position and the ram moves down, and the PLC controller controls the first motor to work in the reverse direction, and the rotation of the rotating piece drives the arc-shaped slide to slide forward along the slide groove corresponding to the lower end of the mounting tube, thereby realizing automatic clamping of the tool, and a pulley is installed at the front end opening of the arc-shaped slide, and the pulley cooperates with the slideway on the tool to ensure that the tool speed is not affected during processing;

[0004] In the above technical solution, during the tool adjustment process, due to the different installation positions of the tools, it is necessary to accurately adjust the installation position of the replaced tools to ensure the accuracy of the installation. For this purpose, we propose a new tool changing mechanism for the gantry machining center.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology. In order to solve the problem of tool changing in the machining center in the prior art, the utility model provides a tool changing mechanism for a gantry machining center, which adopts a tool changing and picking mechanism combined with a tool holder position adjustment mechanism to achieve an effect of easy operation. The specific technical solution is as follows:

[0007] A tool changing mechanism of a gantry machining center comprises a mounting frame, a top plate is fixedly mounted on the side wall of the mounting frame via a symmetrical bracket, an adjustment mechanism for driving a movable seat is provided on the side wall of the top plate, a picking mechanism is provided on the side wall of the movable seat, a base is fixedly mounted on the side wall of the mounting frame via a first cylinder, the base is rotatably connected to the outside of a movable seat, and a tool holder is fixedly mounted on the side wall of the movable seat.

[0008] In addition, the tool changing mechanism of a gantry machining center in the above technical solution provided by the utility model may also have the following additional technical features:

[0009] In the above technical solution, a slide groove is circumferentially opened on the outer wall of the movable seat, and a plurality of movable grooves are evenly opened on the inner wall of the movable cavity of the base, and balls are evenly embedded in the movable grooves and the movable cavities of the slide grooves.

[0010] The outer wall of the movable seat is evenly provided with a plurality of teeth in the circumferential direction, the side wall of the base is fixedly mounted with a first motor, the outer part of the output shaft of the first motor is sleeved with a gear, and the gear is meshed with the teeth.

[0011] The side wall of the mounting frame is symmetrically fixed with an outer rod, the side wall of the base is symmetrically fixed with one end of a stabilizing rod, and the other end of the stabilizing rod penetrates the side wall of the outer rod and extends to the inner cavity.

[0012] The adjustment mechanism includes a screw, both ends of which are rotatably connected to the side walls of the top plate through symmetrical mounting plates, the movable seat is threadedly connected to the outer side wall of the screw, a second motor is fixedly mounted on the side wall of the top plate, and an output shaft of the second motor is fixedly connected to one end of the screw.

[0013] A slide bar is fixedly installed between the two mounting plates, and the movable seat is slidably connected to the outside of the slide bar.

[0014] The picking mechanism includes two positioning seats, and the two positioning seats are symmetrically connected to the side walls of the support plate through connecting seats. The support plate is fixedly installed on the side wall of the movable seat. The side wall of the support plate is symmetrically connected to the cylinder end of the second cylinder through a first connecting frame. The movable end of the second cylinder is rotatably connected to the second connecting frame, and the second connecting frame is fixedly installed on the side wall of the positioning seat.

[0015] Compared with the prior art, the tool changing mechanism of the gantry machining center of the utility model has the following beneficial effects:

[0016] 1. The movable end of the first cylinder drives the base to move, so that the base drives the tool holder to move to the corresponding picking mechanism through the movable seat, fixes the tool through the picking mechanism and moves the tool to the tool changing position along with the movable seat through the adjustment mechanism, and then operates. The tool can be accurately adjusted according to the picking position through accurate movement in all directions, thereby ensuring the accuracy of tool change, and bringing convenience to the operation process of relevant personnel.

[0017] Second, when the movable seat is rotated to adjust the corresponding tool according to the tool holder, the movable seat drives the sliding groove on the outer surface to slide on the outer surfaces of multiple balls, and at the same time, each ball slides on the inner wall of each movable groove. The stability of the movable seat rotation process is ensured by the multiple circumferential balls, thereby ensuring the stability of the tool switching adjustment process, and further ensuring the accuracy of the tool adjustment and replacement position.

[0018] 3. When the tool position is changed by adjusting the tool holder, the output shaft of the first motor drives the gear to rotate, so that the teeth meshing with the gear drive the movable seat to rotate, and the movable seat drives the tool holder to rotate, making the operation process more convenient.

[0019] Fourth, when the vertical position of the tool holder is adjusted by the first cylinder, the base simultaneously drives two parallel stabilizing rods to slide in the inner cavities of each outer rod. The two stabilizing rods ensure the stability of the base's moving direction and avoid position deviation, thereby ensuring the accuracy of the tool holder position adjustment.

[0020] 5. When adjusting the position of the picking mechanism, the output shaft of the second motor drives the lead screw to rotate between the two mounting plates, so that the moving seat threadedly connected to the outer surface of the lead screw drives the picking mechanism to move, and moves the picking mechanism to the corresponding tool position, making the operation process more convenient and improving the efficiency of the tool replacement operation process.

[0021] 6. After the tool holder is adjusted to the position corresponding to the positioning seat, the movable end of the second cylinder drives the hinged second connecting frame to move, so that the second connecting frame drives the positioning seat to rotate, and the positioning seat rotates along with the internal shaft of the connecting seat. As the positioning seats on both sides rotate, the tool on the tool holder is clamped and fixed, ensuring the stability of the tool picking and replacing process. The rotation angle of the two positioning seats is adjusted according to the specifications of the tool, making the operation process more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a tool changing mechanism of a gantry machining center of the utility model;

[0023] Figure 2 This is a structural sectional view of a tool changing mechanism of a gantry machining center of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the tool holder of the utility model;

[0025] in, Figures 1 to 3 The correspondence between the figure marks and the component names is: 1-mounting frame, 2-top plate, 3-tool holder, 4-movable seat, 5-screw, 6-support plate, 7-positioning seat, 8-connecting seat, 9-bracket, 10-mounting plate, 11-slide rod, 12-second motor, 13-movable seat, 14-teeth, 15-base, 16-slide groove, 17-movable groove, 18-ball, 19-first cylinder, 20-second cylinder, 21-first connecting frame, 22-second connecting frame, 23-gear, 24-stabilizing rod, 25-first motor, 26-outer rod. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] The following is a combination of specific implementation cases and attached Figure 1-3 The present invention is further described below, but the present invention is not limited to these embodiments.

[0029] Example 1

[0030] A tool changing mechanism for a gantry machining center, such as Figure 1-Figure 3As shown, it includes a mounting frame 1, the side wall of the mounting frame 1 is fixedly mounted with a top plate 2 through a symmetrical bracket 9, the side wall of the top plate 2 is provided with an adjustment mechanism for driving a movable seat 4, the lower surfaces of the two brackets 9 are vertically fixed to the upper surface of the mounting frame 1 in parallel with each other, the upper surfaces of the two brackets 9 are vertically fixed to the lower surface of the top plate 2, the position of the movable seat 4 is adjusted by the adjustment mechanism, the side wall of the movable seat 4 is provided with a picking mechanism, the tool on the tool holder 3 is picked up and installed on the machining center through the picking mechanism, the side wall of the mounting frame 1 is fixedly mounted with a base 15 through a first cylinder 19, the base 15 is rotatably connected to the outside of the movable seat 13, a groove corresponding to the movable seat 13 is opened on the upper surface of the base 15, so that the movable seat 13 is embedded in the groove and fits on its inner wall to rotate circumferentially, the side wall of the movable seat 13 is fixedly mounted with a tool holder 3, the tool holder 3 is fitly fixed to the upper surface of the movable seat 3, and the cylinder end of the first cylinder 19 is vertically fixed to the upper surface of the mounting frame 1 The movable end of the first cylinder 19 is vertically fixed on the lower surface of the base 15. The first cylinder 19 is connected to the controller through two air pipes, and the two air pipes are respectively connected to the input and output ends of the compressed air. The controller controls the opening and closing of the internal solenoid valve, so that the compressed air is input into the first cylinder 19 through the air pipe, so that the movable end of the first cylinder 19 can be telescopically moved. When changing the tool, the solenoid valve of the air pipe connected to the first cylinder 19 is opened, so that the movable end of the first cylinder 19 drives the base 15 to move, so that the base 15 drives the tool holder 3 to move to the corresponding picking mechanism through the movable seat 13, and the tool is fixed by the picking mechanism and moved to the tool changing position along with the movable seat 4 through the adjustment mechanism, and then the operation is performed. The tool can be accurately adjusted according to the picking position through accurate movement in all directions, thereby ensuring the accuracy of tool change, and bringing convenience to the operation process of relevant personnel.

[0031] Among them, a sliding groove 16 is circumferentially opened on the outer wall of the movable seat 13, and a plurality of movable grooves 17 are evenly opened on the inner wall of the movable cavity of the base 15. Balls 18 are evenly embedded in the movable cavities of the plurality of movable grooves 17 and the sliding grooves 16. A circle of movable grooves 17 are opened in sequence and continuously on the inner surface of the movable seat 13 and the movable cavity of the base 15. A circle of sliding grooves 16 are opened on the outer surface of the movable seat 13 and at positions corresponding to the movable grooves 17. Balls 18 are movably embedded in multiple movable cavities formed by each movable groove 17 and the sliding groove 16. When the movable seat 13 is rotated to adjust the corresponding replaced tool according to the tool holder 3, the movable seat 13 drives the sliding groove 16 on the outer surface to slide against the outer surfaces of the plurality of ball bearings 18, and at the same time, each ball bearing 18 slides against the inner wall of each movable groove 17. The stability of the rotation process of the movable seat 13 is guaranteed by the plurality of circumferential balls 18, thereby ensuring the stability of the tool switching adjustment process, and further ensuring the accuracy of the tool adjustment and replacement position.

[0032] It is worth mentioning that a plurality of teeth 14 are evenly arranged on the circumference of the outer wall of the movable seat 13, and a first motor 25 is fixedly installed on the side wall of the base 15. A gear 23 is sleeved on the outside of the output shaft of the first motor 25, and the gear 23 meshes with the teeth 14. The gear 23 is fixedly sleeved on the outer surface of the output shaft of the first motor 25 through the central mounting hole. The first motor 25 is fixed in a position by the motor seat to ensure that the gear 23 meshes with the teeth 14 on the outer surface of the movable seat 13. The first motor 25 is electrically connected to an external power supply through a wire. When the tool position is adjusted and replaced by the tool holder 3, the first motor 25 is connected to a power supply, so that the output shaft of the first motor 25 drives the gear 23 to rotate, and the teeth 14 meshing with the gear 23 drives the movable seat 13 to rotate, and the movable seat 13 drives the tool holder 3 to rotate, making the operation process more convenient.

[0033] In addition, an outer rod 26 is symmetrically fixedly installed on the side wall of the mounting frame 1, and one end of a stabilizing rod 24 is symmetrically fixedly installed on the side wall of the base 15. The other end of the stabilizing rod 24 passes through the side wall of the outer rod 26 and extends to the inner cavity, so that the stabilizing rod 24 can telescope and slide in the internal movable cavity of the outer rod 26. When the vertical position of the tool holder 3 is adjusted by the first cylinder 19, the base 15 simultaneously drives two mutually parallel stabilizing rods 24 to slide in the inner cavities of each outer rod 26. The stability of the moving direction of the base 15 is guaranteed by the two stabilizing rods 24, and position deviation is avoided, thereby ensuring the accuracy of the position adjustment of the tool holder 3.

[0034] In addition, the adjusting mechanism includes a screw 5, both ends of which are rotatably connected to the lower side wall of the top plate 2 through symmetrical mounting plates 10, and the two mounting plates 10 are vertically fixed in parallel to each other on the edge positions on both sides of the lower surface of the top plate 2, and bearings are symmetrically embedded and installed on the opposite surfaces of the two mounting plates 10, and both ends of the screw 5 are respectively embedded and installed inside the two bearings, and the moving seat 4 is threadedly connected to the outer side wall of the screw 5, and the moving seat 4 is connected to the screw 5 through a threaded through hole opened in the inner cavity, and a second motor 12 is fixedly installed on the side wall of the top plate 2, and the output shaft of the second motor 12 is fixedly connected to one end of the screw 5. The machine 12 is electrically connected to an external power supply through a wire, and the output shaft of the second motor 12 passes through the inner cavity of the corresponding mounting plate 10 and is fixedly connected to one end of the lead screw 5. The output shaft of the second motor 12 rotates in the inner cavity of the corresponding mounting plate 10. When adjusting the position of the picking mechanism, the second motor 12 is connected to the power supply, so that the output shaft of the second motor 12 drives the lead screw 5 to rotate between the two mounting plates 10, so that the moving seat 4 threadedly connected to the outer surface of the lead screw 5 drives the picking mechanism to move, and moves the picking mechanism to the corresponding tool position, making the operation process more convenient and improving the efficiency of the tool replacement operation process.

[0035] Furthermore, a slide bar 11 is fixedly installed between the two mounting plates 10, and the movable seat 4 is slidably connected to the outside of the slide bar 11. The two ends of the slide bar 11 are respectively fixed vertically on the opposite surfaces of the two mounting plates 10. The movable seat 4 is movably sleeved on the outer surface of the slide bar 11 through the mounting holes opened in the side walls. When the lead screw 5 is rotated to allow the movable seat 4 to adjust the taking position of the positioning seat 7, the movable seat 4 slides on the outer surface of the slide bar 11 at the same time. The stability of the moving direction of the movable seat 4 is ensured by the slide bar 11 parallel to the lead screw 5, thereby ensuring the accuracy of the position adjustment of the positioning seat 7.

[0036] The picking mechanism includes two positioning seats 7, and the two positioning seats 7 are symmetrically connected to the side walls of the support plate 6 through the connecting seats 8. The support plate 6 is fixedly installed on the side wall of the movable seat 4. The support plate 6 is fitted and fixed to the lower surface of the movable seat 4. The connecting seats 8 are symmetrically fitted and fixed on the lower surface of the support plate 6. The shaft body is movably embedded in the interior of the connecting seat 8. The positioning seats 7 are fixedly sleeved on the outer surface of the shaft body through the mounting holes opened in the side walls, so that the positioning seats 7 rotate with the shaft body on the connecting seat 8. The side walls of the support plate 6 are symmetrically connected to the cylinder end of the second cylinder 20 through the first connecting frame 21. The movable end of the second cylinder 20 is rotatably connected to the second connecting frame 22. The second connecting frame 22 is fixedly installed on the side walls of the positioning seat 7. The two first connecting frames 21 are symmetrically fixed vertically on the lower surface of the support plate 6. A rotating shaft is installed inside the connecting frame 22, and the two ends of the second cylinder 20 are movably connected to the outer surface of the rotating shaft inside the first connecting frame 21 and the second connecting frame 22 through the mounting holes opened by the connecting parts, so that the two ends of the second cylinder 20 are hinged to the first connecting frame 21 and the second connecting frame 22 respectively. After the tool holder 3 is adjusted to the position corresponding to the positioning seat 7, the solenoid valve of the air guide pipe connected to the second cylinder 20 is opened, so that the movable end of the second cylinder 20 drives the hinged second connecting frame 22 to move, so that the second connecting frame 22 drives the positioning seat 7 to rotate, so that the positioning seat 7 rotates with the internal shaft of the connecting seat 8, and the tool on the tool holder 3 is clamped and fixed with the rotation of the positioning seats 7 on both sides, thereby ensuring the stability of the tool picking and replacement process. The rotation angle of the two positioning seats 7 is adjusted according to the specifications of the tool, so that the operation process is more convenient.

[0037] The tool changing mechanism of the gantry machining center of the present embodiment has the following working principle: when the tool is changed, the electromagnetic valve of the air guide pipe connected to the inside of the first cylinder 19 is opened, so that the movable end of the first cylinder 19 drives the base 15 to move, so that the base 15 drives the tool holder 3 to move to the corresponding picking position through the movable seat 13, and then the first motor 25 is connected to the power supply, so that the output shaft of the first motor 25 drives the gear 23 to rotate, so that the teeth 14 meshing with the gear 23 drives the movable seat 13 to rotate, so that the movable seat 13 drives the tool holder 3 to rotate, and the corresponding tool is rotated to the corresponding replacement position. After installation, the solenoid valve of the air duct connected to the second cylinder 20 is opened, so that the movable end of the second cylinder 20 drives the hinged second connecting frame 22 to move, and the second connecting frame 22 drives the positioning seat 7 to rotate, so that the positioning seat 7 rotates along with the internal shaft of the connecting seat 8, and the tool on the tool holder 3 is clamped and fixed as the positioning seats 7 on both sides rotate. Then, the second motor 12 is connected to the power supply, so that the output shaft of the second motor 12 drives the screw 5 to rotate between the two mounting plates 10, so that the movable seat 4 threadedly connected to the outer surface of the screw 5 drives the tool to move to the machining center for replacement.

[0038] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tool changing mechanism for a gantry machining center, comprising a mounting frame (1), characterized in that: A top plate (2) is fixedly mounted on the side wall of the mounting frame (1) via a symmetrical bracket (9); an adjustment mechanism for driving a movable seat (4) is provided on the side wall of the top plate (2); a picking mechanism is provided on the side wall of the movable seat (4); a base (15) is fixedly mounted on the side wall of the mounting frame (1) via a first cylinder (19); the base (15) is rotatably connected to the outside of a movable seat (13); and a tool holder (3) is fixedly mounted on the side wall of the movable seat (13).

2. The tool changing mechanism of a gantry machining center according to claim 1, characterized in that: The outer wall of the movable seat (13) is provided with a slide groove (16) in the circumferential direction, and the inner wall of the movable cavity of the base (15) is provided with a plurality of movable grooves (17) in the circumferential direction. Balls (18) are evenly embedded in the movable cavities of the plurality of movable grooves (17) and the slide grooves (16).

3. The tool changing mechanism of a gantry machining center according to claim 1, characterized in that: The outer wall of the movable seat (13) is evenly provided with a plurality of teeth (14) in the circumferential direction, and a first motor (25) is fixedly mounted on the side wall of the base (15). A gear (23) is sleeved on the outside of the output shaft of the first motor (25), and the gear (23) is meshed with the teeth (14).

4. The tool changing mechanism of a gantry machining center according to claim 1, characterized in that: An outer rod (26) is symmetrically fixedly mounted on the side wall of the mounting frame (1), and one end of a stabilizing rod (24) is symmetrically fixedly mounted on the side wall of the base (15); the other end of the stabilizing rod (24) penetrates the side wall of the outer rod (26) and extends to the inner cavity.

5. The tool changing mechanism of a gantry machining center according to claim 1, characterized in that: The adjustment mechanism comprises a lead screw (5), the two ends of which are rotatably connected to the side wall of the top plate (2) via symmetrical mounting plates (10), the movable seat (4) is threadedly connected to the outer side wall of the lead screw (5), a second motor (12) is fixedly mounted on the side wall of the top plate (2), and an output shaft of the second motor (12) is fixedly connected to one end of the lead screw (5).

6. The tool changing mechanism of a gantry machining center according to claim 5, characterized in that: A slide bar (11) is fixedly installed between the two mounting plates (10), and the movable seat (4) is slidably connected to the outside of the slide bar (11).

7. The tool changing mechanism of a gantry machining center according to claim 1, characterized in that: The picking mechanism comprises two positioning seats (7), the two positioning seats (7) are symmetrically connected to the side walls of the support plate (6) through the connecting seats (8), the support plate (6) is fixedly mounted on the side wall of the movable seat (4), the side wall of the support plate (6) is symmetrically connected to the cylinder end of the second cylinder (20) through the first connecting frame (21), the movable end of the second cylinder (20) is connected to the second connecting frame (22), and the second connecting frame (22) is fixedly mounted on the side wall of the positioning seat (7).

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