Automatic tool changer for CNC machining center

Abstract

The utility model discloses an automatic tool changer for a CNC (computerized numerical control) machining center, which relates to the technical field of CNC milling machines and comprises a machining table, a machining mechanism is mounted on the inner side of the machining table, a tool is detachably mounted on the machining mechanism through a mounting seat at the bottom of the machining mechanism, and a tool changing component is arranged on the mounting seat. According to the automatic tool changer for the CNC machining center, by arranging the tool changing assembly, when a tool is mounted, the tool is upwards inserted into the inner side of a mounting base to push a lifting rod to move upwards, then through linkage of the lifting rod, a rack, a gear, a pushing piece and a movable plate, all clamping rotating blocks are pushed to rotate together and clamped to the inner side of a mounting groove of the tool, and the tool is mounted in the mounting groove; therefore, the situation that the clamping effect of the cutter is unstable due to the fact that the soft block and the soft strip are clamped and limited and lose elasticity and even are damaged due to friction in long-term use is avoided, and the machining effect is also guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control milling machine technical field, concretely is a kind of automatic tool changer for numerical control CNC machining center. BACKGROUND

[0002] Numerical control machining center is by mechanical equipment and numerical control system composition is suitable for processing complex parts high efficiency automation machine tool, numerical control machining center is one of the highest output, the most widely used numerical control machine tool in the world, a large number of tools are needed in the machining process of numerical control machining center, and the tool will gradually wear and tear in the use process, in turn affect the processing efficiency and effect, therefore, the tool needs to be replaced regularly.

[0003] The existing numerical control machine tool head will be broken due to long-term contact and wear with materials, and at this time the surface of the tool head is in a high temperature state, and the broken part of the tool head is very sharp, and manual taking down will cause burns and scratches, in order to overcome the above defects, the prior art (Chinese patent with application number 202323149383.2 and application date of November 22, 2023) a quick tool changing structure for three-axis numerical control machining center, by sleeving the clamping joint on the surface of the three-axis numerical control tool head, sliding and extruding the threaded rod in the limiting threaded sleeve, extruding one end of it on the surface of the three-axis numerical control tool head, with the continuous extrusion of the threaded rod, cooperating with the arc-shaped anti-skid heat-resistant soft block and the trapezoidal elastic soft strip to increase the friction and compression force of the two semicircular soft strips, the three-axis numerical control tool head can be effectively clamped and limited, but the above structure gradually loses elasticity and even causes friction damage in the use process due to long-term extrusion deformation of the soft block and the soft strip, in turn weakens the clamping effect of the three-axis numerical control tool head, so that the machining effect is also affected.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original equipment, therefore we put forward an automatic tool changer for numerical control CNC machining center which can well solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing an automatic tool changer for numerical control CNC machining center to solve the problem that the above structure gradually loses elasticity and even causes friction damage in the use process due to long-term extrusion deformation of the soft block and the soft strip, in turn weakens the clamping effect of the three-axis numerical control tool head, so that the machining effect is also affected.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of automatic tool changer for numerical control CNC machining center, including processing machine table, the inner side top of processing machine table is movably installed with processing mechanism, and the bottom of processing mechanism is provided with tool;The tool is detachably installed by the fixed mounting seat of bottom of processing mechanism, tool changing assembly is provided on the mounting seat, the tool changing assembly includes multiple clamping rotating blocks movably connected to the inner side of mounting seat, and clamping rotating blocks are linked in pairs, the outer wall of tool is provided with installation groove, and multiple clamping rotating blocks are clamped in the inner side of installation groove, the outer wall of one of clamping rotating blocks is formed with moving plate, and moving plate rotates and penetrates to the outer side of mounting seat, the outer wall of mounting seat is rotatably connected with fixed push piece and gear, and the side of push piece is abutted with moving plate, the side of gear is engaged with rack, the bottom side wall of mounting seat is vertically slidably connected with lifting rod, and lifting rod is connected to the bottom side of rack.

[0007] Preferably, the inner side of the processing machine table is provided with a moving assembly, the moving assembly includes an electric sliding seat slidably installed on the inner side wall of the processing machine table, and a connecting seat is fixedly installed on the side wall of the electric sliding seat, a power-driven electric rotating rod is rotatably installed on the inner side of the connecting seat, a sleeve joint is formed on one side of the electric rotating rod, and the sleeve joint is located directly below the tool, and a tool magazine is provided on the outer side of the processing machine table.

[0008] Preferably, an electromagnet is embeddedly installed on the inner side of the sleeve joint of the electric rotating rod, and the electromagnet can tightly adsorb the tool when electrified.

[0009] Preferably, a plurality of limiting sliding grooves are formed on the inner top and bottom ends of the mounting seat, limiting sliding blocks are formed on the top and bottom ends of each clamping rotating block, the limiting sliding blocks are slidably arranged in the limiting sliding grooves, and a spring is fixedly connected between the limiting sliding groove and the limiting sliding block at the bottom end.

[0010] Preferably, a convex ring is formed on the outer wall of the tool, and the convex ring is abutted with the bottom of the lifting rod to fix the lifting rod and the rack at a certain height.

[0011] Preferably, an electric push rod is fixedly installed inside the top end of the lifting rod, and the rod body output end of the electric push rod is fixedly connected with the rack.

[0012] Preferably, the push piece and the gear are elastically rotatable on the outer wall of the mounting seat through a torsion spring, and the push piece has an oval structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This automatic tool changer for CNC machining centers, by setting up a tool changing assembly, inserts the tool upward into the inner side of the mounting base during tool installation, causing it to push the lifting rod upward. Then, through the linkage of the lifting rod, rack, gear, push plate, and moving plate, all the locking blocks are pushed to rotate together and lock into the inner side of the tool mounting groove, thereby stabilizing the tool installation. This avoids the situation where using soft blocks and soft strips for locking and limiting, which may lose elasticity or even suffer friction damage during long-term use, leading to unstable tool locking effect. It also ensures the machining effect. The contents are as follows: (1) By setting up the tool changing assembly, when installing the tool, inserting the tool upward into the inner side of the mounting base will push the lifting rod to move upward, the rack to move upward synchronously and drive the meshing gear to rotate, the pushing plate to rotate synchronously and push the moving plate to abut against the fixed position, the locking block to rotate accordingly, and through the linkage between them, all the locking blocks to rotate together and lock into the inner side of the tool mounting groove, thereby stabilizing the tool installation, so as to avoid the situation where the tool locking effect is unstable due to the loss of elasticity or even friction damage caused by using soft blocks and soft strips for locking and limiting, and also to ensure the processing effect.

[0014] (2) By setting up a moving component, if the tool is damaged and broken, the electric slide will automatically start to drive the connecting seat and the electric rotating rod to move up and then down. The tool can be pulled out through the socket of the electric rotating rod. At the same time, the motor drives the electric rotating rod to rotate the tool to the tool changer and replace it with a new tool. Then, the above process is reversed once to install the new tool on the mounting seat. The whole process is automated and does not require manual intervention. It is safe, convenient and has high tool changing efficiency.

[0015] (3) By limiting the sliding of the limiting slider to the inside of the limiting groove, the sliding trajectory of the snap-fit ​​block can be precisely limited to ensure the stability of the snap-fit ​​block snapping into the inside of the mounting groove. Furthermore, by using the spring between the limiting groove and the limiting slider, after the limiting of the moving plate is released, each snap-fit ​​block can automatically rebound and move to disengage from the mounting groove, thereby realizing the disassembly of the tool.

[0016] (4) When disassembling the tool, the electric push rod is automatically started, which causes the rod to extend and push the rack to move outward until it is disengaged from the gear. At this time, under the action of the torsion spring, the push plate and the gear rotate, which releases the limiting effect on the moving plate, and then the tool is disassembled. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the mobile component of this utility model;

[0019] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is an exploded structural diagram of the tool changing assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the separation structure of the mounting base and the cutting tool of this utility model;

[0022] Figure 6 This is a schematic diagram of the connection structure between the lifting rod and the rack of this utility model.

[0023] In the diagram: 1. Machining machine base; 2. Machining mechanism; 3. Mounting base; 4. Cutting tool; 5. Electric slide; 6. Connecting base; 7. Electric rotating rod; 8. Electromagnet; 9. Snap-fit ​​rotating block; 10. Limiting slide groove; 11. Limiting slider; 12. Mounting groove; 13. Moving plate; 14. Push plate; 15. Gear; 16. Rack; 17. Lifting rod; 18. Electric push rod; 19. Spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-6 This utility model provides the following technical solution: an automatic tool changer for a CNC machining center, including a machining table 1, a machining mechanism 2 movably mounted on the inner top of the machining table 1, and a tool 4 disposed at the bottom of the machining mechanism 2; the machining mechanism 2 detachably mounts the tool 4 via a mounting base 3 fixed at the bottom, and a tool changing assembly is disposed on the mounting base 3, the tool changing assembly including multiple snap-fit ​​rotating blocks 9 movably connected to the inner side of the mounting base 3, and the snap-fit ​​rotating blocks 9 are linked and interconnected in pairs, and a mounting bracket is provided on the outer wall of the tool 4. The mounting groove 12 is installed, and multiple snap-fit ​​rotating blocks 9 are snapped together on the inner side of the mounting groove 12. The outer wall of one of the snap-fit ​​rotating blocks 9 is formed with a movable plate 13, and the movable plate 13 rotates through to the outer side of the mounting base 3. The outer wall of the mounting base 3 is rotatably connected with a fixed push plate 14 and a gear 15, and one side of the push plate 14 abuts against the movable plate 13. One side of the gear 15 is meshed with a rack 16. The bottom side wall of the mounting base 3 is vertically slidably connected with a lifting rod 17, and the lifting rod 17 is connected to the bottom side of the rack 16.

[0026] By setting up the tool changing assembly, when installing the tool 4, the tool 4 is inserted upward into the inner side of the mounting base 3. When the tool 4 moves, it pushes the lifting rod 17 upward, the rack 16 moves upward synchronously and drives the meshing gear 15 to rotate, and the pushing plate 14 rotates synchronously to the horizontal direction, thereby pushing the moving plate 13 and stably abutting it in the fixed position. When the moving plate 13 rotates, its corresponding locking block 9 also rotates synchronously. Through the linkage between the locking blocks 9, all the locking blocks 9 rotate together. In this way, the locking blocks 9 will rotate inward and be firmly locked in the inner side of the mounting groove 12 of the tool 4, thereby stably installing the tool 4. This avoids the situation where the locking effect of the tool 4 is unstable due to the loss of elasticity or even friction damage caused by using soft blocks and soft strips for locking and limiting, and also ensures the processing effect.

[0027] Furthermore, the outer wall of the cutter 4 is formed with a convex ring, which abuts against the bottom of the lifting rod 17 to fix the lifting rod 17 and the rack 16 at a certain height, thereby fixing the gear 15 and the pushing plate 14 axially, thus ensuring the effect of the pushing plate 14 pushing the moving plate 13 to fix the locking block 9, thereby achieving the stability of the locking block 9 being locked in the inner side of the mounting groove 12 to install the cutter 4.

[0028] Example 2: Based on Example 1, a moving component is provided on the inner side of the machining table 1. The moving component includes an electric slide 5 slidably mounted on the inner wall of the machining table 1, and a connecting seat 6 is fixedly mounted on the side wall of the electric slide 5. An electric rotating rod 7 driven by a motor is rotatably mounted on the inner side of the connecting seat 6, and a sleeve joint is formed on one side of the electric rotating rod 7. The sleeve joint is located directly below the tool 4. An electromagnet 8 is fitted inside the sleeve joint of the electric rotating rod 7. When the electromagnet 8 is energized, it can tightly attract the tool 4 to achieve the effect of clamping and moving it. A tool changer is provided on the outer side of the machining table 1. If the tool 4 is damaged or broken, the electric slide 5 automatically starts, driving the connecting seat 6 and the electric rotating rod 7 to move upward, so that the socket of the electric rotating rod 7 is fitted onto the outside of the tool 4 and clamped by the electromagnet 8. Meanwhile, the electric slide 5 drives the connecting seat 6 and the electric rotating rod 7 to move downward to remove the tool 4. During this process, the motor drives the electric rotating rod 7 to rotate, so that the tool 4 rotates synchronously to the tool changer. The removed tool 4 is inserted into the magazine, and the new tool 4 is taken out. Then, the above process is reversed once to install the new tool 4 on the mounting seat 3. The whole process is automated, requiring no manual intervention, which is safe, convenient, and has high tool changing efficiency.

[0029] Multiple limiting grooves 10 are provided at the top and bottom of the inner side of the mounting base 3. Each snap-fit ​​rotating block 9 has a limiting slider 11 formed at its top and bottom. The limiting slider 11 slides on the inner side of the limiting groove 10. A spring 19 is fixedly connected between the limiting groove 10 at the bottom and the limiting slider 11. By limiting the sliding of the limiting slider 11 to the inner side of the limiting groove 10, the sliding trajectory of the snap-fit ​​rotating block 9 can be precisely limited to ensure the stability of the snap-fit ​​rotating block 9 snapping into the inner side of the mounting groove 12. Furthermore, the spring 19 provided between the limiting groove 10 and the limiting slider 11 can automatically cause each snap-fit ​​rotating block 9 to spring back and move out of the mounting groove 12 after the limiting of the moving plate 13 is released, so as to realize the disassembly of the tool 4.

[0030] Meanwhile, an electric push rod 18 is fixedly installed inside the top of the lifting rod 17, and the output end of the electric push rod 18 is fixedly connected to the rack 16. The push plate 14 and the gear 15 rotate elastically on the outer wall of the mounting base 3 through the torsion spring. The push plate 14 has an elliptical structure. When the tool 4 is disassembled, the electric push rod 18 is automatically started, which causes the rod to extend and pushes the rack 16 to move outward until it is disengaged from the gear 15. At this time, under the torsion spring, the push plate 14 and the gear 15 automatically rotate, and the push plate 14 becomes vertical, which releases the limiting effect on the moving plate 13, thereby realizing the disassembly of the tool 4.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic tool changer for a CNC machining center, comprising a machining table (1), wherein a machining mechanism (2) is movably mounted on the inner side of the machining table (1), and a cutting tool (4) is provided at the bottom of the machining mechanism (2); Its features are: The processing mechanism (2) detachably mounts the tool (4) through the mounting base (3) fixed at the bottom. The mounting base (3) is provided with a tool changing assembly. The tool changing assembly includes multiple snap-fit ​​rotating blocks (9) movably connected to the inner side of the mounting base (3). The outer wall of the tool (4) is provided with a mounting groove (12), and the snap-fit ​​rotating block (9) snaps into the inner side of the mounting groove (12). One of the snap-fit ​​rotating blocks (9) has a movable plate (13) formed on its outer wall. The outer wall of the mounting base (3) is rotatably provided with a fixed push plate (14) and a gear (15). One side of the push plate (14) abuts against the movable plate (13). One side of the gear (15) meshes with a rack (16). The side wall of the mounting base (3) is slidably provided with a lifting rod (17), and the lifting rod (17) is connected to the rack (16).

2. The automatic tool changer for a CNC machining center according to claim 1, characterized in that: The inner side of the machining table (1) is provided with a moving component, which includes an electric slide (5) that is slidably installed on the inner side wall of the machining table (1). A connecting seat (6) is fixedly installed on the side wall of the electric slide (5). An electric rotating rod (7) driven by a motor is rotatably installed on the inner side of the connecting seat (6). A sleeve joint is formed on one side of the electric rotating rod (7), and the sleeve joint is located directly below the tool (4). A tool changer is provided on the outer side of the machining table (1).

3. An automatic tool changer for a CNC machining center according to claim 2, characterized in that: An electromagnet (8) is fitted inside the socket of the electric rotating rod (7). When the electromagnet (8) is energized, it can be tightly attracted to the cutting tool (4).

4. An automatic tool changer for a CNC machining center according to claim 1, characterized in that: The mounting base (3) has multiple limiting grooves (10) at its top and bottom. Each snap-fit ​​rotating block (9) has a limiting slider (11) formed at its top and bottom. The limiting slider (11) slides inside the limiting groove (10). A spring (19) is fixedly connected between the limiting groove (10) at the bottom and the limiting slider (11).

5. An automatic tool changer for a CNC machining center according to claim 1, characterized in that: The outer wall of the cutting tool (4) is formed with a convex ring, and the convex ring abuts against the bottom of the lifting rod (17) to fix the lifting rod (17) and the rack (16) at a certain height.

6. An automatic tool changer for a CNC machining center according to claim 5, characterized in that: An electric push rod (18) is fixedly installed inside the top of the lifting rod (17), and the output end of the electric push rod (18) is fixedly connected to the rack (16).

7. An automatic tool changer for a CNC machining center according to claim 6, characterized in that: The push plate (14) and the gear (15) are elastically rotated on the outer wall of the mounting base (3) by a torsion spring, and the push plate (14) has an elliptical structure.

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