Machining center tool changing device

Abstract

The utility model relates to the related technical field of numerical control machine tools, in particular to a machining center tool changing device which comprises a machining table, an electric sliding rail is fixedly connected to the front face of the machining table, a machining assembly is fixedly connected to the output end of the electric sliding rail, a fixing groove is formed in the front face of the machining table, and a sliding groove is formed in the inner bottom wall of the fixing groove. The inner wall of the sliding groove is fixedly connected with a tool changing assembly. According to the tool changing device of the machining center, through the arrangement of the tool changing assembly, when the tool changing device is used, a driving motor and a lead screw can be used for driving a rectangular plate to move forwards and stretch out of a fixing groove so that a tool changing column can move to the position under a tool, and after an electric push rod drives the tool to descend, the tool can be inserted into the tool changing column and locked through an inserting groove, an inserting block and a limiting inserting block; and after locking is completed, the fixing motor rotates through the driving gear and the driven gear, so that the tool changing column is driven to carry out tool lowering operation on the tool, manual operation of workers is not needed in the whole process, and safety and tool changing efficiency are improved.

Description

Technical Field

[0001] This utility model relates to related technical fields, and in particular to a tool changing device for a machining center. Background Technology

[0002] Machining centers evolved from CNC milling machines. The biggest difference between them is that machining centers have the ability to automatically change machining tools. By installing tools for different purposes on the tool magazine, the machining tools on the spindle can be changed in one setup through an automatic tool changer, realizing multiple machining functions. It is a common industrial machining tool.

[0003] Most existing machining center tool changing structures rely on robotic arms for tool changing. However, these robotic arms often encounter problems such as incorrect clamping positions or insufficient clamping force during tool changing, making it difficult to remove the tool. In such cases, manual operation is required to separate the robotic arm from the tool and manually remove the tool, which is inefficient and has room for improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a tool changing device for machining centers, so as to solve the problems of unstable tool changing and insufficient clamping force in the existing tool changing structure mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tool changing device for a machining center, including a machining table, two positioning blocks fixedly connected to the upper surface of the machining table, hydraulic push rods fixedly connected to the opposite sides of the two positioning blocks, clamping plates fixedly connected to the output ends of the two hydraulic push rods, an electric slide rail fixedly connected to the front of the machining table, a machining component fixedly connected to the output end of the electric slide rail, a fixing groove opened on the front of the machining table, a sliding groove opened on the inner bottom wall of the fixing groove, and a tool changing component fixedly connected to the inner wall of the sliding groove;

[0006] The processing assembly includes a movable block, an electric push rod fixedly connected to the upper surface of the movable block, a tool holder fixedly connected to the output end of the electric push rod, a stabilizing plate fixedly connected to the upper surface of the tool holder, a strip frame fixedly connected to the lower surface of the movable block, a limit plate slidably connected to the inner wall of the strip frame, a servo motor fixedly connected to the upper surface of the tool holder, an internal threaded sleeve fixedly connected to the output end of the servo motor, an external threaded connecting post threadedly connected to the inner wall of the internal threaded sleeve, two slots opened on the surface of the external threaded connecting post, a limit groove opened on the inner wall of each of the two slots, and a cutting tool fixedly connected to the bottom end of the external threaded connecting post.

[0007] The tool changing assembly includes a drive motor, with a lead screw fixedly connected to the output end of the drive motor. A moving block is slidably connected to the inner bottom wall of the slide groove. A rectangular plate is fixedly connected to the upper surface of the moving block. A circular hole is opened on the upper surface of the rectangular plate. A tool changing column is rotatably connected to the inner wall of the circular hole via a bearing. Two inserts are fixedly connected to the inner wall of the tool changing column. A slot is opened at a position corresponding to the two inserts on the inner wall of the tool changing column. A cylinder is fixedly connected to the inner wall of the slot. Limiting inserts are fixedly connected to the output ends of the two cylinders. A fixing frame is fixedly connected to the upper surface of the rectangular plate. A fixing motor is fixedly connected to the upper surface of the rectangular plate. A drive gear is fixedly connected to the output end of the fixing motor. A driven gear is fixedly connected to the surface of the tool changing column.

[0008] Preferably, the upper surface of the stabilizing plate is fixedly connected to the lower surface of the limiting plate, and the lower surface of the strip frame is provided with a strip hole adapted to the stabilizing plate.

[0009] Preferably, the upper surface of the tool holder has a through hole adapted to the output end of the servo motor.

[0010] Preferably, the front end of the lead screw is rotatably connected to the inner front wall of the slide groove, and the moving block is threadedly connected to the lead screw.

[0011] Preferably, the two inserts are respectively adapted to two slots on the surface of the external threaded connecting column, and the two limiting inserts are adapted to the limiting slots.

[0012] Preferably, the upper surface of the fixing frame is provided with a circular through hole that is compatible with the tool changing column.

[0013] Preferably, the driving gear meshes with the driven gear.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This machining center tool changing device, through the tool changing assembly, can use a drive motor and lead screw to drive a rectangular plate forward and extend it out of the fixing slot to move the tool changing column to a position directly below the tool. After the electric push rod drives the tool to descend, the tool can be inserted into the tool changing column and locked by the slot, insert block and limit insert block. After locking, the fixing motor rotates through the drive gear and driven gear, thereby driving the tool changing column to perform the tool lowering operation. The whole process does not require manual operation by the operator, which improves safety and tool changing efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the three-dimensional disassembled structure of the processing components of this utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional disassembled structure of the cutting tool of this utility model;

[0018] Figure 4 This is a three-dimensional disassembled structural diagram of the tool changing assembly of this utility model;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the rectangular plate of this utility model.

[0020] In the diagram: 1. Machining table; 2. Positioning block; 3. Hydraulic push rod; 4. Clamping plate; 5. Electric slide rail; 6. Machining assembly; 7. Tool changer assembly; 601. Movable block; 602. Electric push rod; 603. Tool holder; 604. Stabilizing plate; 605. Strip frame; 606. Limiting plate; 607. Servo motor; 608. Internal threaded sleeve; 609. External threaded connecting post; 610. Slot; 611. Tool; 701. Drive motor; 702. Lead screw; 703. Moving block; 704. Rectangular plate; 705. Bearing; 706. Tool changer post; 707. Insertion block; 708. Cylinder; 709. Limiting insertion block; 710. Fixed frame; 711. Fixed motor; 712. Drive gear; 713. Driven gear. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a tool changing device for a machining center, including a machining table 1, two positioning blocks 2 are fixedly connected to the upper surface of the machining table 1, hydraulic push rods 3 are fixedly connected to the opposite sides of the two positioning blocks 2, clamping plates 4 are fixedly connected to the output ends of the two hydraulic push rods 3, an electric slide rail 5 is fixedly connected to the front of the machining table 1, a machining component 6 is fixedly connected to the output end of the electric slide rail 5, a fixing groove is opened on the front of the machining table 1, a sliding groove is opened on the inner bottom wall of the fixing groove, and a tool changing component 7 is fixedly connected to the inner wall of the sliding groove.

[0023] The processing component 6 includes a movable block 601. An electric push rod 602 is fixedly connected to the upper surface of the movable block 601. A tool holder 603 is fixedly connected to the output end of the electric push rod 602. A stabilizing plate 604 is fixedly connected to the upper surface of the tool holder 603. A strip frame 605 is fixedly connected to the lower surface of the movable block 601. A limit plate 606 is slidably connected to the inner wall of the strip frame 605. A servo motor 607 is fixedly connected to the upper surface of the tool holder 603. An internal threaded sleeve 608 is fixedly connected to the output end of the servo motor 607. An external threaded connecting post 609 is threadedly connected to the inner wall of the internal threaded sleeve 608. Two slots 610 are opened on the surface of the external threaded connecting post 609. Limit grooves are opened on the inner walls of the two slots 610. A cutting tool 611 is fixedly connected to the bottom end of the external threaded connecting post 609.

[0024] The tool changing assembly 7 includes a drive motor 701, with a lead screw 702 fixedly connected to the output end of the drive motor 701. A moving block 703 is slidably connected to the inner bottom wall of the slide groove. A rectangular plate 704 is fixedly connected to the upper surface of the moving block 703. A circular hole is opened on the upper surface of the rectangular plate 704. A tool changing column 706 is rotatably connected to the inner wall of the circular hole via a bearing 705. Two inserts 707 are fixedly connected to the inner wall of the tool changing column 706. A slot is opened at the position corresponding to the two inserts 707 on the inner wall of the tool changing column 706. A cylinder 708 is fixedly connected to the inner wall of the slot. A limit insert 709 is fixedly connected to the output end of each of the two cylinders 708. A fixed frame 710 is fixedly connected to the upper surface of the rectangular plate 704. A fixed motor 711 is fixedly connected to the upper surface of the rectangular plate 704. A drive gear 712 is fixedly connected to the output end of the fixed motor 711. A driven gear 713 is fixedly connected to the surface of the tool changing column 706.

[0025] Furthermore, the upper surface of the stabilizing plate 604 is fixedly connected to the lower surface of the limiting plate 606, and the lower surface of the strip frame 605 is provided with a strip hole that matches the stabilizing plate 604.

[0026] Furthermore, the upper surface of the tool holder 603 is provided with a through hole that matches the output end of the servo motor 607. The servo motor 607 can drive the internal threaded sleeve 608 to rotate, thereby driving the tool to rotate and perform machining.

[0027] Furthermore, the front end of the lead screw 702 is rotatably connected to the inner front wall of the slide groove, and the moving block 703 is threadedly connected to the lead screw 702. After the drive motor 701 drives the lead screw 702 to rotate, the lead screw 702 can drive the moving block 703 to move back and forth in the slide groove, thereby driving the tool changing assembly 7 to extend out of the fixed groove through the rectangular plate 704 to complete the tool changing operation. During the normal machining process of the tool 611, the tool changing assembly 7 is stored in the fixed groove and will not affect the machining process.

[0028] Furthermore, the two inserts 707 are respectively adapted to the two slots 610 on the surface of the external threaded connecting post 609, and the two limiting inserts 709 are adapted to the limiting groove. The two inserts 707 can be inserted into the slots 610. At the same time, after the two cylinders 708 are started, they can drive the two limiting inserts 709 to be inserted into the limiting groove, thereby locking the tool changing post 706 and the tool 611.

[0029] Furthermore, the upper surface of the fixing frame 710 is provided with a circular through hole that matches the tool changing column 706, and the fixing frame 710 can protect the driving gear 712 and the driven gear 713.

[0030] Furthermore, the driving gear 712 meshes with the driven gear 713. After the fixed motor 711 is started, it can drive the tool changing column 706 to rotate through the driving gear 712 and the driven gear 713, thereby driving the external threaded connecting column 609 on the tool 611 to rotate out from the internal threaded sleeve 608, thus completing the tool changing operation.

[0031] Working principle: First, the two hydraulic push rods 3 drive the two clamping plates 4 to move towards each other, thus clamping them between the two positioning blocks 2. At this time, the electric push rod 602 drives the tool holder 603 to descend, thereby driving the tool 611 to perform machining operations on the workpiece. During the descent, the tool holder 603 can drive the limiting plate 606 to descend within the strip frame 605 through the stabilizing plate 604, thus ensuring the stability of the tool holder 603. The electric slide rail 5 drives the tool 611 to move left and right, thus facilitating machining operations on different positions of the workpiece. When it is necessary to change the tool 611, the drive motor 701 is turned on. The drive motor 701 drives the lead screw 702 to rotate, and the lead screw 702 drives the moving block 703 to move forward. The moving block 703 can drive the rectangular plate 704 to extend out of the fixing groove, thereby moving the tool changing column 706. When the tool is positioned directly below the tool 611, the electric push rod 602 lowers the tool holder 603, causing the tool 611 to be inserted into the tool changing column 706. At this time, the two inserts 707 on the inner wall of the tool changing column 706 can be inserted into the two slots 610 on the surface of the external threaded connecting column 609. Simultaneously, the two cylinders 708 are activated, causing the limit inserts 709 to be inserted into the limit slots, thereby locking the tool changing column 706 and the tool 611. At this time, the fixed motor 711 is activated, and the fixed motor 711 can drive the tool changing column 706 to rotate through the driving gear 712 and the driven gear 713. The tool changing column 706 then drives the external threaded connecting column 609 to rotate within the internal threaded sleeve 608, thereby unscrewing the tool 611 from within the internal threaded sleeve 608, completing the tool changing operation of the tool 611. This eliminates the need for manual operation by the operator and improves the tool changing efficiency.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool changer for a machining center comprising a machining table (1), characterized in that: The upper surface of the machining table (1) is fixedly connected with two positioning blocks (2), the opposite surfaces of the two positioning blocks (2) are fixedly connected with hydraulic push rods (3), the output ends of the two hydraulic push rods (3) are fixedly connected with clamping plates (4), the front surface of the machining table (1) is fixedly connected with an electric sliding rail (5), the output end of the electric sliding rail (5) is fixedly connected with a machining assembly (6), the front surface of the machining table (1) is provided with a fixed groove, the inner bottom wall of the fixed groove is provided with a sliding groove, and the inner wall of the sliding groove is fixedly connected with a tool changing assembly (7). The machining assembly (6) comprises a movable block (601), the upper surface of the movable block (601) is fixedly connected with an electric push rod (602), the output end of the electric push rod (602) is fixedly connected with a tool holder (603), the upper surface of the tool holder (603) is fixedly connected with a stabilizing plate (604), the lower surface of the movable block (601) is fixedly connected with a strip-shaped frame (605), the inner wall of the strip-shaped frame (605) is slidably connected with a limiting plate (606), the upper surface of the tool holder (603) is fixedly connected with a servo motor (607), the output end of the servo motor (607) is fixedly connected with an internally-threaded sleeve (608), the inner wall of the internally-threaded sleeve (608) is threadedly connected with an externally-threaded connecting column (609), the surface of the externally-threaded connecting column (609) is provided with two insertion grooves (610), the inner walls of the two insertion grooves (610) are each provided with a limiting groove, and the bottom end of the externally-threaded connecting column (609) is fixedly connected with a tool (611). The tool changing assembly (7) comprises a driving motor (701), the output end of the driving motor (701) is fixedly connected with a lead screw (702), the inner bottom wall of the sliding groove is slidably connected with a moving block (703), the upper surface of the moving block (703) is fixedly connected with a rectangular plate (704), the upper surface of the rectangular plate (704) is provided with a circular hole, the inner wall of the circular hole is rotatably connected with a tool changing column (706) through a bearing (705), the inner wall of the tool changing column (706) is fixedly connected with two insertion blocks (707), the inner wall of the tool changing column (706) is provided with a clamping groove at positions corresponding to the two insertion blocks (707), the inner wall of the clamping groove is fixedly connected with an air cylinder (708), the output ends of the two air cylinders (708) are each fixedly connected with a limiting insertion block (709), the upper surface of the rectangular plate (704) is fixedly connected with a fixed frame (710), the upper surface of the rectangular plate (704) is fixedly connected with a fixed motor (711), the output end of the fixed motor (711) is fixedly connected with a driving gear (712), the surface of the tool changing column (706) is fixedly connected with a driven gear (713).

2. A tool changer for a machining center according to claim 1, characterized in that: The upper surface of the stabilizing plate (604) is fixedly connected with the lower surface of the limiting plate (606), and the lower surface of the strip-shaped frame (605) is provided with a strip-shaped hole matched with the stabilizing plate (604).

3. The tool changer of claim 1, wherein: The upper surface of the tool holder (603) is provided with a through hole matched with the output end of the servo motor (607).

4. The tool changer of claim 1, wherein: The front end of the lead screw (702) is rotatably connected with the inner front wall of the sliding groove, and the moving block (703) is threadedly connected with the lead screw (702).

5. The tool changer of claim 1, wherein: Two said plug blocks (707) are respectively matched with two insertion slots (610) on the surface of the outer threaded connecting column (609), and two limiting plug blocks (709) are matched with limiting slots.

6. The tool changer of claim 1, wherein: The upper surface of the fixing frame (710) is provided with a circular through hole matched with the tool changing column (706).

7. The tool changer of claim 1, wherein: The driving gear (712) is engaged with the driven gear (713).

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