A double-spindle high-speed high-efficiency vertical machining center tool magazine structure

Abstract

This application discloses a tool magazine structure for a dual-spindle high-speed, high-efficiency vertical machining center, relating to the technical field of machining centers. It includes a base and a shared tool magazine fixedly mounted on the base. Multiple tool holders are slidably arranged circumferentially within the shared tool magazine. The tool magazine contains a transmission assembly for driving the sliding of each tool holder. Each tool holder has a magnetic suction element for fixing the tool. The tool magazine has a tool outlet. Two spare tool holders are slidably mounted on the base, each corresponding to a spindle. The base is equipped with a first driving element for driving the sliding of each spare tool holder. Each spare tool holder has a tool changing mechanism. This application improves the tool changing efficiency of a dual-spindle machining center.

Description

Technical Field

[0001] This application relates to the technical field of machining centers, and in particular to a tool magazine structure for a dual-spindle high-speed and high-efficiency vertical machining center. Background Technology

[0002] With the revitalization and development of the national equipment manufacturing industry, CNC machine tools, as the mainstream product of the machine tool industry, have become key equipment for realizing the modernization of the equipment manufacturing industry. Conventional machining centers occupy a large area, and workers have to walk a long distance when operating multiple machines, thus increasing the labor intensity of workers and affecting work efficiency. In addition, with the shrinking land resources, the cost of machining sites is getting higher and higher. Therefore, there is a desire for more compact and smaller equipment to improve the workshop's volume utilization and reduce management costs. In recent years, many dual-spindle vertical machining centers have appeared on the market. They all adopt the traditional vertical machining center's parallel dual-spindle structure, which can complete the simultaneous machining of two parts in one clamping, greatly improving the machining efficiency of parts.

[0003] As a crucial component of a dual-spindle machining center, the tool magazine is typically equipped with a dedicated robotic arm for changing tools between the two spindles. However, during tool changing, the robotic arm in the tool magazine can only grasp one tool at a time. It must first remove the used tool from the spindle and place it in the tool holder of the tool magazine, then remove the unused tool from the tool holder and finally install it onto the spindle. If multiple workpieces are being machined simultaneously, the robotic arm must repeat this process multiple times to complete the tool change between the two spindles, resulting in slow tool changing speed and severely impacting work efficiency. Summary of the Invention

[0004] To improve the tool changing efficiency of dual-spindle machining centers, this application provides a tool magazine structure for a dual-spindle high-speed and high-efficiency vertical machining center.

[0005] This application provides a dual-spindle high-speed and high-efficiency vertical machining center tool magazine structure, which adopts the following technical solution:

[0006] A tool magazine structure for a dual-spindle high-speed and high-efficiency vertical machining center includes a base and a shared tool magazine fixedly mounted on the base. Multiple tool holders are slidably arranged circumferentially within the shared tool magazine. A transmission component is provided within the shared tool magazine to drive the sliding of each tool holder. Each tool holder is equipped with a magnetic suction element for fixing the tool. The shared tool magazine has a tool outlet. Two spare tool holders are slidably mounted on the base, each spare tool holder corresponding to a spindle. A first driving component is provided on the base to drive the sliding of each spare tool holder. Each spare tool holder has a tool changing mechanism.

[0007] Optionally, the transmission assembly includes a first toothed disc, a second toothed disc, a chain belt plate, and a first drive source. The first toothed disc and the second toothed disc are rotatably disposed within the shared tool magazine. The chain belt plate is wound around the first toothed disc and the second toothed disc and meshes with the first toothed disc and the second toothed disc respectively. The first drive source is used to drive the first toothed disc to rotate. Each of the tool holders is fixedly connected to the chain belt plate.

[0008] Optionally, a storage box is fixedly installed on the tool holder, a storage rack is rotatably installed inside the storage box, a second drive source is provided on the tool holder for driving the storage rack to rotate, a sleeve is fixedly installed on the storage rack, and the magnetic suction component is used to fix the tool inside the sleeve.

[0009] Optionally, the storage box has an access panel on its side wall, a cover plate is hinged to the access panel, and a limiting component is provided on the storage box to prevent the cover plate from rotating.

[0010] Optionally, the limiting component includes a locking block, a lever block, and a first elastic element. The side wall of the inspection port has an installation groove, the locking block is slidably disposed in the installation groove, the side wall of the storage box has an elongated groove communicating with the installation groove along the sliding direction of the locking block, the lever block is slidably disposed in the elongated groove and fixedly connected to the locking block, the first elastic element is used to drive the locking block to slide towards the cover plate, and the cover plate has a locking groove for the locking block to be inserted.

[0011] Optionally, the locking block has a guide slope at one end near the cover plate, and the cover plate is used to abut against the guide slope and drive the locking block to slide away from the cover plate.

[0012] Optionally, the storage box is provided with a second elastic element for driving the cover to flip away from the storage box.

[0013] Optionally, the tool changing mechanism includes a tool changing frame rotatably mounted on the tool preparation frame and a tool taking frame slidably mounted on the tool changing frame. At least two tool taking frames are provided, and they are respectively located on both sides of the tool changing frame. The tool preparation frame is provided with a third drive source for driving the tool changing frame to rotate. The tool changing frame is provided with a second drive member for driving each of the tool taking frames to slide. The tool taking frame is provided with a clamping mechanism for clamping the tool.

[0014] Optionally, the clamping mechanism includes a first clamp, a second clamp, and a drive assembly. The first and second clamps are both hinged to the tool holder, and a clamping area for clamping the tool is formed between the first and second clamps. The drive assembly is used to drive the first and second clamps to deflect in a direction that moves closer to or further away from each other.

[0015] Optionally, the driving assembly includes a third elastic element, a sliding sleeve, and a third driving element. The third elastic element is used to drive the first and second sleeves to deflect in a direction away from each other. The sliding sleeve is slidably sleeved on the first and second sleeves. The third driving element is used to drive the sliding sleeve to slide.

[0016] In summary, this application has the following beneficial technical effects:

[0017] 1. Various cutting tools used for machining are stored on separate tool holders in a shared tool magazine. During the machining process, the tools on both spindles are driven by a drive assembly to move the tool holders within the shared tool magazine, moving the next set of tools to be replaced to the tool exit position. The tool changing mechanism then stores the next set of tools to be replaced on two spare tool holders. When it is necessary to replace the tools on the spindle, the first drive assembly simply moves the corresponding spare tool holder to the spindle position, and the tool changing mechanism replaces the tools on the spindle with the tools stored on the spare tool holders, thus completing the tool change for the spindle. When changing tools on the two spindles of a dual-spindle machining center, the two spare tool holders do not interfere with each other, and the tools to be replaced are stored in advance by the two spare tool holders, which greatly improves the tool changing efficiency of the dual-spindle machining center. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0019] Figure 2 This is a schematic diagram illustrating the structure of a shared tool magazine according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram illustrating the structure of the tool holder according to an embodiment of this application;

[0021] Figure 4 yes Figure 3 Enlarged view of section A;

[0022] Figure 5 This is a schematic diagram illustrating the structure of the tool holder in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Base; 11. First drive unit; 2. Shared tool magazine; 21. Tool outlet; 22. First gear plate; 23. Second gear plate; 24. Chain belt plate; 25. First drive source; 3. Tool holder; 31. Tool changer; 32. Tool retrieval holder; 321. First clamp; 322. Second clamp; 323. Third elastic element; 324. Sliding sleeve; 325. Third drive unit; 33. Third drive source; 34. Second drive unit; 4. Tool storage holder; 41. Storage box; 411. Inspection port; 412. Cover plate; 4121. Locking groove; 413. Locking block; 414. Pulley; 415. First elastic element; 416. Second elastic element; 42. Storage rack; 421. Sleeve; 422. Magnetic suction element; 43. Second drive source. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a tool magazine structure for a dual-spindle high-speed, high-efficiency vertical machining center. (Refer to...) Figure 1 , 2 It includes a base 1, a shared tool magazine 2 fixedly mounted on the base 1, and two spare tool holders 3 slidably mounted on the base 1. The spare tool holders 3 correspond one-to-one with the two spindles of the dual-spindle machining center. The shared tool magazine 2 has two tool outlets 21, which correspond one-to-one with the spare tool holders 3.

[0026] Reference Figure 2 Multiple tool holders 4 are slidably arranged along the circumference of the shared tool magazine 2. A transmission assembly for driving the sliding of each tool holder 4 is provided within the shared tool magazine 2. The transmission assembly includes a first gear disc 22, a second gear disc 23, a chain belt plate 24, and a first drive source 25. Both the first gear disc 22 and the second gear disc 23 are rotatably arranged within the shared tool magazine 2. The chain belt plate 24 is wound around the first gear disc 22 and the second gear disc 23, and the chain of the chain belt plate 24 is connected to the first gear disc 22 and the second gear disc respectively. 23. Engagement: Each tool holder 4 is fixedly connected to the plate of the chain belt plate 24, and each tool holder 4 is evenly distributed along the circumference of the chain belt plate 24. The first drive source 25 includes a first motor, which is fixedly mounted on the base 1. The output shaft of the first motor extends into the shared tool magazine 2 and is coaxially fixedly connected to the first gear plate 22. The first motor drives the first gear plate 22 to rotate, thereby driving the chain belt plate 24 to drive each tool holder 4 to move along the circumference of the shared tool magazine 2.

[0027] Reference Figure 3Each tool holder 4 is fixedly equipped with a storage box 41. The side wall of the storage box 41 is open, and a storage rack 42 is rotatably mounted inside the storage box 41. The tool holder 4 is equipped with a second drive source 43 for driving the storage rack 42 to rotate. The second drive source 43 includes a second motor, which is fixedly mounted on the tool holder 4. The output shaft of the second motor is fixedly connected to the storage rack 42. A sleeve 421 is fixedly mounted on the storage rack 42. The sleeve 421 is adapted to the tool. The storage rack 42 is also equipped with a magnetic suction element 422, which is a magnet, and the magnet is fixedly mounted on the storage rack 42.

[0028] Insert the knife into the sleeve 421 and hold it in place with a magnet. Then, drive the storage rack 42 to rotate via the second motor, so that the knife enters the storage box 41 and is stored on the knife rack 4. Since the knife is stored in the storage box 41 and held in place by a magnet, the knife is less likely to slip off the knife rack 4 when it moves within the shared knife magazine 2. When it is necessary to remove the knife from the knife rack 4, the second motor rotates the storage rack 42 out of the storage box 41, and the knife can be removed from the knife rack 4.

[0029] Reference Figure 3 , 4 The storage box 41 has an access port 411 on its side wall, and a cover plate 412 is hinged to the access port 411. The storage box 41 is equipped with a limiting component to prevent the cover plate 412 from rotating. The limiting component includes a locking block 413, a lever block 414, and a first elastic element 415. The side wall of the access port 411 has a mounting groove, and the locking block 413 is slidably disposed within the mounting groove. The side wall of the storage box 41 has an elongated groove along the sliding direction of the locking block 413, communicating with the mounting groove. The lever block 414 is slidably disposed within the elongated groove and... The locking block 413 is fixedly connected. The first elastic element 415 includes a compression spring. The first compression spring is set in the mounting groove. One end of the compression spring abuts against the bottom wall of the mounting groove, and the other end of the compression spring abuts against the locking block 413. The cover plate 412 is provided with a locking groove 4121 for the locking block 413 to be inserted. Since the tool will wear to varying degrees after a period of use, the tool can be taken out from the storage box 41 by opening the cover plate 412 at the inspection port 411, which is convenient for the tool to be maintained.

[0030] Reference Figure 4The locking block 413 has a guide slope at one end near the cover plate 412. The guide slope gradually approaches the compression spring in a direction away from the inside of the storage box 41. When it is necessary to close the access port 411, the cover plate 412 is rotated, and the cover plate 412 abuts against the guide slope of the locking block 413. Under the guidance of the guide slope, the locking block 413 is driven to slide into the mounting groove. When the cover plate 412 closes the access port 411, and the locking block 413 is aligned with the locking groove 4121 on the cover plate 412, the locking block 413 is inserted into the locking groove 4121 of the cover plate 412 under the elastic force of the compression spring, which can limit the cover plate 412 and make it more convenient to close the access port 411.

[0031] Reference Figure 4 The storage box 41 is provided with a second elastic element 416 for driving the cover plate 412 to flip away from the storage box 41. The second elastic element 416 includes a torsion spring, which is sleeved on the rotation shaft of the cover plate 412. One end of the torsion spring is fixedly connected to the storage box 41, and the other end of the torsion spring is fixedly connected to the cover plate 412. When the locking block 413 disengages from the locking groove 4121 of the cover plate 412, the cover plate 412 flips away from the storage box 41 under the elastic force of the torsion spring, thereby automatically opening the inspection port 411 for easy access to and removal of tools.

[0032] Reference Figure 5 The base 1 is provided with a first driving member 11 for driving each tool holder 3 to slide. The first driving member 11 includes a rodless cylinder, which is fixedly mounted on the base 1. The piston of the rodless cylinder is fixedly connected to the corresponding tool holder 3.

[0033] Reference Figure 5 The tool holder 3 is equipped with a tool changing mechanism, which includes a tool changing frame 31 rotatably mounted on the tool holder 3 and a tool taking frame 32 slidably mounted on the tool changing frame 31. The rotation axis of the tool changing frame 31 is vertical. At least two tool taking frames 32 are provided, and they are respectively located on both sides of the tool changing frame 31. The sliding direction of the tool taking frames 32 is vertical. The tool holder 3 is equipped with a third drive source 33 for driving the tool changing frame 31 to rotate. The third drive source 33 includes a third motor, which is fixedly mounted on the tool holder 3. The output shaft of the third motor is fixedly connected to the tool changing frame 31. The tool changing frame 31 is equipped with a second drive member 34 for driving each tool taking frame 32 to slide. The second drive member 34 includes a push cylinder, which is fixedly mounted on the tool changing frame 31 and is fixedly connected to the corresponding drive frame.

[0034] Reference Figure 5Both tool holders 32 are equipped with clamping mechanisms for clamping tools. Each clamping mechanism includes a first clamping sleeve 321, a second clamping sleeve 322, and a drive assembly. The first and second clamping sleeves 321 and 322 are hinged to the tool holders 32, forming a clamping area for holding the tool. The drive assembly includes a third elastic element 323, a sliding sleeve 324, and a third drive element 325. The third elastic element 323 includes a return spring. Between the first clamping sleeve 321 and the second clamping sleeve 322, and with both ends of the return spring fixedly connected to the first clamping sleeve 321 and the second clamping sleeve 322 respectively, the first clamping sleeve 321 and the second clamping sleeve 322 deflect in a direction away from each other under the elastic force of the return spring, and the sliding sleeve 324 is slidably sleeved on the first clamping sleeve 321 and the second clamping sleeve 322. The third driving member 325 includes a servo cylinder, which is fixedly mounted on the tool holder 32, and the piston rod of the servo cylinder is fixedly connected to the sliding sleeve 324.

[0035] The next set of tools to be replaced is moved to the tool outlet 21 position. Then, the storage rack 42 is rotated out of the storage box 41 by the second motor. At this time, the tools on the storage rack 42 are vertical. The spare tool holder 3 is moved to the shared tool magazine 2 position by the rodless cylinder. The tool changer 31 is rotated by the third motor, so that one of the tool pickers 32 on the tool changer 31 is moved to the tool outlet 21 position of the shared tool magazine 2. Then, the push cylinder drives the tool picker 32 to move upward, so that the tools on the storage rack 42 enter the clamping area between the first clamp 321 and the second clamp 322. Then, the sliding sleeve 324 is slid by the servo cylinder, which pushes the first clamp 321 and the second clamp 322 to deflect in a direction away from each other. The tools are clamped by the first clamp 321 and the second clamp 322. Finally, the tool picker 32 is driven to slide down, so that the tools can be removed from the storage rack 42.

[0036] The implementation principle of the tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center in this application embodiment is as follows: various tools used for machining are stored on the storage racks 42 on each tool holder 4 of the shared tool magazine 2. During the machining process of the workpiece, according to the tools required for the next machining process of the two spindles, the first motor drives the first gear plate 22 to rotate, which in turn drives the chain belt plate 24 to move each tool holder 4 along the circumference of the shared tool magazine 2. The tools that need to be replaced in the next set are moved to the corresponding tool outlet 21 positions of the two spare tool holders 3. Then, the second motor rotates the storage rack 42 out of the storage box 41.

[0037] The two spare tool holders 3 are moved to the shared tool magazine 2 by a rodless cylinder, and the tool changer 31 is rotated by a third motor, so that one of the tool pickers 32 on the tool changer 31 moves to the tool outlet 21 of the shared tool magazine 2. Then, the push cylinder drives the tool picker 32 to move upward, so that the tool on the storage rack 42 enters the clamping area between the first clamp 321 and the second clamp 322. Then, the sliding sleeve 324 is slid by a servo cylinder, which pushes the first clamp 321 and the second clamp 322 to deflect in a direction away from each other. The tool is clamped by the first clamp 321 and the second clamp 322. Finally, the tool picker 32 is driven to slide down, so that the tool can be removed from the storage rack 42, and the next set of replacement tools can be stored on the two spare tool holders 3.

[0038] When it is necessary to replace the tool on the spindle, the first drive unit 11 drives the corresponding tool holder 3 to move to the spindle position, and the third motor drives the tool changer 31 to rotate, so that the tool picker 32 on the tool changer 31 without a tool is connected to the tool on the spindle, thereby removing the tool from the spindle. Then, the tool changer 31 is driven to rotate again, and the tool originally stored on the tool changer 31 is connected to the spindle, thereby replacing the tool on the spindle with the tool stored on the tool holder 3, thus completing the tool change of the spindle. When changing tools on the two spindles of a dual-spindle machining center, the two tool holders 3 do not interfere with each other, and the tool to be replaced is stored in advance by the two tool holders 3, which greatly improves the tool changing efficiency of the dual-spindle machining center.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tool magazine structure for a dual-spindle high-speed and high-efficiency vertical machining center, characterized in that: The system includes a base (1) and a shared tool magazine (2) fixedly mounted on the base (1). Multiple tool holders (4) are slidably arranged in the shared tool magazine (2) along the circumference of the shared tool magazine (2). A transmission component for driving each tool holder (4) to slide is provided in the shared tool magazine (2). Each tool holder (4) is provided with a magnetic suction component (422) for fixing the tool. A tool outlet (21) is provided on the shared tool magazine (2). Two spare tool holders (3) are slidably arranged on the machine base (1). Each spare tool holder (3) corresponds to a spindle. The machine base (1) is provided with a first driving member (11) for driving each spare tool holder (3) to slide. Each spare tool holder (3) has a tool changing mechanism. A storage box (41) is fixedly installed on the tool holder (4), and a storage rack (42) is rotatably installed inside the storage box (41). A second drive source (43) for driving the storage rack (42) to rotate is provided on the tool holder (4). A sleeve (421) is fixedly installed on the storage rack (42), and the magnetic suction component (422) is used to fix the tool inside the sleeve (421). The tool changing mechanism includes a tool changing frame (31) rotatably mounted on the tool holder (3) and a tool taking frame (32) slidably mounted on the tool changing frame (31). At least two tool taking frames (32) are provided and are respectively located on both sides of the tool changing frame (31). The tool holder (3) is provided with a third drive source (33) for driving the tool changing frame (31) to rotate. The tool changing frame (31) is provided with a second drive member (34) for driving each of the tool taking frames (32) to slide. The tool taking frame (32) is provided with a clamping mechanism for clamping the tool. The clamping mechanism includes a first clamp (321), a second clamp (322), and a drive assembly. The first clamp (321) and the second clamp (322) are both hinged to the tool holder (32). A clamping area for clamping the tool is formed between the first clamp (321) and the second clamp (322). The drive assembly is used to drive the first clamp (321) and the second clamp (322) to deflect in a direction that moves closer to or further away from each other. The drive assembly includes a third elastic element (323), a sliding sleeve (324), and a third drive element (325). The third elastic element (323) is used to drive the first sleeve (321) and the second sleeve (322) to deflect in a direction away from each other. The sliding sleeve (324) is slidably sleeved on the first sleeve (321) and the second sleeve (322). The third drive element (325) is used to drive the sliding sleeve (324) to slide.

2. The tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center according to claim 1, characterized in that: The transmission assembly includes a first toothed disc (22), a second toothed disc (23), a chain belt plate (24), and a first drive source (25). The first toothed disc (22) and the second toothed disc (23) are rotatably disposed in the shared tool magazine (2). The chain belt plate (24) is wound around the first toothed disc (22) and the second toothed disc (23) and meshes with the first toothed disc (22) and the second toothed disc (23) respectively. The first drive source (25) is used to drive the first toothed disc (22) to rotate. Each of the tool holders (4) is fixedly connected to the chain belt plate (24).

3. The tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center according to claim 1, characterized in that: The storage box (41) has an inspection port (411) on its side wall, and a cover plate (412) is hinged to the inspection port (411). The storage box (41) is provided with a limiting component to prevent the cover plate (412) from rotating.

4. The tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center according to claim 3, characterized in that: The limiting component includes a locking block (413), a lever (414), and a first elastic element (415). The side wall of the inspection port (411) is provided with an installation groove. The locking block (413) is slidably disposed in the installation groove. The side wall of the storage box (41) is provided with a long groove communicating with the installation groove along the sliding direction of the locking block (413). The lever (414) is slidably disposed in the long groove and fixedly connected to the locking block (413). The first elastic element (415) is used to drive the locking block (413) to slide towards the cover plate (412). The cover plate (412) is provided with a locking groove (4121) for the locking block (413) to be inserted.

5. The tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center according to claim 4, characterized in that: The locking block (413) has a guide slope at one end near the cover plate (412), and the cover plate (412) is used to abut against the guide slope and drive the locking block (413) to slide away from the cover plate (412).

6. The tool magazine structure of a dual-spindle high-speed and high-efficiency vertical machining center according to claim 4, characterized in that: The storage box (41) is provided with a second elastic element (416) for driving the cover plate (412) to flip away from the storage box (41).

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