Tool changing system, CNC machine tool and tool changing method

Abstract

The present application provides a tool changing system, a CNC machine tool, and a tool changing method, wherein the tool changing system includes a disc tool magazine and a tool sleeve conveying mechanism, wherein the disc tool magazine includes a tool disc, a tool sleeve, and a tool sleeve holder, wherein the tool sleeves are distributed around the circumference of the tool disc via the tool sleeve holder; the tool sleeve conveying mechanism includes a mounting seat, a tool changer seat, and a pusher, wherein one end of the mounting seat is fixed above the tool disc, and the other end of the mounting seat is provided with a tool changer seat and extends outside the tool disc; the pusher is movably disposed on the mounting seat to push the tool sleeve to switch between a tool preparation position and a tool change position, wherein the tool change position is the position where the tool changer seat is located, and the tool preparation position is the position on the circumference of the tool disc opposite the tool changer seat; the mounting seat can rotate in a horizontal plane around the centerline of the tool disc, thereby switching between multiple rotational positions. The use of this tool changing system can reduce tool change time, improve processing efficiency, and reduce the manufacturing cost of CNC machine tools.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of machine tool technology, and in particular to a tool changing system, a CNC machine tool, and a tool changing method. Background Art

[0002] CNC machine tools feature a variety of tool magazines, including umbrella-type, circular, chain, and linear magazines. These magazines are mounted horizontally on CNC machines. Because flipping the tool pockets can interfere with other components, some CNC machines equipped with horizontal magazines currently require the spindle to move to the magazine's pocket location to retrieve the new tool. This involves multiple reciprocating spindle movements. This results in slow spindle movement and long travel distances, making tool changes time-consuming.

[0003] Furthermore, to improve machining efficiency, some CNC machine tools are equipped with multiple spindles. However, multiple spindles typically require multiple tool magazines, which significantly increases costs. Further exploration is needed to find a balance between improving machining efficiency and reducing machine tool manufacturing costs. Summary of the Invention

[0004] The embodiments of the present application aim to solve at least one of the existing technical problems. The embodiments of the present application provide a tool changing system, a CNC machine tool, and a tool changing method to reduce tool changing time, improve machining efficiency, and reduce manufacturing costs of CNC machine tools.

[0005] The relevant technical solutions of the embodiments of this application include the following:

[0006] A first aspect of an embodiment of the present application provides a tool changing system. The tool changing system includes a disc tool magazine, the disc tool magazine including a cutter disc, a tool sleeve, and a tool sleeve holder, the tool sleeves being distributed around the circumference of the cutter disc via the tool sleeve holder; the tool changing system further includes:

[0007] The tool sleeve conveying mechanism includes a mounting seat, a tool changing seat and a pushing member, one end of the mounting seat is fixed above the tool disc, and the other end of the mounting seat is provided with a tool changing seat and extends to the outside of the tool disc, and the pushing member is movably provided on the mounting seat to push the tool sleeve to switch between a tool preparation position and a tool changing position, wherein the tool changing position is the position of the tool changing seat, and the tool preparation position is the position on the circumference of the tool disc that is opposite to the tool changing seat; the mounting seat can rotate in a horizontal plane around the center line of the tool disc, thereby switching between multiple rotation positions.

[0008] Optionally, the disc tool magazine has a first rotating shaft and a first reducer, and the first reducer drives the tool disc to rotate through the first rotating shaft; the tool sleeve conveying mechanism has a second rotating shaft and a second reducer, and the second reducer drives the mounting seat to rotate through the second rotating shaft; the first rotating shaft, the second rotating shaft and the center line of the tool disc are coaxial.

[0009] Furthermore, a protrusion is provided on the side of the second rotating shaft, and a plurality of sensors are provided on the periphery of the second rotating shaft. The number of the sensors is the same as the number of the rotation positions and corresponds one to one. The sensors are used to detect whether the mounting seat reaches the corresponding rotation position.

[0010] Optionally, the tool sleeve seat has a first guide structure, the tool changing seat has a second guide structure, and the tool sleeve has a sliding structure that is compatible with both the first guide structure and the second guide structure, wherein the first guide structure and the second guide structure are guide protrusions, and the sliding structure is a sliding groove.

[0011] Furthermore, the first guide structure on at least one of the plurality of tool sleeve seats can be flush with the second guide structure and the distance between the two is smaller than the length of the sliding structure.

[0012] Optionally, the pushing member includes a first pushing portion and a second pushing portion that are arranged opposite to each other, wherein the space between the first pushing portion and the second pushing portion allows the cutter sleeves on the circumference of the cutter disc to pass through one by one.

[0013] Optionally, the tool changing system further comprises a plurality of tool changing mechanisms, each of the tool changing mechanisms being respectively arranged corresponding to one of the rotation positions, each of the tool changing mechanisms comprising a tool changing arm capable of rotating around its own center point, and each of the two ends of the tool changing arm comprising a clamping portion;

[0014] In the tool-changing state of one tool-changing arm, the clamping portion at one end of the tool-changing arm is located below one tool-changing seat; in the tool-changing state of the other tool-changing arm, the clamping portion at one end of the tool-changing arm is located below the other tool-changing seat.

[0015] A second aspect of the embodiments of the present application provides a CNC machine tool. The CNC machine tool includes multiple spindles, a tool changing system according to any of the aforementioned embodiments, and a control system, wherein the control system is configured to control the movement of the tool changing system and the multiple spindles, and the tool changing system is configured to provide tools for the multiple spindles.

[0016] Optionally, the CNC machine tool includes a plurality of machine tool bodies, each of which includes a spindle box, a crossbeam, a bed and a cradle turntable;

[0017] The bed includes a base and two side plates arranged on both sides of the base, the pushing direction of the tool sleeve is parallel to the extending direction of the side plates, the crossbeam is mounted on the two side plates, the spindle box is mounted on the crossbeam, the spindle is mounted on the spindle box, and the cradle turntable is arranged on the bed and located below the spindle box;

[0018] The disc tool magazine is located below the crossbeam and at least partially in the space defined by the multiple crossbeams in the horizontal direction. The spindle boxes of the multiple machine tool bodies are respectively installed on the sides of the multiple crossbeams that are away from each other.

[0019] A third aspect of the embodiments of the present application provides a tool changing method for a CNC machine tool. The tool changing method for a CNC machine tool is applied to a CNC machine tool in any of the aforementioned embodiments, and the tool changing system of the CNC machine tool includes a plurality of tool changing mechanisms, each of which includes a tool changing arm that can rotate around its own center point, each of which has a clamping portion at both ends, and the plurality of tool changing mechanisms, the plurality of spindles, and the plurality of rotational positions correspond one to one. The tool changing method for a CNC machine tool includes:

[0020] Based on the spindle information of the tool to be changed specified by the control instruction, the tool sleeve conveying mechanism rotates to the rotation position corresponding to the spindle;

[0021] Rotate the cutter disc so that the tool holder where the target tool is located is located at the tool preparation position;

[0022] The tool sleeve conveying mechanism pushes the target tool together with the tool sleeve to the tool changing position, and the spindle on which the tool to be unloaded is installed moves in a direction close to the tool changing arm;

[0023] The two ends of the tool changing arm respectively clamp the target tool and the tool to be unloaded, and the tool changing arm descends a certain distance and rotates 180 degrees around its own center point, so that the target tool is separated from the tool holder and the empty tool holder is left in the tool changing seat, and the positions of the target tool and the tool to be unloaded are exchanged;

[0024] The tool changing arm rises and returns to its original height, the target tool is mounted on the spindle, and the tool to be unloaded is mounted in the tool sleeve of the tool changing seat;

[0025] The tool sleeve conveying mechanism pushes the tool to be unloaded together with the tool sleeve back to the cutter disc, and the spindle returns.

[0026] The technical solution for the tool changing system in the embodiment of the present application has at least the following technical effects: the tool changing system includes a tool sleeve conveying mechanism, and the tool sleeve conveying mechanism has a pushing member, which can push the tool sleeve to switch between the tool preparation position and the tool changing position. In the traditional technical solution, the spindle needs to move to the position of the tool sleeve on the tool magazine to obtain a new tool. In comparison, the technical solution of the embodiment of the present application reduces the movement distance of the spindle during the tool changing process, thereby reducing the tool changing time. In addition, the tool sleeve conveying mechanism can switch between multiple rotational positions, so that a tool sleeve conveying mechanism can push the tool sleeve to the tool changing position corresponding to different tool changing mechanisms, thereby realizing a disc tool magazine with multiple tool changing mechanisms to change tools for multiple spindles, while improving processing efficiency and reducing the manufacturing cost of CNC machine tools.

[0027] It is not difficult to understand that the relevant technical solutions of the CNC machine tool and the tool changing method of the CNC machine tool in the embodiment of the present application at least have the corresponding technical effects of the technical solution of the tool changing system, and will not be repeated here.

[0028] Additional aspects and advantages of the embodiments of the present application will be partially given in the following description, and in part will become apparent from the following description or be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1( a ) is a schematic diagram of a tool changing system in state (1) in some embodiments of the present application;

[0030] FIG1( b ) is a schematic diagram of the tool changing system in state (two) in some embodiments of the present application;

[0031] Figure 2 This is a simplified schematic diagram of a tool changing system in some embodiments of the present application;

[0032] Figure 3 Schematic diagram of the structure of the disc tool magazine (the tool sleeve and tool sleeve seat are omitted) in some embodiments of the present application;

[0033] Figure 4 Schematic diagram of the structure of the tool sleeve conveying mechanism in some embodiments of the present application;

[0034] Figure 5 for Figure 3 A local magnified view of area B in FIG;

[0035] Figure 6 Schematic diagram of the structure of the tool sleeve and the tool sleeve seat in some embodiments of the present application;

[0036] Figure 7 This is a schematic structural diagram of a tool changer and a buffer in some embodiments of the present application;

[0037] Figure 8It is a partial enlarged view of area A in Figure 1;

[0038] Figure 9 Schematic diagram of the structure of the pushing portion in some embodiments of the present application;

[0039] Figure 10 Schematic diagram of the structure of the tool changing mechanism in some embodiments of the present application;

[0040] Figure 11 This is a schematic diagram of the main structure of the CNC machine tool in some embodiments of the present application.

[0041] In the picture:

[0042] 10 - disc tool magazine; 110 - tool disk; 1110 - disk body, 1120 - support structure, 1121 - support ribs, 1130 - tool disk seat, 1140 - first rotating shaft, 1141 - first reducer; 120 - tool sleeve, 130 - tool sleeve seat, 1310 - first guide structure, 1311 - guide portion; 140 - tool magazine mounting seat; 1410 - tool magazine base plate, 1420 - tool disk connecting plate;

[0043] 20- tool changing mechanism; 210- tool changing arm, 2110- clamping part, 220- third reducer.

[0044] 30 - Tool sleeve conveying mechanism; 310 - Pushing member, 3110 - First pushing portion, 3120 - Second pushing portion, 3130 - Pushing portion base, 3140 - Kidney-shaped hole; 320 - Driving member; 330 - Mounting seat, 3310 - Mounting seat body, 3320 - Mounting plate, 3330 - Second rotating shaft, 3331 - Second reducer, 3332 - Protrusion, 3340 - Sensor; 340 - Buffer; 350 - Tool changer, 3501 - Accommodating space, 3510 - Second guide structure, 3511 - Guide portion;

[0045] 40-tool; 50-spindle box; 60-crossbeam; 70-bed, 710-base, 720-side plate, 721-mounting slot. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments of the present application or the description of the prior art.

[0047] Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, without making any creative efforts, they can also obtain drawings of other embodiments based on the technical solutions shown in these drawings.

[0048] It should be understood that the term "plurality" as used herein refers to two or more. In the description of this application, unless otherwise specified, " / " represents or, for example, "A / B" represents A or B. "and / or" as used herein is merely a way of describing an association between related objects, and it can represent three possible relationships. For example, "A and / or B" can represent: A alone, A and B simultaneously, or B alone.

[0049] In addition, to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, expressions such as "first" or "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that expressions such as "first" and "second" do not limit the quantity or execution order, and that expressions such as "first" and "second" do not necessarily mean that they are different.

[0050] The "installation", "connection" and "setting" mentioned in the embodiments of the present application include direct installation / connection / setting, as well as indirect installation / connection / setting; include detachable installation / connection / setting, as well as non-detachable installation / connection / setting; include fixed installation / connection / setting, as well as movable installation / connection / setting.

[0051] See also Figures 1(a) to 10 In a first aspect of an embodiment of the present application, a tool changing system is provided. The tool changing system includes a disc tool magazine 10 and a tool sleeve conveying mechanism 30 .

[0052] As shown in Figure 1(a), Figure 1(b), Figure 3 as well as Figure 6 As shown, the disc tool magazine 10 includes a cutter disc 110, a cutter sleeve 120 and a cutter sleeve seat 130, and the cutter sleeve 120 is distributed on the circumference of the cutter disc 110 through the cutter sleeve seat 130. Figure 4As shown, the tool sleeve conveying mechanism 30 includes a mounting seat 330, a tool change seat 350, and a pusher 310. One end of the mounting seat 330 is fixed above the cutter disc 110, and the tool change seat 350 is disposed at the other end of the mounting seat 330 and extends outside the cutter disc 110. The pusher 310 is movably mounted on the mounting seat 330 to push the tool sleeve 120 between a tool preparation position and a tool change position. The tool change position is where the tool change seat 350 is located, and the tool preparation position is the position on the circumference of the cutter disc 110 directly opposite the tool change seat 350. The mounting seat 330 can rotate in a horizontal plane about the centerline of the cutter disc 110, thereby switching between multiple rotational positions. Different rotational positions correspond to different states of the tool sleeve conveying mechanism 30. Figures 1(a) and 1(b) illustrate two states of the tool sleeve conveying mechanism 30. The mounting seat 330 of the tool sleeve conveying mechanism 30 rotates 180° from state (I) shown in Figure 1(a) to state (II) shown in Figure 1(b). It is understood that the mounting base 330 can also be switched between three or even more rotational positions. Figure 2 The mounting base 330 is shown switching between three rotational positions. It should be noted that the angles between two adjacent rotational positions can be unequal. For example, the angle between the first and second rotational positions is 108°, the angle between the second and third rotational positions is 144°, and the angle between the third and first rotational positions is 108°. The number and location of the mounting base 330 of the tool holder conveying mechanism 30 can be adaptively determined based on the actual location of the multiple tool changing mechanisms used in conjunction with the tool holder conveying mechanism 30.

[0053] In an embodiment of the present application, the tool changing system includes a tool sleeve conveying mechanism 30, and the tool sleeve conveying mechanism 30 has a pushing member 310, and the pushing member 310 can push the tool sleeve 120 to switch between the tool preparation position and the tool changing position. In the traditional technical solution, the spindle needs to move to the position of the tool sleeve on the tool magazine to obtain a new tool. In comparison, the technical solution of the embodiment of the present application reduces the movement distance of the spindle during the tool changing process, thereby improving the tool changing efficiency. In addition, the tool sleeve conveying mechanism 30 can switch between multiple rotational positions, so that one tool sleeve conveying mechanism 30 can push the tool sleeve 120 to the tool changing position corresponding to different tool changing mechanisms 20, thereby realizing a disc tool magazine 10 with multiple tool changing mechanisms 20 to change tools for multiple spindles, saving space in the machine tool and reducing manufacturing costs.

[0054] Specifically, in FIG. 1(a), FIG. 1(b), Figure 2 as well as Figure 3In the figure, a plurality of tool sleeve seats 130 are evenly distributed around the circumference of the cutter disc 110, and a tool sleeve 120 is provided on each tool sleeve seat 130. Each tool sleeve 120 can store a tool 40. The cutter disc 110 includes a disc body 1110, a support structure 1120, and a cutter disc seat 1130. The disc body 1110 and the cutter disc seat 1130 are connected via the support structure 1120. The support structure 1120 includes a plurality of support ribs 1121. The support ribs 1121 extend vertically upward from the outer edge of the cutter disc seat 1130 and then continue to extend upward to the outer edge of the disc body 1110 in an inclined upward and outward divergent manner. The support ribs 1121 extend vertically upward and then extend obliquely upward and outward divergently, which can save the area occupied by the entire disc tool magazine 10 within the height range of the vertical upward extension. Weight reduction holes are provided on the support ribs 1121. Reinforcement ribs are provided on both sides of each supporting rib 1121 , and the reinforcement ribs extend from the supporting rib 1121 to the disk body 1110 to further improve the structural strength of the supporting structure 1120 .

[0055] exist Figure 3 In the embodiment, the disc tool magazine 10 further includes a tool magazine mounting seat 140. The tool magazine mounting seat 140 further includes a tool magazine mounting seat body, a tool magazine base plate 1410 and a cutter disc connecting plate 1420. The cutter disc connecting plate 1420 is located directly below the cutter disc seat 1130 and the cutter disc connecting plate 1420 and the cutter disc seat 1130 are rotatably connected. The cutter disc connecting plate 1420 and the tool magazine base plate 1410 are respectively arranged at the top and bottom of the tool magazine mounting seat body. There is an escape space between the cutter disc connecting plate 1420 and the tool magazine base plate 1410 (i.e., the side of the tool magazine mounting seat body). The escape space accommodates a first reducer 1141 for driving the cutter disc 110 to rotate.

[0056] As shown in Figure 1(a), Figure 1(b), Figure 3 as well as Figure 4 As shown, the mounting base 330 of the tool sleeve conveying mechanism 30 includes a mounting base body 3310 and a mounting plate 3320. One end of the mounting base body 3310 is mounted above the central area of ​​the cutter disc 110 via the mounting plate 3320, while the other end extends radially outward from the cutter disc 110 and is provided with a tool changer 350. The central area of ​​the cutter disc 110 is recessed downward, and the bottom of the mounting base body 3310 rises in a stepped manner from the mounting plate 3320 to the tool changer 350. This places the center of gravity of the mounting base body 3310 relatively close to the central area of ​​the cutter disc 110, making the entire mounting base body 3310 more securely mounted.

[0057] like Figure 4As shown, the tool sleeve conveying mechanism 30 also includes a driving member 320 and a buffer 340 with a buffer head. The fixed end of the driving member 320 is connected to the mounting seat 330, and the output end of the driving member 320 is connected to the pushing member 310. The driving member 320 includes a cylinder, a hydraulic cylinder or a motor. The pushing member 310 is located between the two ends of the mounting seat 330 and can move relative to the mounting seat 330. The tool changer 350 has an accommodating space 3501 inside (please refer to the Figure 7 ), the location of the accommodating space 3501 is the tool change position, which is used to temporarily accommodate the tool holder 120 pushed to the tool change position. The buffer 340 is mounted on the tool changer 350, with the buffer head located directly in the direction of the tool holder's ejection. The provision of the buffer 340 helps reduce the impact and noise caused by the drive member 320.

[0058] See also Figure 3 In some embodiments of the present application, the disc tool magazine 10 optionally includes a first rotating shaft 1140 and a first reducer 1141. The first reducer 1141 drives the cutter disc 110 to rotate via the first rotating shaft 1140. The tool sleeve conveying mechanism 30 includes a second rotating shaft 3330 and a second reducer 3331. The second reducer 3331 drives the mounting base 330 to rotate via the second rotating shaft 3330. The centerlines of the first rotating shaft 1140, the second rotating shaft 3330, and the cutter disc 110 are coaxial. The first rotating shaft 1140 and the second rotating shaft 3330 are driven by different drive mechanisms, respectively, so that both the cutter disc 110 and the tool sleeve conveying mechanism 30 can rotate, and the tool sleeve conveying mechanism 30 can rotate relative to the cutter disc 110. The first reducer 1141 or the second reducer 3331 can be used in conjunction with a motor, or a motor-reducer integrated structure can be used. The motor used in conjunction or in an integrated structure can be a servo motor with relatively accurate speed and position control accuracy.

[0059] See also Figure 5In some embodiments of the present application, a protrusion 3332 is further provided on the side of the second rotating shaft 3330. Multiple sensors 3340 are disposed on the periphery of the second rotating shaft 3330. The number of sensors 3340 corresponds to the number of rotational positions and corresponds one-to-one. The sensors 3340 are used to detect whether the mounting seat 330 has reached the corresponding rotational position. Although some current drive mechanisms, including servo motors, can relatively accurately control the rotation of the mounting seat 330 of the tool sleeve conveying mechanism 30 to a specific rotational position, to further improve the accuracy of the tool sleeve conveying mechanism 30 reaching the rotational position, multiple sensors 3340 are used to detect and confirm whether the mounting seat 330 has reached the specified rotational position. For example, the sensor 3340 can be a position sensor, with the protrusion 3332 serving as a feature point. When the rotating protrusion 3332 is detected within the detection range of the position sensor, either non-contact or contact-based, it is confirmed that the mounting seat 330 has reached the rotational position corresponding to the sensor 3340. The sensor 3340 can also be a visual detection system, with the protrusion 3332 serving as a feature point. When the rotating protrusion 3332 is detected by a certain sensor 3340 , it can be confirmed that the mounting base 330 has reached the rotation position corresponding to the sensor 3340 .

[0060] Optionally, in some embodiments of the present application, Figure 6 as well as Figure 7 As shown, the tool holder seat 130 has a first guide structure 1310, the tool change seat 350 has a second guide structure 3510, and the tool holder 120 has a sliding structure that mates with both the first and second guide structures 1310 and 3510. The first and second guide structures 1310 and 3510 are guide protrusions, while the sliding structure is a sliding groove. The first guide structure 1310 is in the tool preparation position, while the second guide structure 3510 is in the tool change position. In normal operation, the tool holder 120 is positioned on the tool holder seat 130 by the first guide structure 1310. During tool changes, the pusher 310 pushes the tool holder 120 between the first and second guide structures 1310 and 3510. By cooperating with the sliding structure and the two guide structures, the tool holder 120 can be pushed without the risk of it falling out, even when the clamping jaws are not clamping it. The tool holder 120 does not need to wait for the clamping jaws to secure it before being ejected.

[0061] Furthermore, in some embodiments of the present application, Figure 8As shown, the first guide structure 1310 on at least one of the multiple tool holder holders 130 is flush with the second guide structure 3510 (i.e., the first guide structure 1310 on the tool holder holder 130 at the tool change position of the cutter disc 110 is flush with the second guide structure 3510 on the tool changer 350), and the distance between the two is less than the length of the sliding structure. "Flush" means that the two are flush in both height and in a horizontal direction perpendicular to the direction in which the tool holder 120 is pushed out. The flushness of the two guide structures allows the sliding structure of the tool holder 120 to smoothly engage with the other guide structure after releasing the engagement with one guide structure without adjustment. The distance between the two guide structures that are flush with each other is smaller than the length of the sliding structure, so that the sliding structure on the knife sleeve 120 can immediately enter into a new guiding cooperation relationship with the second guide structure 3510 / first guide structure 1310 before it is out of the guiding cooperation with the first guide structure 1310 / second guide structure 3510, so that the knife sleeve 120 will not fall when it is pushed through the space between the two guide structures.

[0062] Furthermore, in some embodiments of the present application, Figure 8 As shown, the first guide structure 1310 and the second guide structure 3510 are respectively provided with a guide portion 1311 and a guide portion 3511 at their protruding ends. The sliding structure on the knife sleeve 120 includes a groove structure, and the first guide structure 1310 and the second guide structure 3510 can be inserted into the sliding structure. The cross-sections of the guide portion 1311 of the first guide structure 1310 and the guide portion 3511 of the second guide structure 3510 gradually decrease along their extension direction. The cooperation between the guide portion and the sliding structure is similar to the cooperation between the slider and the groove. The size relationship between the two is configured so that a relatively small slider cooperates with a relatively large groove, thereby guiding a slider-like structure into a groove-like structure.

[0063] Optionally, in some embodiments of the present application, Figure 9 As shown, the pushing member 310 includes a first pushing portion 3110 and a second pushing portion 3120 that are relatively arranged, wherein the space between the first pushing portion 3110 and the second pushing portion 3120 allows the circumferential tool sleeves 120 of the cutter disc 110 to pass through one by one, so that when the two pushing portions do not move or rotate, the tool sleeve 120 where the target tool is located can come into the space defined by the two pushing portions as the cutter disc 110 rotates.

[0064] Specifically, the first pushing portion 3110 can be used to push the tool sleeve 120 from the tool sleeve seat 130 of the disc tool magazine 10 to the position of the tool change seat 350, while the second pushing portion 3120 is used to push the tool sleeve 120 from the position of the tool change seat 350 back to the tool sleeve seat 130. The first pushing portion 3110 and the second pushing portion 3120 are spaced apart in the direction of pushing out the tool sleeve 120, and the second pushing portion 3120 is located directly in front of the first pushing portion 3110 in the direction of pushing out the tool sleeve 120. The space defined by the first pushing portion 3110 and the second pushing portion 3120 allows one tool sleeve 120 to pass through. Figure 9 As shown, the pusher 310 further includes a pusher base 3130, which is mounted between the ends of the mounting base 330 and is movable relative to the mounting base 330. A first pusher 3110 and a second pusher 3120 extend downward from the pusher base 3130. The pusher base 3130 can move to a position close to the tool changer 350, meaning that the pusher can push the tool holder 120 as far as the tool changer 350. The first guide structure 1310 on the tool holder holder 130 at the tool change position of the cutter disc 110 and the second guide structure 3510 on the tool changer 350 extend in the same direction. The pusher base 3130 is provided with a waist-shaped hole 3140. At least one of the first pusher 3110 and the second pusher 3120 is connected to the pusher base 3130 via a threaded fastener engaging the waist-shaped hole 3140. The length of the waist-shaped hole 3140 is parallel to the direction from the first pusher 3110 to the second pusher 3120. The waist-shaped hole 3140 can increase or decrease the distance between the first pusher 3110 and the second pusher 3120 in the direction of pushing out the knife sleeve 120, thereby accommodating knife sleeves 120 of different sizes.

[0065] In some embodiments of the present application, Figure 10 As shown, optionally, the tool changing system further includes a plurality of tool changing mechanisms 20, each tool changing mechanism 20 is respectively arranged corresponding to a rotation position, each tool changing mechanism 20 has a tool changing arm 210 that can rotate around its own center point, and each tool changing arm 210 has a clamping portion 2110 at both ends; in the tool changing state of one tool changing arm 210, the clamping portion 2110 at one end of the tool changing arm 210 is located below one tool changing seat 350; in the tool changing state of another tool changing arm 210, the clamping portion 2110 at one end of the tool changing arm 210 is located below another tool changing seat 350. Specifically, Figure 10 It is also shown that a third reducer 220 is installed below the tool changing arm 210 to drive the tool changing arm 210 to rotate.

[0066] A second aspect of the embodiments of the present application provides a CNC machine tool. The CNC machine tool includes multiple spindles, a tool changing system as described in any of the aforementioned embodiments, and a control system, wherein the control system is used to control the operation of the tool changing system and the multiple spindles. The tool changing system is used to provide tools 40 for the multiple spindles, so that a single disc tool magazine 10 can be used in conjunction with multiple tool changing mechanisms 20 to change tools for the multiple spindles.

[0067] Please combine Figure 11 In some embodiments of the present application, optionally, the CNC machine tool includes a plurality of machine tool bodies, each of which includes a spindle box 50, a crossbeam 60, a bed 70 and a cradle turntable; the bed 70 includes a base 710 and two side plates 720 arranged on both sides of the base 710, the push-out direction of the tool sleeve 120 is parallel to the extension direction of the side plates 720, the crossbeam 60 is mounted on the two side plates 720, the spindle box 50 is mounted on the crossbeam 60, the spindle is mounted on the spindle box 50, and the cradle turntable is arranged on the bed 70 and located below the spindle box 50; the disc tool magazine 10 is located below the crossbeam 60 and is at least partially located in the space defined by the multiple crossbeams 60 in the horizontal direction, and the spindle boxes 50 of the multiple machine tool bodies are respectively installed on the sides of the multiple crossbeams 60 that are away from each other. It should be pointed out that Figure 11 The case where the number of machine tool bodies is two is shown, but the CNC machine tool in the embodiment of the present application may include three or even more machine tool bodies.

[0068] Since the extension direction of the side panels 720 is parallel to the tool sleeve ejection direction, the angle between the extension directions of the adjacent side panels 720 of the two machine tool bodies can also be adjusted according to the actual layout of the entire CNC machine tool, thereby reducing the floor space.

[0069] Furthermore, there are two machine tool bodies, and the included angle between the extension directions of the adjacent side panels 720 of the two machine tool bodies is between 120° and 180°. Figure 11 The included angle between the extending directions of the adjacent side panels 720 of the two machine tool bodies is 180°.

[0070] Specifically, Figure 11The X-axis and Y-axis directions are shown, while the Z-axis direction, not shown, is perpendicular to both the X-axis and Y-axis directions. The side panels 720 extend in the Y-axis direction, and the crossbeam 60 extends in the X-axis direction. The crossbeam 60 is mounted on the side panels 720 and is movable relative to the side panels 720 in the Y-axis direction. From the Z-axis direction, the disc tool magazine 10 is located below the crossbeam 60; from the Y-axis direction, the disc tool magazine 10 is also at least partially located between the two crossbeams 60. From the Y-axis direction, there is a tool changing mechanism 20 on each side of the outside of the disc tool magazine 10. From the Y-axis direction, there is a tool sleeve conveying mechanism 30 between the center line of the disc tool magazine 10 and the tool changing mechanisms 20 on both sides. There is a spindle box 50 on each side of the two crossbeams 60 facing away from each other.

[0071] For further information, please refer to Figure 11 In some embodiments of the present application, each side plate 720 is provided with a mounting slot 721 at one end away from the disc tool magazine 10. The mounting slot 721 has an arc-shaped surface, and the opening of the mounting slot 721 faces away from the disc tool magazine 10. The rotating shaft of the cradle turntable is mounted on the side plate 720 through the mounting slot 721. Compared with the traditional cradle turntable rotating shaft installation method, the use of an open mounting slot for installing the rotating shaft is more convenient.

[0072] On the basis of the aforementioned embodiments, the third aspect of the embodiments of the present application provides a tool changing method for a CNC machine tool. The tool changing method for a CNC machine tool is applied to the CNC machine tool described in any embodiment of the aforementioned second aspect. The tool changing system of the CNC machine tool includes a plurality of tool changing mechanisms 20, and the tool changing mechanism 20 includes a tool changing arm 210 that can rotate around its own center point. The two ends of the tool changing arm 210 have a clamping portion 2110. The plurality of tool changing mechanisms 20, the plurality of spindles, and the plurality of rotation positions correspond one to one. The tool changing method for the CNC machine tool includes steps S110 to S160:

[0073] Step S110 : Based on the spindle information of the tool to be changed specified by the control instruction, the tool holder conveying mechanism 30 rotates to the rotation position corresponding to the spindle.

[0074] Step S120: Rotate the cutter head 110 so that the tool holder 120 where the target tool is located is located at the tool preparation position.

[0075] Step S130 : the tool holder conveying mechanism 30 pushes the target tool together with the tool holder 120 to the tool changing position, and the spindle on which the tool to be unloaded is installed moves toward the tool changing arm 210 .

[0076] It is understandable that the target tool is pushed into the accommodating space 3501 of the tool changer 350 (i.e., the tool sleeve is pushed out) and the spindle moves to the tool change position at the other end of the tool changer arm 210 (i.e., the spindle moves) can both be performed simultaneously, or one after the other: the tool sleeve is pushed out first, or the spindle moves first. In the case where the spindle moves first, the order of time may be the spindle movement, the tool disc rotation, and the tool sleeve is pushed out, or the tool disc rotation, the spindle movement, and the tool sleeve is pushed out, or the spindle movement and the tool disc rotation are performed simultaneously, and then the tool sleeve is pushed out. In other words, the spindle movement precedes the tool sleeve push-out and the tool disc rotation precedes the tool sleeve push-out. The spindle movement and the tool disc rotation can both be performed simultaneously or one after the other. In the case where the tool sleeve is pushed out first, the order of time may be the tool disc rotation, the tool sleeve push-out, and the spindle movement.

[0077] Step S140: The two ends of the tool changing arm 210 respectively clamp the target tool and the tool to be unloaded. The tool changing arm 210 descends a certain distance and rotates 180° around its own center point, so that the target tool is separated from the tool holder 120 and the empty tool holder 120 is left in the tool changing seat 350, and the positions of the target tool and the tool to be unloaded are exchanged.

[0078] Step S150: The tool changer arm 210 rises and returns to its original height, the target tool is mounted on the spindle, and the tool to be unloaded is mounted in the tool holder 120 of the tool changer 350. Similarly, the unloaded tool enters the receiving space of the tool changer and the target tool is mounted on the spindle, both of which can be performed simultaneously or one after the other.

[0079] Step S160: The tool holder conveying mechanism 30 pushes the unloaded tool together with the tool holder 120 back to the cutter head 110, and the spindle returns. Similarly, the tool holder returns to the cutter head and the spindle returns, and the two can be performed simultaneously or one after the other.

[0080] It is understandable that the above steps and the different actions in each step can be performed simultaneously or sequentially, provided that they are practical and feasible.

[0081] The above tool changing method greatly reduces the moving distance of the spindle, thereby reducing the tool changing time. In addition, the above tool changing method uses a disc tool magazine 10 with multiple tool changing mechanisms 20 to change tools for multiple spindles, which improves processing efficiency and reduces the manufacturing cost of CNC machine tools.

[0082] The above examples are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope of the present application.

Claims

1. A tool changing system, comprising a disc tool magazine, wherein the disc tool magazine comprises a tool disc, a tool sleeve and a tool sleeve seat, wherein the tool sleeves are distributed on the circumference of the tool disc through the tool sleeve seat, and wherein: The tool changing system further comprises: The tool sleeve conveying mechanism includes a mounting seat, a tool changing seat, and a pushing member, wherein one end of the mounting seat is fixed above the tool disc, and the other end of the mounting seat is provided with a tool changing seat and extends to the outside of the tool disc, and the pushing member is movably provided on the mounting seat to push the tool sleeve to switch between a tool preparation position and a tool changing position, wherein the tool changing position is the position where the tool changing seat is located, and the tool preparation position is the position on the circumference of the tool disc that is opposite to the tool changing seat; the mounting seat can rotate in a horizontal plane around the center line of the tool disc, thereby switching between a plurality of rotation positions; The pushing member includes a first pushing portion and a second pushing portion that are arranged opposite to each other, wherein the space between the first pushing portion and the second pushing portion allows the cutter sleeves on the circumference of the cutter disc to pass through one by one.

2. The tool changing system according to claim 1, characterized in that: The disc tool magazine has a first rotating shaft and a first reducer, and the first reducer drives the tool disc to rotate through the first rotating shaft; the tool sleeve conveying mechanism has a second rotating shaft and a second reducer, and the second reducer drives the mounting seat to rotate through the second rotating shaft; the first rotating shaft, the second rotating shaft and the center line of the tool disc are coaxial.

3. The tool changing system according to claim 2, characterized in that: A protrusion is provided on the side of the second rotating shaft, and a plurality of sensors are provided on the periphery of the second rotating shaft. The number of the sensors is the same as the number of the rotation positions and corresponds one to one. The sensors are used to detect whether the mounting seat reaches the corresponding rotation position.

4. The tool changing system according to claim 1, characterized in that: The tool sleeve seat has a first guide structure, the tool change seat has a second guide structure, and the tool sleeve has a sliding structure that is compatible with the first guide structure and the second guide structure, wherein the first guide structure and the second guide structure are guide protrusions, and the sliding structure is a sliding groove.

5. The tool changing system according to claim 4, characterized in that: The first guide structure on at least one of the plurality of tool sleeve seats can be flush with the second guide structure, and a distance between the first guide structure and the second guide structure is smaller than a length of the sliding structure.

6. The tool changing system according to any one of claims 1 to 5, characterized in that: The tool changing system further comprises a plurality of tool changing mechanisms, each of the tool changing mechanisms being respectively arranged corresponding to one of the rotation positions, each of the tool changing mechanisms comprising a tool changing arm capable of rotating around its own center point, and each of the two ends of the tool changing arm comprising a clamping portion; In the tool-changing state of one tool-changing arm, the clamping portion at one end of the tool-changing arm is located below one tool-changing seat; in the tool-changing state of the other tool-changing arm, the clamping portion at one end of the tool-changing arm is located below the other tool-changing seat.

7. CNC machine tool, characterized in that, It comprises a plurality of spindles, a tool changing system as claimed in any one of claims 1 to 6, and a control system, wherein the control system is used to control the actions of the tool changing system and the plurality of spindles, and the tool changing system is used to provide tools for the plurality of spindles.

8. The CNC machine tool according to claim 7, characterized in that: It includes multiple machine tool bodies, each of which includes a spindle box, a crossbeam, a bed and a cradle turntable; The bed includes a base and two side plates arranged on both sides of the base, the pushing direction of the tool sleeve is parallel to the extending direction of the side plates, the crossbeam is mounted on the two side plates, the spindle box is mounted on the crossbeam, the spindle is mounted on the spindle box, and the cradle turntable is arranged on the bed and located below the spindle box; The disc tool magazine is located below the crossbeam and at least partially in the space defined by the multiple crossbeams in the horizontal direction. The spindle boxes of the multiple machine tool bodies are respectively installed on the sides of the multiple crossbeams that are away from each other.

9. A tool changing method for a CNC machine tool, characterized in that: The tool changing method of the CNC machine tool according to claim 7 or 8 is applied to the CNC machine tool, wherein the tool changing system of the CNC machine tool includes a plurality of tool changing mechanisms, the tool changing mechanisms include a tool changing arm that can rotate around its own center point, and the two ends of the tool changing arm have a clamping portion, the plurality of tool changing mechanisms, the plurality of spindles, and the plurality of rotation positions correspond one to one, and the tool changing method of the CNC machine tool includes: Based on the spindle information of the tool to be changed specified by the control instruction, the tool sleeve conveying mechanism rotates to the rotation position corresponding to the spindle; Rotate the cutter disc so that the tool holder where the target tool is located is located at the tool preparation position; The tool sleeve conveying mechanism pushes the target tool together with the tool sleeve to the tool changing position, and the spindle on which the tool to be unloaded is installed moves in a direction close to the tool changing arm; The two ends of the tool changing arm respectively clamp the target tool and the tool to be unloaded, and the tool changing arm descends a certain distance and rotates 180 degrees around its own center point, so that the target tool is separated from the tool holder and the empty tool holder is left in the tool changing seat, and the positions of the target tool and the tool to be unloaded are exchanged; The tool changing arm rises and returns to its original height, the target tool is mounted on the spindle, and the tool to be unloaded is mounted in the tool sleeve of the tool changing seat; The tool sleeve conveying mechanism pushes the tool to be unloaded together with the tool sleeve back to the cutter disc, and the spindle returns.

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