Tool changing system, numerical control machine tool and tool changing method

Abstract

The invention provides a tool changing system, a numerical control machine tool and a tool changing method.The tool changing system comprises a disc tool magazine and a tool pouch conveying mechanism, the disc tool magazine comprises a tool disc, tool pouches and tool pouch bases, and the tool pouches are distributed on the circumference of the tool disc through the tool pouch bases; the cutter sleeve conveying mechanism comprises a mounting seat, a cutter changing seat and a pushing part, one end of the mounting seat is fixed above the cutter head, the other end of the mounting seat is provided with the cutter changing seat and extends out of the cutter head, and the pushing part is movably arranged on the mounting seat to push the cutter sleeve to be switched between the cutter preparation position and the cutter changing position; wherein the tool changing position is the position where the tool changing seat is located, and the tool preparing position is the position, right opposite to the tool changing seat, on the circumference of the tool disc; and the mounting seat can rotate in a horizontal plane around the center line of the cutter head, so that the mounting seat can be switched among a plurality of rotating positions. By the adoption of the tool changing system, the tool changing time can be shortened, the machining efficiency is improved, and meanwhile the manufacturing cost of the numerical control machine tool is reduced.

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] There are many types of tool magazines for CNC machine tools, such as umbrella tool magazines, disc tool magazines, chain tool magazines or straight tool magazines. When these tool magazines are installed horizontally on CNC machine tools, the tool magazine tool holder may interfere with other parts after flipping. Therefore, the tool change of some CNC machine tools equipped with horizontal tool magazines is to move the spindle to the position of the tool holder on the tool magazine to obtain a new tool, that is, the whole process is completed by multiple back and forth movements of the spindle. The spindle moves slowly and the moving distance is long, so the tool change process takes a long time.

[0003] In addition, in order to improve processing efficiency, some CNC machine tools are equipped with multiple spindles. However, multiple spindles usually mean that multiple tool magazines are required, which increases costs dramatically. How to balance between improving processing efficiency and reducing machine tool manufacturing costs requires further exploration. 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 the tool changing time and reduce the manufacturing cost of the CNC machine tool while improving the processing efficiency.

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

[0006] The first aspect of the embodiment of the present application provides a tool changing system. The tool changing system includes a disc tool magazine, the disc tool magazine includes a tool disc, a tool sleeve and a tool sleeve seat, the tool sleeve is distributed on the circumference of the tool disc through the tool sleeve seat; the tool changing system also includes:

[0007] 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 arranged 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 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 via 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 via 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 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 a distance therebetween is smaller than a 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 a space between the first pushing portion and the second pushing portion allows the tool sleeves on the circumference of the tool disc to pass through one by one.

[0013] Optionally, the tool changing system further comprises a plurality of tool changing mechanisms, each of which is respectively arranged corresponding to one of the rotation positions, each of which has a tool changing arm that can rotate around its own center point, and each of which has a clamping portion at both ends;

[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, which includes a plurality of spindles, a tool changing system as described in any of the above embodiments, and a control system, wherein the control system is used to control the movement 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.

[0016] Optionally, the CNC machine tool comprises a plurality of machine tool bodies, each of which comprises 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 push-out direction of the tool sleeve is parallel to the extension 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 above-described embodiments, and 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 for the 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 tool disc so that the tool sleeve 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° around its own center point, so that the target tool is separated from the tool sleeve and the empty tool sleeve 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 the original height, the target tool is installed on the spindle, and the tool to be unloaded is installed 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 tool 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, and the pushing member 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 embodiments of the present application at least have the corresponding technical effects of the technical solutions of the tool changing system, which 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. Thus, in part, they will become apparent from the following description or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0032] Figure 3 This is a schematic diagram of the structure of a disc tool magazine (with the tool sleeve and tool sleeve seat omitted) in some embodiments of the present application;

[0033] Figure 4 It is a structural schematic diagram of the knife 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 It is a schematic diagram of the structure of the knife sleeve and the knife sleeve seat in some embodiments of the present application;

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

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

[0038] Fig. 9 It is a schematic diagram of the structure of the pushing part in some embodiments of the present application;

[0039] Fig.10 This is a schematic diagram of the structure of the tool changing mechanism in some embodiments of the present application;

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

[0041] In the figure:

[0042] 10-disc tool magazine; 110-tool disk; 1110-disc body, 1120-support structure, 1121-support rib, 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 part, 3120-second pushing part, 3130-pushing part base, 3140-waist-shaped hole; 320-driving member; 330-mounting seat, 3310-mounting seat body, 3320-mounting plate, 3330-second rotating shaft, 3331-second speed reducer, 3332-protrusion, 3340-sensor; 340-buffer; 350-tool changing seat, 3501-accommodating space, 3510-second guide structure, 3511-guide part;

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

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

[0047] Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, without paying creative work, drawings of other embodiments can also be obtained according to the technical solutions shown in these drawings.

[0048] It should be understood that the "plurality" mentioned herein refers to two or more than two. In the description of this application, unless otherwise specified, " / " means or, for example, "A / B" means A or B; "and / or" in this article is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, B exists alone, etc.

[0049] In addition, in order 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 the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that expressions such as "first" and "second" do not limit the quantity and execution order, and 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 Figure 1(a) to Figure 10 The first aspect of the embodiment of the present application provides a tool changing system. 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 other end of the mounting seat 330 is provided with a tool change seat 350 and extends to the outside of the cutter disc 110. The pusher 310 is movably arranged on the mounting seat 330 to push the tool sleeve 120 to switch between the tool preparation position and the tool change position, wherein the tool change position is the position where the tool change seat 350 is located, and the tool preparation position is the position on the circumference of the cutter disc 110 that is opposite to the tool change seat 350. The mounting seat 330 can rotate in a horizontal plane around the center line of the cutter disc 110, thereby switching between multiple rotation positions. Different rotation positions correspond to different states of the tool sleeve conveying mechanism 30. Figures 1(a) and 1(b) show two states of the tool sleeve conveying mechanism 30. The mounting seat 330 of the tool sleeve conveying mechanism 30 rotates 180° from the state (I) shown in Figure 1(a) to the state (II) shown in Figure 1(b). It is to be understood that the mounting base 330 may also be switched between three or even more rotational positions. Figure 2 The mounting seat 330 is shown switching between three rotational positions. It should be noted that the angles between two adjacent rotational positions may not be equal, for example, the angle between the first rotational position and the second rotational position is 108°, the angle between the second rotational position and the third rotational position is 144°, and the angle between the third rotational position and the first rotational position is 108°. According to the actual situation of the positions of the multiple tool changing mechanisms used in conjunction with the tool sleeve conveying mechanism 30, the number and position of the rotational positions of the mounting seat 330 of the tool sleeve conveying mechanism 30 can be adaptively determined.

[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 rotation positions, so that a 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 for multiple spindles to change tools, 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 embodiment, a plurality of tool sleeve seats 130 are evenly distributed on the circumference of the cutter disc 110, and a tool sleeve 120 is arranged on each tool sleeve seat 130. A tool 40 can be stored in each tool sleeve 120. 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 through 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 a form of obliquely upward and outwardly divergent. The support ribs 1121 extend vertically upward and then extend obliquely upward and outwardly divergently, which can save the area occupied by the entire disc tool magazine 10 within the height range of the vertically upward extension. Weight reduction holes are provided on the support ribs 1121. Reinforcing ribs are provided on both sides of each supporting rib 1121 , and the reinforcing 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 figure, the disc tool magazine 10 also 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 tool disc connecting plate 1420. The tool disc connecting plate 1420 is located directly below the tool disc seat 1130 and the tool disc connecting plate 1420 and the tool disc seat 1130 are rotatably connected. The tool 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 tool 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 tool 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 seat 330 of the tool sleeve conveying mechanism 30 includes a mounting seat body 3310 and a mounting plate 3320. One end of the mounting seat body 3310 is mounted above the central area of ​​the cutter disc 110 through the mounting plate 3320, and the other end extends to the outside of the cutter disc 110 along the radial direction of the cutter disc 110 and is provided with a tool change seat 350. The central area of ​​the cutter disc 110 is concave downward, and the bottom of the mounting seat body 3310 rises from the mounting plate 3320 to the tool change seat 350 in a stepped manner, so that the center of gravity of the mounting seat body 3310 is relatively close to the central area of ​​the cutter disc 110, and the installation of the entire mounting seat body 3310 is more secure.

[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 change seat 350 has a receiving space 3501 (please refer to the embodiment of the present invention). Figure 7 ), the location of the accommodation space 3501 is the tool changing position, and the accommodation space 3501 is used to temporarily accommodate the tool sleeve 120 pushed to the tool changing position. The buffer 340 is installed on the tool changing seat 350, and the buffer head is located in front of the direction of pushing out the tool sleeve. The setting of the buffer 340 helps to reduce the impact and noise caused by the driving member 320.

[0058] See also Figure 3 In some embodiments of the present application, the disc tool magazine 10 may optionally include a first rotating shaft 1140 and a first reducer 1141, wherein the first reducer 1141 drives the cutter disc 110 to rotate through the first rotating shaft 1140; the cutter sleeve conveying mechanism 30 may include a second rotating shaft 3330 and a second reducer 3331, wherein the second reducer 3331 drives the mounting seat 330 to rotate through the second rotating shaft 3330; the center lines 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 driving mechanisms, respectively, so that the cutter disc 110 and the cutter sleeve conveying mechanism 30 can both rotate and the cutter sleeve conveying mechanism 30 can rotate relative to the cutter disc 110. The first reducer 1141 or the second reducer 3331 may be used in conjunction with a motor, or may be an integrated motor and reducer, wherein the motor used in conjunction or in an integrated structure may be a servo motor with relatively accurate control speed and position accuracy.

[0059] See also Figure 5In some embodiments of the present application, further, a protrusion 3332 is provided on the side of the second rotating shaft 3330, and a plurality of sensors 3340 are provided on the periphery of the second rotating shaft 3330. The number of sensors 3340 is the same as the number of rotation positions and corresponds to each other. The sensors 3340 are used to detect whether the mounting seat 330 has reached the corresponding rotation position. Although some driving mechanisms including servo motors can accurately control the mounting seat 330 of the tool sleeve conveying mechanism 30 to rotate to a certain specified rotation position, in order to further improve the accuracy of the tool sleeve conveying mechanism 30 reaching the rotation position, multiple sensors 3340 are used to detect and confirm whether the mounting seat 330 has reached the specified rotation position. For example, the sensor 3340 can be a position sensor, and the protrusion 3332 is used as a feature point. When the rotating protrusion 3332 is detected to exist within the detection range of the position sensor by non-contact or contact, it can be confirmed that the mounting seat 330 has reached the corresponding rotation position of the sensor 3340; the sensor 3340 can also be visually detected, and the protrusion 3332 is used 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 sleeve seat 130 has a first guide structure 1310, the tool change seat 350 has a second guide structure 3510, and the tool sleeve 120 has a sliding structure adapted to both the first guide structure 1310 and the second guide structure 3510, wherein the first guide structure 1310 and the second guide structure 3510 are guide protrusions, and the sliding structure is a sliding groove. The first guide structure 1310 is located at the tool preparation position, and the second guide structure 3510 is located at the tool change position. Under normal conditions, the tool sleeve 120 is placed on the tool sleeve seat 130 through the first guide structure 1310; during the tool change process, the pusher 310 is used to push the tool sleeve 120 to switch between the first guide structure 1310 and the second guide structure 3510. Through the cooperation of the sliding structure with the two guide structures respectively, when there is no clamping claw to clamp the tool sleeve 120, the tool sleeve 120 can be pushed without worrying about the tool sleeve 120 falling off. The tool sleeve 120 does not need to wait to be clamped by the clamping claw before being pushed out.

[0061] Further, in some embodiments of the present application, Figure 8As shown, the first guide structure 1310 on at least one of the plurality of tool sleeve seats 130 can be flush with the second guide structure 3510 (i.e., the first guide structure 1310 on the tool sleeve seat 130 at the tool change position of the tool disc 110 can be flush with the second guide structure 3510 on the tool change seat 350), and the distance between the two is less than the length of the sliding structure. "Flush" means that the two are flush in the height direction and also in another horizontal direction perpendicular to the push-out direction of the tool sleeve 120. The two guide structures are flush, so that after the matching state of the sliding structure of the tool sleeve 120 with one of the guide structures is released, it can smoothly enter into a state of mutual matching with the other guide structure without adjustment. The distance between the two flush guide structures 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 when it has not yet disengaged from the guiding cooperation with the first guide structure 1310 / second guide structure 3510, thereby preventing the knife sleeve 120 from falling when it is pushed through the space between the two guide structures.

[0062] Further, 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 extended 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 plugged 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 own extension direction. The cooperation between the guide portion and the sliding structure is similar to the cooperation between the slider and the slide groove. The size relationship between the two is configured such that a relatively small slider cooperates with a relatively large slide groove, thereby guiding a structure similar to a slider into a structure similar to a slide groove.

[0063] Optionally, in some embodiments of the present application, Fig. 9 As shown, the pushing member 310 includes a first pushing portion 3110 and a second pushing portion 3120 which are relatively arranged, wherein the space between the first pushing portion 3110 and the second pushing portion 3120 allows the tool sleeves 120 on the circumference of the tool 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 tool 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, and 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 and distributed in the pushing direction of the tool sleeve 120, and the second pushing portion 3120 is located directly in front of the first pushing portion 3110 in the pushing direction of 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. Fig. 9 As shown, the pusher 310 further includes a pusher base 3130, which is installed between the two ends of the mounting seat 330 and can move relative to the mounting seat 330, and the first pusher 3110 and the second pusher 3120 extend downward from the pusher base 3130. The pusher base 3130 can move to a position close to the tool changer seat 350, that is, the pusher can push the tool sleeve 120 to the position where the tool changer seat 350 is located at the farthest. The first guide structure 1310 on the tool sleeve seat 130 at the tool change position of the tool disc 110 and the second guide structure 3510 on the tool changer seat 350 have the same extension direction. The pusher base 3130 is provided with a waist-shaped hole 3140, and at least one of the first pusher 3110 and the second pusher 3120 is connected to the pusher base 3130 by the cooperation of the threaded fastener and the waist-shaped hole 3140, and the length direction 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 pushing direction of the knife sleeve 120, so as to adapt to knife sleeves 120 of different sizes.

[0065] In some embodiments of the present application, Fig.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 a 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, Fig.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] The second aspect of the embodiment of the present application provides a CNC machine tool. The CNC machine tool includes multiple spindles, a tool changing system as in any of the embodiments described above, and a control system, wherein the control system is used to control the movement of the tool changing system and the multiple spindles, and the tool changing system is used to provide tools 40 for the multiple spindles, so that a disc tool magazine 10 can be matched with multiple tool changing mechanisms 20 to change tools for the multiple spindles.

[0067] Please combine Fig.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 panels 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 panels 720, the crossbeam 60 is mounted on the two side panels 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 at least partially 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 Fig.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 plate 720 is parallel to the tool sleeve pushing direction, the angle between the extension directions of the adjacent side plates 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 footprint.

[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°. Fig.11 The included angle between the extending directions of the adjacent side panels 720 of the two machine tool bodies is 180°.

[0070] Specifically, Fig.11The X-axis direction and the Y-axis direction are shown, while the Z-axis direction, which is not shown, is perpendicular to both the X-axis direction and the Y-axis direction. The side plates 720 extend along the Y-axis direction, and the crossbeam 60 extends along the X-axis direction. The crossbeam 60 is mounted on the side plates 720 and can move relative to the side plates 720 along 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 that are away from each other.

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

[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, the tool changing mechanism 20 includes a tool changing arm 210 that can rotate around its own center point, and the two ends of the tool changing arm 210 have a clamping portion 2110, and 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 sleeve conveying mechanism 30 rotates to the rotation position corresponding to the spindle.

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

[0075] Step S130 : the tool sleeve conveying mechanism 30 pushes the target tool together with the tool sleeve 120 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 210 .

[0076] It is understandable that the target tool can be pushed out into the accommodating space 3501 of the tool change seat 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 change arm 210 (i.e., the spindle moves) at the same time, 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 spindle moves, the tool disc rotates, and the tool sleeve is pushed out in chronological order, or the tool disc rotates, the spindle moves, and the tool sleeve is pushed out in chronological order, or the spindle moves and the tool disc rotates at the same time, and then the tool sleeve is pushed out. In other words, the spindle moves first relative to the tool sleeve push-out, and the tool disc rotates first relative to the tool sleeve push-out. The spindle movement and the tool disc rotate can both be carried out simultaneously or one after the other. In the case where the tool sleeve is pushed out first, the spindle rotates, the tool sleeve is pushed out, and the spindle moves in chronological order.

[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 sleeve 120 and the empty tool sleeve 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 change arm 210 rises and returns to the original height, the target tool is installed on the spindle, and the tool to be unloaded is installed in the tool sleeve 120 of the tool changer 350. Similarly, the tool to be unloaded enters the accommodating space of the tool changer and the target tool is installed on the spindle, both of which can be performed simultaneously or one after the other.

[0079] Step S160: The tool sleeve conveying mechanism 30 pushes the tool to be unloaded together with the tool sleeve 120 back to the cutter head 110, and the spindle returns. Similarly, the tool sleeve returns to the cutter head and the spindle returns, and both 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 tool changing method described above greatly reduces the moving distance of the spindle, thereby reducing the tool changing time. In addition, the tool changing method described above uses a disc tool magazine 10 with multiple tool changing mechanisms 20 to change tools for multiple spindles, which improves processing efficiency while also reducing the manufacturing cost of CNC machine tools.

[0082] The above examples are only preferred embodiments of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by 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 sleeve is distributed on the circumference of the tool disc through the tool sleeve seat, and wherein: The tool changing system also includes: 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 arranged 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.

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 arranged on the side of the second rotating shaft, and a plurality of sensors are arranged 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 therebetween is smaller than a length of the sliding structure.

6. The tool changing system according to claim 5, characterized in that: The pushing member includes a first pushing portion and a second pushing portion that are arranged opposite to each other, wherein a space between the first pushing portion and the second pushing portion allows the knife sleeves on the circumference of the knife disc to pass through one by one.

7. The tool changing system according to any one of claims 1 to 6, characterized in that: The tool changing system further comprises a plurality of tool changing mechanisms, each of which is respectively arranged corresponding to one of the rotation positions, each of which has a tool changing arm that can rotate around its own center point, and each of which has a clamping portion at both ends; 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.

8. 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 7, 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.

9. The numerically controlled machine tool according to claim 8, characterized in that: It includes a plurality of 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 push-out direction of the tool sleeve is parallel to the extension 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.

10. A tool changing method for a CNC machine tool, characterized in that: Applied to the CNC machine tool according to claim 8 or 9, the tool changing system of the CNC machine tool comprises a plurality of tool changing mechanisms, the tool changing mechanisms comprise a tool changing arm that can rotate around its own center point, both ends of the tool changing arm have clamping parts, 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 comprises: 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 tool disc so that the tool sleeve 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° around its own center point, so that the target tool is separated from the tool sleeve and the empty tool sleeve 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 the original height, the target tool is installed on the spindle, and the tool to be unloaded is installed 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 tool disc, and the spindle returns.

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