Disc type automated tool magazine

Abstract

The present application relates to the technical fields of numerical control machine tool magazine, specifically to a disc type automatic tool magazine, comprising a tool magazine main body, a tool changing arm is arranged on the tool magazine main body, a locking block for clamping a tool is arranged in the tool changing arm, a movable groove is arranged on the tool changing arm, a movable plate is movably arranged in the movable groove, a butt joint groove is formed on the movable plate, a chamfer is formed on the edge of the butt joint groove, a butt joint block for being connected with the tool in the tool magazine main body is arranged in the butt joint groove; a rotating shaft is fixedly installed on the movable plate. The present application improves the compensation ability of the disc type automatic tool magazine to the downward bending deformation of the tool changing arm in long-term use, improves the parallel degree of the axis of the groove at the end of the tool changing arm for grabbing the tool and the axis of the tool in the tool magazine, reduces unnecessary collision risk, and improves the long-term stability and reliability of the tool magazine work.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool magazine technology, specifically a disc-type automated tool magazine. Background Technology

[0002] The disc-type automated tool magazine is one of the key functional modules for achieving efficient automated machining in modern vertical CNC machine tools. It typically consists of a disc-shaped tool magazine body, a tool changing arm, a drive mechanism, and a control system. Through a preset program, the tool changing arm grasps, transports, and exchanges tools, enabling rapid and automatic tool changes for multiple machining operations. This type of tool magazine has a compact structure and fast tool changing speed, effectively improving the machining efficiency and automation level of machine tools, and is widely used in mold manufacturing, precision parts machining, and other fields. For example, patent document CN114799986B, entitled "A Disc-Type Automated Tool Magazine," illustrates one such device type.

[0003] However, the disc-type automated tool magazines used in existing vertical CNC machine tools have potential mechanical performance degradation issues in their tool changing arm components during long-term use. Because the tool changing arm bears the weight of the tool itself, the inertial load generated by high-speed movement, and the alternating stress from frequent start-stop cycles, especially when the tool magazine capacity is large, the tool weight is high, or the machine tool is used intensively, the cantilever beam structure of the tool changing arm may gradually undergo plastic deformation during long-term use, leading to downward bending of the tool changing arm.

[0004] While this downward bending deformation may be minor initially, it gradually intensifies with prolonged use. The bent tool changer arm alters its designed motion trajectory and positioning accuracy. During tool changing, the axis of the groove at its end for gripping the tool will not be parallel to the tool's axis. This positional deviation can lead to unexpected mechanical interference or collisions between the tool changer arm and the tool or tool holder during tool exchange. This can cause minor issues like abnormal tool changing movements, noise, and vibration, affecting tool changing accuracy and efficiency; or serious damage to the tool changer arm structure and tool holder, increasing maintenance costs and potentially causing machine downtime due to failed tool changes, severely impacting the continuity and reliability of production. Furthermore, frequent collisions further accelerate the wear of related components, creating a vicious cycle.

[0005] Therefore, how to compensate for the downward bending deformation of the disc-shaped automated tool changer arm during long-term use, improve the parallelism between the axis of the groove at the end of the tool changer arm for gripping the tool and the axis of the tool in the tool magazine, reduce the risk of collision caused by this, and improve the long-term stability and reliability of the tool magazine operation has become a technical problem that urgently needs to be solved in this field.

[0006] Therefore, a disc-shaped automated tool magazine is proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a disc-type automated tool magazine that improves the ability of the disc-type automated tool magazine to compensate for the downward bending deformation of its tool changing arm during long-term use, improves the parallelism between the axis of the groove at the end of the tool changing arm for gripping the tool and the axis of the tool in the tool magazine, reduces the risk of unnecessary collisions, and improves the long-term stability and reliability of the tool magazine operation.

[0008] To achieve the above objectives, the present invention provides the following technical solutions. For ease of explanation, the assembly of the cutting tool and its corresponding tool holder will be collectively referred to as the cutting tool. Furthermore, the working methods of mechanisms with existing mature technical solutions will not be described in detail below, such as the rotation of the tool changing arm and the movement of the locking block on the tool changing arm.

[0009] A disc-shaped automated tool magazine includes a tool magazine body, a tool changing arm on the tool magazine body, a locking block for clamping tools inside the tool changing arm, a movable groove on the tool changing arm, a movable plate movably disposed within the movable groove, a mating groove formed on the movable plate, the edge of the mating groove being chamfered, and a mating block for engaging with tools inside the tool magazine body within the mating groove; a rotating shaft fixedly mounted on the movable plate, the rotating shaft being rotatably mounted within the movable groove; a spherical surface part one on the movable plate, and a spherical surface part two inside the movable groove, the center of the spherical surface part one and the center of the spherical surface part two being at the same position, and the axis of the rotating shaft passing through the common center of the spherical surface part one and the spherical surface part two.

[0010] Based on this setup, when the tool changer arm rotates to change tools, the mating slot first gradually approaches the tool. The tool initially pushes the locking block back into the tool changer arm, then mates with the mating slot. The chamfered edge of the tool's cylindrical outer surface and the mating slot's chamfer engage, forcing the movable plate to rotate within the movable slot until the axis of the mating slot is parallel to the axis of the tool. The tool changer arm then continues to rotate, causing the mating block to engage with the groove on the tool. Once engaged, the locking block is pushed out of the tool changer arm and fixed in place, preventing it from retracting. This completes the tool clamping process. The tool can then be normally stored or retrieved.

[0011] With this design, thanks to the mobility of the movable plate, the axis of the grooved part on the tool changer arm used to grip the tool can be adjusted according to the tool's position, thereby reducing unnecessary, unbuffered, and rigid mechanical interference or collisions to the tool when the tool changer arm is bent and then grips the tool, thus improving the long-term stability and reliability of the tool magazine operation.

[0012] Preferably, the movable groove has a shaft groove, and the rotating shaft is movably installed in the shaft groove; the shaft groove has an extension portion and a limiting portion, and a limiting plate is fixedly installed on one end of the rotating shaft inserted into the shaft groove; a movable gap is provided between the movable plate and the movable groove. A protrusion is fixedly installed on the movable plate, and a pressure sensor is fixedly installed on the protrusion, and the pressure sensor is electrically connected to the machine tool control system.

[0013] When the tool changer arm bends and deforms, its end gripping mechanism will exhibit varying degrees of lateral and vertical displacement deviations depending on the degree of bending. While the vertical displacement deviation can be compensated for to some extent by the taper of the mating block and the pre-set groove on the tool, the lateral displacement deviation lacks adjustment mechanisms. This results in the edge of the mating groove needing to be squeezed and scraped against the outer surface of the tool, thereby damaging the tool changer arm and the tool.

[0014] This design allows the extended portion of the shaft groove to move laterally within the groove, thus enabling lateral displacement of the movable plate. This compensates for lateral positional deviations in the mating groove caused by the bending of the tool changer arm, thereby reducing scratching between the mating groove and the tool, extending the service life of the tool changer arm and the tool, and improving the long-term stability and reliability of the tool magazine. Furthermore, the cooperation of the limiting portion of the shaft groove and the limiting plate effectively prevents the shaft from dislodging from the groove, helping to ensure the structural integrity of the invention and improving its reliability.

[0015] It is worth noting that although the present invention can improve the parallelism between the axis of the groove at the end of the tool changer arm for gripping the tool and the axis of the tool in the tool magazine by rotating the movable plate when the tool changer arm undergoes a certain bending deformation, that is, improve the parallelism between the axis of the docking groove and the axis of the tool, in actual application, in order to prevent the movable plate from falling out of the movable groove, the rotation range of the movable plate in the movable groove should be limited.

[0016] Furthermore, when the bending of the tool changer arm exceeds a certain degree, the lateral and vertical displacement deviations of its end gripping mechanism will be too large, resulting in the tool changer accuracy being completely unreliable. Therefore, it is necessary to set up critical warning measures.

[0017] Therefore, a protrusion and a pressure sensor are provided. This arrangement allows the protrusion to contact and press against the tool changer arm when the rotating plate reaches a certain limit, thereby causing the pressure sensor to send an electrical signal to the control system to stop the machine and remind the operator to perform maintenance, thus improving the reliability of the invention.

[0018] Furthermore, a rubber pad can be installed inside the movable joint, fixedly connected to the movable groove, and abutting against the movable plate. This arrangement fills the movable joint, preventing external debris and other impurities from entering and helping to ensure the smooth rotation of the movable plate within the movable groove.

[0019] Meanwhile, the rubber pad also generates a certain amount of friction on the movable plate, which helps maintain the current position of the movable plate. This eliminates the need for the movable plate to rotate again during each tool change, thereby reducing friction between the movable plate and the tool, extending the service life of both the tool and the movable plate, and improving the long-term stability and reliability of the invention. Furthermore, the elasticity of the rubber pad does not impede the lateral movement of the movable plate.

[0020] Preferably, a mounting shell is fixedly installed on the movable plate, and a locking head is movably installed inside the mounting shell. The locking head is used to abut against the tools in the tool magazine body. The locking head is provided with a concave spherical surface, and the locking block is provided with a convex spherical surface. The concave spherical surface abuts against the convex spherical surface.

[0021] When the tool changer arm bends, and the tool is clamped onto the tool changer arm using the locking block, the moving plate rotates while the locking block does not rotate accordingly. As a result, the point of force applied to the tool by the locking block when clamping the tool will deviate from the intended point of force application, which may lead to poor clamping effect.

[0022] With this configuration, the present invention clamps the tool onto the movable plate using a locking head instead of a locking block. When the locking block is ejected from the tool changer arm, the force is transmitted to the locking head through the engagement of its convex and concave spherical surfaces, and then applied to the tool via the locking head. The engagement of the convex and concave spherical surfaces allows for a certain angle between the locking block and the locking head, and the locking head rotates accordingly with the rotation of the movable plate. Therefore, the point of application of the clamping force on the tool will be the same as the intended point of application, avoiding the problem of poor clamping effect.

[0023] Preferably, a locking groove is provided in the shaft groove, and a rotating rod is rotatably installed in the locking groove. One end of the rotating rod is provided with a mating surface one. A receiving groove is provided on both the movable plate and the rotating shaft. A locking plate is movably installed in the receiving groove. The locking plate is provided with a mating surface two for abutting against the mating surface one. A top spring is fixedly installed at the bottom of the receiving groove, and the other end of the top spring is fixedly connected to the locking plate. The mating surface two is a conical surface.

[0024] With this setup, when the tool changer arm rotates closer to the tool and the tool enters the mating groove, the tool will abut against the locking plate. Simultaneously, as the tool changer arm continues to rotate, the tool will overcome the spring force and push the locking plate back into the receiving groove. When the locking plate is pushed back into the receiving groove, the second mating surface on the locking plate abuts against the first mating surface on the rotating rod, causing the rotating rod to rotate and tightly abut against the outer side of the rotating shaft, restricting the rotation of the rotating shaft. Once the locking plate is fully pushed back into the receiving groove, the locking block extends and clamps the tool. At this point, unless the tool is removed from the mating groove, the rotating rod will remain pressed against the rotating shaft, thus restricting the rotation of the movable plate.

[0025] Therefore, when the tool changer arm holds the tool and moves, the movable plate will not rotate additionally due to factors such as the tool's inertia, which helps to ensure the stability of the tool's position during the transfer process. This allows the tool to be better installed on the machine tool spindle or put back into the tool magazine body, improving the reliability of the invention during operation.

[0026] Alternatively, a friction pad can be fixedly installed on the end of the rotating rod that does not have a mating surface to abut against the outer side of the rotating shaft. This friction pad increases the friction between the rotating rod and the rotating shaft, thereby improving the limiting effect.

[0027] Preferably, the locking head includes a docking portion and an abutting portion, the docking portion being used to engage with the cutting tool; a buffer spring is fixedly installed on the docking portion, and the other end of the buffer spring is fixedly connected to the abutting portion; the concave spherical surface is formed on the side of the abutting portion that is not connected to the buffer spring.

[0028] When the tool changer arm bends, the movable plate will rotate to adapt to the tool's position. At this time, the direction in which the locking block is pushed out is not the same as the direction of the force applied by the locking head to clamp the tool; instead, they form an angle. Because of this angle, the displacement component of the locking block in the direction of the force applied by the locking head is less than its original displacement. Therefore, if no measures are taken, the clamping effect of the locking head on the tool may be greatly reduced or even completely lost.

[0029] With this design, when the tool enters the mating groove, it can overcome the spring force of the buffer spring and push the mating part back into the mounting housing. When the locking block pushes out from the tool changer arm to attempt to lock the tool, the locking block pushes the abutment part. At this time, the abutment part moves within the mounting housing and transmits the force to the locking head with the help of the buffer spring. Finally, the locking head presses against the side of the tool, thus clamping the tool together with the mating block. In this design, the elasticity of the buffer spring is utilized so that even if the displacement component of the locking block in the direction of the force applied by the locking head is less than its original displacement, the clamping force applied to the locking block can still be transmitted to the tool, thereby achieving stable clamping of the tool.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. This invention uses a docking groove to gradually approach the tool. The tool first pushes the locking block back into the tool changing arm, and then docks with the docking groove. By using the abutment between the cylindrical outer surface of the tool and the chamfer of the docking groove, the movable plate is forced to rotate in the movable groove until the axis of the docking groove is parallel to the axis of the tool. Utilizing the mobility of the movable plate, the axis of the groove part on the tool changing arm used to grip the tool can be adjusted according to the position of the tool, thereby reducing the mechanical interference or collision to the tool when the tool changing arm is bent and then grips the tool, thus improving the long-term stability and reliability of the tool magazine operation.

[0032] 2. By providing an extension, the shaft groove allows for lateral movement of the rotating shaft within the groove, thereby permitting lateral displacement of the movable plate. This compensates for lateral positional deviations in the mating groove caused by the bending of the tool changer arm, thus reducing scraping between the mating groove and the tool, extending the service life of the tool changer arm and the tool, and improving the long-term stability and reliability of the tool magazine. Furthermore, the cooperation of the limiting part and the limiting plate in the shaft groove effectively prevents the rotating shaft from dislodging from the groove, helping to ensure the structural integrity of the invention and improving its reliability.

[0033] 3. By setting a locking head, this invention clamps the tool onto the movable plate using the locking head instead of the locking block. When the locking block is pushed out from the tool changing arm, the force is transmitted to the locking head through the engagement of the convex and concave spherical surfaces, and then applied to the tool through the locking head. The engagement of the convex and concave spherical surfaces allows for a certain angle between the locking block and the locking head, and the locking head rotates accordingly with the rotation of the movable plate. Therefore, the point of application of the clamping force on the tool will be the same as the intended point of application, avoiding the problem of poor clamping effect. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 for Figure 1 A magnified view of part B in the middle section;

[0036] Figure 3 for Figure 1 Top sectional view of the structure of section A in the middle;

[0037] Figure 4 for Figure 3 Schematic diagram of the cross-section under the SS section;

[0038] Figure 5 for Figure 3A schematic diagram showing the state when the locking plate is fully retracted into the receiving slot;

[0039] Figure 6 for Figure 5 A magnified view of part C in the middle;

[0040] Figure 7 for Figure 5 A magnified view of part D in the middle;

[0041] Figure 8 for Figure 3 A schematic diagram showing the fit between the movable plate, rotating shaft, limiting plate, and receiving groove;

[0042] Figure 9 for Figure 3 A magnified view of part E in the middle.

[0043] In the diagram: 1. Tool magazine body; 2. Tool changing arm; 3. Movable plate; 4. Rubber pad; 5. Protrusion; 6. Locking block; 7. Locking head; 21. Movable groove; 22. Rotating shaft; 23. Limiting plate; 24. Locking groove; 25. Friction pad; 26. Top spring; 31. Docking groove; 32. Docking block; 33. Locking plate; 34. Receiving groove; 35. Spherical surface one; 36. Spherical surface two; 37. Pressure sensor; 71. Mounting shell; 72. Buffer spring; 73. Docking part; 74. Abutting part; 221. Shaft groove; 222. Extension part; 331. Rotating rod; 332. Mating surface one; 333. Mating surface two; 741. Concave spherical surface; 742. Convex spherical surface. Detailed Implementation

[0044] The following description, with the aid of the accompanying drawings listed in the foregoing "Description of Drawings", will clearly illustrate the specific embodiments of the present invention, in order to enable readers to have a more complete and objective understanding of the working principle and corresponding technical effects of the present invention.

[0045] like Figures 1 to 8 The figure illustrates a specific embodiment of the present invention. It should be noted beforehand that: firstly, to simplify the figures and improve readability, only the inventive part of the present invention is shown in detail in the figures, while the prior art parts are intentionally omitted; secondly, for the movement of the locking block 6 and the tool changing arm 2, mature technical solutions already exist in the prior art documents, so they will not be described again below; thirdly, to ensure clamping, two rotating rods 331 are symmetrically arranged; fourthly, the various spring-like parts in the figures, such as the buffer spring 72 and the top spring 26, can be replaced by other elastic components such as spring sheets, provided that the design requirements and application requirements are met.

[0046] When the present invention is installed, firstly, a tool changing arm 2 is provided on the tool magazine body 1, and a locking block 6 for clamping the tool is provided inside the tool changing arm 2. A movable groove 21 is provided on the tool changing arm 2, and a movable plate 3 is movably arranged in the movable groove 21. A docking groove 31 is opened on the movable plate 3, and the edge of the docking groove 31 is chamfered. A docking block 32 for engaging with the tool in the tool magazine body 1 is provided inside the docking groove 31. A rotating shaft 22 is fixedly installed on the movable plate 3 and is rotatably installed in the movable groove 21. A spherical part 35 is provided on the movable plate 3, and a spherical part 36 is provided inside the movable groove 21. The center of the spherical part 35 and the center of the spherical part 36 are at the same position. The axis of the rotating shaft 22 passes through the common center of the spherical part 35 and the center of the spherical part 36.

[0047] See Figure 4 A shaft groove 221 is provided in the movable groove 21, and a rotating shaft 22 is movably installed in the shaft groove 221. The shaft groove 221 has an extension 222 and a limiting part. A limiting plate 23 is fixedly installed on one end of the rotating shaft 22 that is inserted into the shaft groove 221. A movable gap is provided between the movable plate 3 and the movable groove 21. A rubber pad 4 is provided in the movable gap. The rubber pad 4 is fixedly connected to the movable groove 21 and abuts against the movable plate 3. A mounting shell 71 is fixedly installed on the movable plate 3. A locking head 7 is movably installed in the mounting shell 71. The locking head 7 is used to abut against the tools in the tool magazine body 1. The locking head 7 is provided with a concave spherical surface 741, and the locking block 6 is provided with a convex spherical surface 742. The concave spherical surface 741 abuts against the convex spherical surface 742.

[0048] A locking groove 24 is provided in the shaft groove 221, and a rotating rod 331 is rotatably installed in the locking groove 24. One end of the rotating rod 331 is provided with a mating surface 332. A receiving groove 34 is provided on both the movable plate 3 and the rotating shaft 22. A locking plate 33 is movably installed in the receiving groove 34. The locking plate 33 is provided with a second mating surface 333 for abutting against the first mating surface 332. A top spring 26 is fixedly installed at the bottom of the receiving groove 34, and the other end of the top spring 26 is fixedly connected to the locking plate 33. The second mating surface 333 is a conical surface. A friction pad 25 is fixedly installed on the end of the rotating rod 331 that does not have the first mating surface 332. The friction pad 25 is used for abutting against the outside of the rotating shaft 22.

[0049] The locking head 7 includes a mating part 73 and an abutment part 74. The mating part 73 is used to engage with the cutting tool. A buffer spring 72 is fixedly installed on the mating part 73, and the other end of the buffer spring 72 is fixedly connected to the abutment part 74. A concave spherical surface 741 is formed on the side of the abutment part 74 that is not connected to the buffer spring 72. A protrusion 5 is fixedly installed on the movable plate 3, and a pressure sensor 37 is fixedly installed on the protrusion 5. The pressure sensor 37 is electrically connected to the machine tool control system.

[0050] During the operation of this invention, when the tool changing arm 2 rotates to change the tool, firstly, the docking groove 31 gradually approaches the tool. The tool first pushes the locking block 6 back into the tool changing arm 2, and then docks with the docking groove 31. The chamfered edge of the docking groove 31, acting as abutment between the cylindrical outer surface of the tool and the chamfer of the tool, forces the movable plate 3 to rotate within the movable groove 21 until the axis of the docking groove 31 is parallel to the axis of the tool. Then, the tool changing arm 2 continues to rotate, causing the docking block 32 to engage with the groove on the tool. Once engaged, the locking block 6 is pushed out of the tool changing arm 2 and fixed, preventing it from retracting. At this point, the tool changing arm 2 has completed its gripping of the tool. Then, the tool can be normally stored or retrieved.

[0051] With this configuration, thanks to the mobility of the movable plate 3, the axis of the groove portion on the tool changer arm 2 used to grip the tool can be adjusted according to the tool's position, thereby reducing unnecessary, unbuffered, and rigid mechanical interference or collisions to the tool when the tool changer arm 2 is bent and then grips the tool, thus improving the long-term stability and reliability of the tool magazine operation.

[0052] During the operation of this invention, when the tool changer 2 is not gripping a tool, the state relationships of mating surface 1 332, mating surface 2 333, and rotating rod 331 are as follows: Figure 9 As shown. See below. Figure 6 When the tool changing arm 2 rotates closer to the tool, causing the tool to enter the mating groove 31, the tool will abut against the locking plate 33. Simultaneously, as the tool changing arm 2 continues to rotate, the tool will overcome the elastic force of the top spring 26 and push the locking plate 33 back into the receiving groove 34. When the locking plate 33 is pushed back into the receiving groove 34, the mating surface 333 on the locking plate 33 will abut against the mating surface 332 on the rotating rod 331, causing the rotating rod 331 to rotate and tightly abut against the outer side of the rotating shaft 22, restricting the rotation of the rotating shaft 22. After the locking plate 33 is completely pushed back into the receiving groove 34, the locking block 6 extends and clamps the tool.

[0053] At this point, unless the tool is removed from the docking slot 31, the rotating rod 331 will abut against the rotating shaft 22, thus restricting the rotation of the movable plate 3. Therefore, when the tool changing arm 2 moves while holding the tool, the movable plate 3 will not rotate additionally due to the tool's inertia or other factors, which helps ensure the tool's stable position during transport. This allows for better installation onto the machine tool spindle or return to the tool magazine body 1, improving the reliability of the invention during operation.

[0054] More specifically, Figure 3 This illustrates the state relationship of the locking plate 33 in this invention when it is not retracted into the receiving groove 34. See also... Figure 9This shows the positional relationship between mating surface 332 and mating surface 333 at this point. In this positional relationship, when mating surface 333 moves downwards and comes into contact with mating surface 332, since both are inclined surfaces and the rotating rod 331 can rotate, after the two inclined surfaces come into contact, [the following will occur]. Figure 9 There is a component of compressive force in the left and right directions, which causes the rotating rod 331 to rotate, thereby achieving... Figure 6 The shown is the matching state.

[0055] It is worth noting that in this invention, the docking groove 31 and the docking block 32 together constitute the overall structure of the docking groove 31, and the docking block 32 is a part of the docking groove 31. See also... Figure 5 The chamfer of the mating groove 31 is set on the mating block 32, specifically as follows: Figure 5 The two rounded chamfers on the middle connecting block 32.

[0056] Therefore, when the tool changer 2 attempts to insert the tool into the docking groove 31, the chamfer will press against the cylindrical surface of the tool. Since the tool's position is fixed by the tool magazine or spindle, the movable plate 3 will rotate under the pressure and match the tool's position, ultimately making the axis of the docking groove 31 parallel to the axis of the tool in the tool magazine or on the spindle, thus achieving the intended effect of the invention.

[0057] Specifically, taking the fact that the axis of the tool is parallel to the vertical direction as an example, the axis of the docking groove 31 should also be parallel to the vertical direction. This ensures that when the tool is grabbed into the docking groove 31 by the tool changing arm 2, the docking block 32 can smoothly engage with the tool without causing unnecessary collisions.

[0058] When the tool changer arm 2 is bent, during the process of the tool changer arm 2 attempting to insert the tool into the docking groove 31 (i.e., the grasping action), the bending of the tool changer arm 2 causes the axis of the docking groove 31 at the corresponding position to be non-parallel to the vertical direction; that is, the axis of the tool is not parallel to the axis of the docking groove 31. Simultaneously, the bending deformation of the tool changer arm 2 causes the docking block 32 to undergo a downward displacement and a positional flip around the horizontal plane.

[0059] However, the position and orientation of the cutting tool remain unchanged, and correspondingly, the position and orientation of the groove on the cutting tool also remain unchanged. This means that, compared to the mating posture of the tool changer arm 2 before deformation, the mating block 32 and the groove on the cutting tool are now misaligned. The mating block 32 has deviated from its original position, which would allow it to engage with the groove on the cutting tool without unnecessary collision. Therefore, when the mating block 32 attempts to engage with the groove on the cutting tool, due to the misalignment, the mating block 32 will first collide and be squeezed against the outer surface of the cutting tool.

[0060] The rounded chamfer gives the mating groove 31 a flared shape. During the extrusion process, the wide opening of the flared groove first contacts the tool to generate extrusion force. At this time, the position of the tool is fixed by the tool magazine or spindle. Therefore, as the tool changing arm 2 continues to rotate, the movable plate 3 will rotate under the extrusion force, eventually making the axis of the mating groove 31 parallel to the axis of the tool in the tool magazine.

[0061] Additionally, see Figure 4 ,when Figure 4 When the tool changer arm 2 shown in the diagram bends downwards, the movable plate 3 will simultaneously displace downwards in the vertical direction and to the left in the horizontal direction. That is, the gripping mechanism at the end of the tool changer arm 2 will exhibit lateral and vertical displacement deviations, and these two deviations will vary in degree depending on the degree of bending of the tool changer arm 2.

[0062] The vertical displacement deviation can be compensated and adjusted by the taper surface of the mating block 32 and the preset slot on the tool. However, the lateral displacement deviation lacks adjustment means, which causes the edge of the mating slot 31 to be squeezed and scraped against the outer side of the tool, thus damaging the tool changer arm 2 and the tool.

[0063] By providing the extension 222 of the shaft groove 221, the rotating shaft 22 can move laterally within the shaft groove 221, thereby allowing the movable plate 3 to undergo lateral displacement. Specifically, it is possible to... Figure 4 In the indicated state, the movable plate 3 is allowed to move laterally to the right to compensate for the leftward displacement deviation caused by the bending of the tool changer arm 2. Thus, the present invention can compensate for the lateral positional deviation of the mating groove 31 caused by the bending of the tool changer arm 2, thereby reducing the scraping between the mating groove 31 and the tool, extending the service life of the tool changer arm 2 and the tool, and improving the long-term stability and reliability of the tool magazine operation. Furthermore, the cooperation of the limiting part of the shaft groove 221 and the limiting plate 23 effectively prevents the rotating shaft 22 from dislodging from the shaft groove 221, thereby helping to ensure the structural integrity of the present invention and improving its reliability.

[0064] It is worth noting that although the present invention can improve the parallelism between the axis of the groove at the end of the tool changer arm 2 for gripping the tool and the axis of the tool in the tool magazine by rotating the movable plate 3 when the tool changer arm 2 undergoes a certain bending deformation, that is, improve the parallelism between the axis of the docking groove 31 and the axis of the tool, in actual application, in order to prevent the movable plate 3 from falling out of the movable groove 21, the rotation range of the movable plate 3 in the movable groove 21 should be limited.

[0065] Furthermore, when the bending of the tool changing arm 2 exceeds a certain degree, the lateral and vertical displacement deviations of its end gripping mechanism will be too large, resulting in the tool changing accuracy being completely unreliable. Therefore, it is necessary to set up critical warning measures.

[0066] Therefore, a protrusion 5 and a pressure sensor 37 are provided. This arrangement allows the protrusion 5 to contact and press against the tool changer arm 2 when the rotation of the movable plate 3 reaches a certain limit, thereby causing the pressure sensor 37 to send an electrical signal to the control system to stop the machine and remind the operator to perform maintenance, thus improving the reliability of the invention.

[0067] Furthermore, a rubber pad 4 can be installed inside the movable joint, and the rubber pad 4 can be fixedly connected to the movable groove 21, so that the rubber pad 4 abuts against the movable plate 3. This arrangement can fill the movable joint, prevent external debris and other impurities from entering the movable joint, and help ensure the smooth rotation of the movable plate 3 within the movable groove 21.

[0068] Meanwhile, the rubber pad 4 also generates a certain amount of friction on the movable plate 3, which helps maintain the current position of the movable plate 3. This eliminates the need for the movable plate 3 to rotate again during each tool change, thereby reducing friction between the movable plate 3 and the tool, extending the service life of both the tool and the movable plate 3, and improving the long-term stability and reliability of the invention. Furthermore, the elasticity of the rubber pad 4 does not impede the lateral movement of the movable plate 3.

[0069] It should be emphasized that, based on the content described above, although the beneficial effects of the present invention have been explained in detail and corresponding specific embodiments have been provided, those skilled in the art can still achieve the same technical effects by making conventional substitutions, modifications, or other alterations to the given technical solutions without creative effort, provided they fully understand the working principle of the present invention. However, such modifications should not be considered as exceeding the scope of the present invention. Specifically, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disc-shaped automated tool magazine, comprising a tool magazine body (1), wherein a tool changing arm (2) is provided on the tool magazine body (1), and a locking block (6) for clamping the tool is provided inside the tool changing arm (2), characterized in that, The tool changing arm (2) is provided with a movable groove (21), and a movable plate (3) is movably arranged in the movable groove (21). A docking groove (31) is opened on the movable plate (3), and a chamfer is opened on the edge of the docking groove (31). A docking block (32) for engaging with the tool in the tool magazine body (1) is provided in the docking groove (31). A rotating shaft (22) is fixedly installed on the movable plate (3), and the rotating shaft (22) is rotatably installed in the movable groove (21). A spherical part one (35) is provided on the movable plate (3), and a spherical part two (36) is provided inside the movable groove (21). The center positions of the spherical part one (35) and the spherical part two (36) are the same. The axis of the rotating shaft (22) passes through the common center of the spherical part one (35) and the spherical part two (36).

2. The disc-type automated tool magazine according to claim 1, characterized in that, The movable groove (21) is provided with a shaft groove (221), and the rotating shaft (22) is movably installed in the shaft groove (221); the shaft groove (221) has an extension (222), the shaft groove (221) has a limiting part, and a limiting plate (23) is fixedly installed on one end of the rotating shaft (221) inserted into the shaft groove (221); a movable gap is provided between the movable plate (3) and the movable groove (21).

3. A disc-type automated tool magazine according to claim 2, characterized in that, A rubber pad (4) is provided inside the movable joint. The rubber pad (4) is fixedly connected to the movable groove (21). The rubber pad (4) is abutted against the movable plate (3).

4. A disc-type automated tool magazine according to claim 2, characterized in that, An installation shell (71) is fixedly installed on the movable plate (3), and a locking head (7) is movably installed inside the installation shell (71). The locking head (7) is used to abut against the cutting tool in the tool magazine body (1). A concave spherical surface (741) is provided on the locking head (7), and a convex spherical surface (742) is provided on the locking block (6). The concave spherical surface (741) and the convex spherical surface (742) abut against each other.

5. A disc-type automated tool magazine according to claim 2, characterized in that, A locking groove (24) is provided in the shaft groove (221), and a rotating rod (331) is rotatably installed in the locking groove (24). A mating surface (332) is provided on one end of the rotating rod (331). A receiving groove (34) is provided on both the movable plate (3) and the rotating shaft (22). A locking plate (33) is movably installed in the receiving groove (34). A mating surface (333) is provided on the locking plate (33) for abutting against the mating surface (332). A top spring (26) is fixedly installed at the bottom of the receiving groove (34). The other end of the top spring (26) is fixedly connected to the locking plate (33). The mating surface (333) is a conical surface.

6. A disc-type automated tool magazine according to claim 5, characterized in that, A friction pad (25) is fixedly installed on one end of the rotating rod (331) without a mating surface (332), and the friction pad (25) is used to abut against the outside of the rotating shaft (22).

7. A disc-type automated tool magazine according to claim 4, characterized in that, The locking head (7) includes a docking part (73) and an abutting part (74). The docking part (73) is used to engage with the cutting tool. A buffer spring (72) is fixedly installed on the docking part (73). The other end of the buffer spring (72) is fixedly connected to the abutting part (74). The concave spherical surface (741) is opened on the side of the abutting part (74) that is not connected to the buffer spring (72).

8. A disc-type automated tool magazine according to claim 2, characterized in that, A protrusion (5) is fixedly installed on the movable plate (3), and a pressure sensor (37) is fixedly installed on the protrusion (5). The pressure sensor (37) is electrically connected to the machine tool control system.

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