A gantry machine tool with quick tool changer structure

Abstract

The application relates to the field of machine tools and discloses a gantry machine tool with a quick tool changer tool magazine structure, which comprises a tool magazine and a tool changing assembly arranged on a machine tool frame, the tool magazine comprises a column support slidingly arranged on the machine tool frame along the length direction of the machine tool frame and a first linear module for driving the column support to move, mounting supports are arranged between the upper ends of the column support, a ring rail is arranged on the mounting supports, and a plurality of groups of tool storage units are arranged on the ring rail along the extension direction; when the tool is changed, the tool can be taken off from the tool magazine in advance through the tool changing assembly, and the tool can be pulled to move close to the machining center of the machine tool; after the tool of the machining center of the machine tool is machined, the tool changing can be started without moving, so that the gantry machine tool can realize quick tool changing during machining, the machining efficiency and speed are remarkably improved, the machining interruption caused by the time consumption of tool changing is reduced, manual operation burden is reduced, and the automation degree of the system is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tools, specifically to the field of machine tool magazines, and particularly to a gantry machine tool with a fast tool magazine changing structure. Background Technology

[0002] With the continuous development of technology, machine tools have gradually evolved into CNC automation. Existing CNC machine tools generally have a tool magazine system that can realize automatic tool changing. The CNC machine tool tool magazine system generally includes a tool magazine, a tool changing mechanism, and a control system. The tool magazine mainly provides the tool storage position and can correctly select and position the tool according to the control system for tool exchange. The tool changing mechanism, also called a robot, is responsible for performing the tool exchange action.

[0003] Based on a search of machine tool tool magazine systems, a Chinese invention patent was found, with authorization announcement number CN113319630B. This patent discloses a CNC machine tool tool magazine. Although it expands the tool magazine capacity through two tool discs, it still has some shortcomings. For example, section

[0043] of the specification details how the tool holder clamps and fixes the tool. During tool removal, the robot applies force to the tool along the axial direction of the insertion tube. Pressure is generated between the groove of the tool shank and the ball. The ball presses against the conical surface of the compression ring, causing the compression ring to overcome the elastic force of the first elastic unit and move, thus allowing the tool to be removed from the insertion tube. When the tool is removed from the tube, this clamping and fixing method causes the first elastic unit to release its elastic force the instant the tool is removed from the insertion tube, causing the ball to move and impact the wall of the first annular groove. This can easily lead to vibration of the tool holder and abnormal usage. Vibration can easily cause positional deviations of the components that make up the tool magazine, thus affecting subsequent tool changing operations. In addition, this clamping and fixing method requires the installation of components such as the ball, the first elastic unit, and the compression ring on the tool holder, making the structure relatively cumbersome and requiring a certain amount of space. It is necessary to improve this method to reduce the space occupied and thus increase the capacity of the tool magazine.

[0004] Based on the above, this invention proposes a gantry milling machine with a fast tool magazine changing structure. Summary of the Invention

[0005] To address the problems mentioned in the background above, the present invention provides a gantry milling machine with a rapid tool changer structure.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0007] A gantry machine tool with a fast tool magazine changing structure includes a tool magazine and a tool changing assembly mounted on the machine tool frame. The tool magazine includes a column support that is slidably mounted on the machine tool frame along the length of the machine tool frame and a first linear module that drives the column support to move. A mounting bracket is provided between the upper ends of the column support. A ring rail is provided on the mounting bracket. Several sets of tool storage units are provided on the ring rail along the extension direction.

[0008] The tool storage unit includes a tool holder that slides and guides with a ring rail. A vertically arranged tool sleeve is located at one end of the tool holder outside the ring rail. The tool sleeve is hollow inside, and its inner cavity is divided along the axis into a lower frustum section, a middle cylindrical section, and an upper cylindrical section with unequal diameters. The diameter of the lower frustum section decreases from bottom to top, while the diameter of the upper cylindrical section is larger than that of the middle cylindrical section. A fixed shaft is coaxially arranged inside the upper cylindrical section. The fixed shaft is hollow inside, and an internal step is coaxially arranged at the upper opening of the fixed shaft. A flexible claw extends downwards from the bottom of the internal step. Multiple flexible claws are arranged in an array along the circumference of the fixed shaft. The flexible claws are made of elastic material, and an arc surface is provided on the side of the flexible claw facing the axis of the fixed shaft. The area formed by the arc surfaces of the multiple flexible claws matches the convex ball a of the tool holder.

[0009] Furthermore, a timing belt assembly is installed on the mounting bracket. The pulleys of the timing belt assembly are arranged vertically, with each pulley close to one of the two column supports. The shape of the ring rail is consistent with the shape of the timing belt of the timing belt assembly, and the dimensions of the two are scaled proportionally. The center line of the ring rail coincides with the center line of the timing belt.

[0010] Furthermore, a linkage groove is provided on the side of the tool holder facing the inner side of the ring rail, and a linkage protrusion is provided on the surface of the timing belt of the timing belt assembly. The linkage protrusion and the linkage groove form a sliding connection along the sliding direction perpendicular to the tool holder.

[0011] Furthermore, the lower end of the elastic claw is rounded on the side facing the center line of the fixed shaft, and the shape of the lower frustum section matches the frustum section b of the tool holder.

[0012] Furthermore, the mounting bracket is equipped with a positioning component, which is located inside the timing belt assembly.

[0013] Furthermore, the positioning component includes a slide block that is slidably mounted on a mounting bracket along the width direction of the machine tool frame, and a drive component for driving the slide block to move is provided between the slide block and the mounting bracket;

[0014] A positioning seat is slidably mounted on the slide along the length of the machine tool frame. The positioning seat is driven to move by the second linear module mounted on the slide. The positioning seat has two inclined surfaces on the side facing the machine tool machining center. The distance between the two inclined surfaces increases along the sliding direction of the positioning seat and from the tool magazine towards the machine tool machining center.

[0015] Two inclined surfaces are provided on the side of the tool holder facing the inner side of the ring rail. When the tool holder is located on the side of the positioning component facing the machining center of the machine tool, the inclined surface two is parallel to the corresponding inclined surface one.

[0016] Furthermore, the drive component includes a rack mounted on a mounting bracket and a first motor mounted on a slide. The output end of the first motor is provided with a gear that meshes with the rack. The rack extends in a direction parallel to the width direction of the machine tool frame.

[0017] Furthermore, the tool changing assembly includes a horizontal support that is slidably disposed between two column supports in a vertical direction, and a third linear module disposed on the column supports and used to drive the horizontal support to move.

[0018] A first movable bracket is slidably mounted on the cross support along the width direction of the machine tool frame. The first movable bracket is driven to move by a fourth linear module mounted on the cross support.

[0019] A second movable support is slidably mounted on the first movable support along the length of the machine tool frame. The second movable support is driven to move by the fifth linear module mounted on the first movable support.

[0020] Furthermore, the second movable bracket is equipped with a vertically arranged rotating shaft and a second motor for driving the rotating shaft to rotate. The upper end of the rotating shaft is provided with a horizontally arranged tool changer. Each end of the tool changer is provided with a tool changer claw, which can be inserted into the annular groove c of the tool holder.

[0021] Furthermore, an electromagnet is installed on the rotating shaft, and both the tool changer and the tool changer claw are made of magnetic material.

[0022] Compared with the prior art, the beneficial effects of this invention are as follows:

[0023] In this solution, tools can be pre-loaded from the tool magazine via the tool changing assembly and moved to the vicinity of the machining center. When the tool on the machining center needs changing after machining, the tool change can begin immediately without moving the machining center. Therefore, this allows for rapid tool changing on the gantry milling machine, significantly improving machining efficiency and speed, reducing machining interruptions caused by time-consuming tool changes, reducing manual operation workload, and increasing the system's automation level. Furthermore:

[0024] 1. In this solution, the tool changing assembly can remove the tool by applying a vertical downward force and insert it back into the tool magazine by turning the tool vertically upward. The tool removal and storage is convenient and quick. In addition, by replacing the sphere, the first elastic unit and the compression ring and other components mentioned in the patent literature mentioned in the background technology with elastic claws, the structure is simplified and more tools can be stored in the same volume.

[0025] 2. In this solution, the positioning component not only positions the tool storage unit where the tool to be changed is located before the tool change, preventing positional deviations that may affect the tool change, but also solves the vibration impact caused by the elastic claw recovering its elastic deformation during the subsequent tool change process. Attached Figure Description

[0026] Figure 1 A schematic diagram of an existing gantry milling machine. Figure 1 ;

[0027] Figure 2 A schematic diagram of an existing gantry milling machine. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of a cutting tool;

[0029] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0030] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0031] Figure 6 This is a schematic diagram of the tool magazine and tool changing assembly;

[0032] Figure 7 This is a schematic diagram of the timing belt assembly, ring rail, tool storage unit, positioning assembly, and tool changing assembly.

[0033] Figure 8 This is a schematic diagram of the tool storage unit and the timing belt;

[0034] Figure 9 This is a partial sectional view of the tool storage unit;

[0035] Figure 10 A schematic diagram of the positioning component;

[0036] Figure 11 This is a schematic diagram of the tool changer assembly;

[0037] Figure 12 This is a schematic diagram of the rotating shaft and the tool changer.

[0038] The labels in the attached diagram are:

[0039] 100. Tool magazine; 101. First linear module; 102. Column support; 103. Ring rail; 104. Synchronous belt assembly; 1041. Linking pin; 105. Tool storage unit; 1051. Tool holder; 1052. Linking groove; 1053. Tool sleeve; 1054. Fixed shaft; 1055. Elastic claw; 106. Positioning assembly; 1061. Slide; 1062. Second linear module; 1063. Positioning seat; 1064. Rack; 1065. First motor; 200. Tool changing assembly; 201. Third linear module; 202. Horizontal support; 203. Fourth linear module; 204. First movable support; 205. Fifth linear module; 206. Second movable support; 207. Second motor; 208. Rotary shaft; 209. Tool changing holder; 210. Tool changing claw; 211. Electromagnet. Detailed Implementation

[0040] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0041] This plan is attached Figure 3 This is a schematic diagram of a cutting tool. The cutting tool is existing technology. For ease of explanation later, the tool holder includes a tool holder body, which includes a frustum section b and a cylindrical section d. The end of the frustum section b is provided with a convex ball a, and the outer surface of the cylindrical section d is provided with an annular groove c. e refers to the cutting tip of the tool. This naming method is for ease of explanation later.

[0042] Reference Figures 1-12 A gantry machine tool with a fast tool magazine changing structure includes a tool magazine 100 and a tool changing assembly 200 mounted on the machine tool frame.

[0043] Tool magazine 100:

[0044] Reference Figures 6-10 The tool magazine 100 includes a column support 102 slidably mounted on the machine tool frame along the length of the machine tool frame and a first linear module 101 for driving the column support 102 to move. Further, there are two column supports 102 respectively located on both sides of the machine tool frame along the length of the machine tool frame, and there are correspondingly two first linear modules 101.

[0045] An installation bracket is provided between the upper ends of the two column supports 102.

[0046] The mounting bracket is equipped with a ring rail 103 and a timing belt assembly 104. The pulleys of the timing belt assembly 104 are arranged vertically, with each pulley close to one of the two column supports 102. The shape of the ring rail 103 is the same as the shape of the timing belt of the timing belt assembly 104, and their dimensions are scaled proportionally. The center line of the ring rail 103 coincides with the center line of the timing belt. It should be noted that the timing belt assembly 104 can be replaced by existing sprocket and chain technology to form a chain-type tool magazine.

[0047] Several sets of knife storage units 105 are provided along the extension direction of the ring rail 103.

[0048] The tool storage unit 105 includes a tool storage seat 1051 that has a sliding guide engagement with the ring rail 103. Furthermore, a linkage groove 1052 is provided on the side of the tool storage seat 1051 facing the inner side of the ring rail 103. A linkage protrusion 1041 is provided on the surface of the synchronous belt of the synchronous belt assembly 104. The linkage protrusion 1041 and the linkage groove 1052 form a sliding connection along the sliding direction perpendicular to the tool storage seat 1051. Therefore, when the synchronous belt assembly 104 is running, the tool storage seat 1051 can be pulled to move on the ring rail 103 through the engagement of the linkage protrusion 1041 and the linkage groove 1052.

[0049] The tool holder 1051 is located at one end outside the ring rail 103 and has a vertically arranged tool sleeve 1053. The tool sleeve 1053 is hollow inside and the inner cavity is divided into a lower frustum section, a middle cylindrical section and an upper cylindrical section along the axis. The diameter of the lower frustum section decreases from bottom to top, and the diameter of the upper cylindrical section is larger than that of the middle cylindrical section.

[0050] A fixed shaft 1054 is coaxially arranged inside the upper cylindrical section. The fixed shaft 1054 is hollow inside. An internal step is coaxially arranged at the upper opening of the fixed shaft 1054. An elastic claw 1055 extends downward from the bottom of the internal step. Multiple elastic claws 1055 are arranged in an array along the circumference of the fixed shaft 1054.

[0051] The elastic claw 1055 is made of elastic material. The lower end of the elastic claw 1055 is rounded on the side facing the axis of the fixed shaft 1054. The side of the elastic claw 1055 facing the axis of the fixed shaft 1054 is provided with an arc surface. The area formed by the arc surfaces of multiple elastic claws 1055 matches the convex ball a of the tool holder. That is, the convex ball a can be located in the area formed by multiple arc surfaces and the arc surfaces fit the outer spherical surface of the convex ball a.

[0052] The shape of the lower frustum section matches the frustum section b of the tool holder, that is, when the frustum section b is located inside the lower frustum section, the two fit together.

[0053] The process of retrieving and storing the tool in the tool storage unit 105 is specifically manifested as follows:

[0054] Reference Figure 9The tool is held in the tool storage unit 105. When a vertical downward force is applied to the tool, the elastic claw 1055 will deflect away from the axis of the fixed axis 1054 under the cooperation of the convex ball a and the arc surface, and the tool can be removed from the tool sleeve 1053. That is, the tool can be removed by applying downward force.

[0055] Similarly, the tool is placed coaxially below the tool sleeve 1053, and then a vertical upward force is applied to the tool. Under the cooperation of the rounded arc surface and the convex ball a, the elastic claw 1055 will deflect away from the axis of the fixed axis 1054. When the convex ball a is located in the middle of the arc surface of the elastic claw 1055, the elastic deformation of the elastic claw 1055 is restored, thereby achieving the clamping of the convex ball a. The frustum section b of the tool holder also fits with the lower frustum section of the inner cavity of the tool sleeve 1053, and the tool is placed.

[0056] In summary, the tool can be removed by pointing it vertically downwards and inserted back vertically upwards, making tool retrieval and storage convenient and quick. In addition, by replacing the sphere, first elastic unit, and compression ring mentioned in the patent document mentioned in the background art with the elastic claw 1055, the structure is simplified, and more tools can be stored in the same volume.

[0057] Positioning component 106:

[0058] As can be seen from the above process, during tool changing, after the tool is removed, the elastic deformation of the elastic claw 1055 will recover, generating vibration. This vibration can easily cause a slight displacement of the tool storage unit 105 on the ring rail 103. With repeated occurrences, the positional accuracy of the tool storage unit 105 deteriorates, easily affecting the tool changing process. Furthermore, the tool magazine 100 in this solution is equivalent to existing chain-type tool magazine technology. After prolonged use, the timing belt group 104 or chain technology itself may also have some errors, thus affecting the positional accuracy of the tool storage unit 105 and consequently impacting tool changing. To solve this problem, refer to... Figure 7 The mounting bracket is equipped with a positioning component 106, which is located inside the timing belt group 104.

[0059] Reference Figure 10 The positioning component 106 includes a slide 1061 slidably mounted on a mounting bracket along the width direction of the machine tool frame. A driving component for driving the slide 1061 to move is provided between the slide 1061 and the mounting bracket. Further, the driving component includes a rack 1064 mounted on the mounting bracket and a first motor 1065 mounted on the slide 1061. A gear is provided at the output end of the first motor 1065, and the gear meshes with the rack 1064. The extension direction of the rack 1064 is parallel to the width direction of the machine tool frame. Through the cooperation of the first motor 1065, the gear, and the rack 1064, the slide 1061 can be driven to move.

[0060] A positioning seat 1063 is slidably disposed on the slide 1061 along the length of the machine tool frame. The positioning seat 1063 is driven to move by the second linear module 1062, which is disposed on the slide 1061.

[0061] The positioning seat 1063 has two inclined surfaces on the side facing the machine tool machining center. The distance between the two inclined surfaces increases along the sliding direction of the positioning seat 1063 and from the tool magazine 100 toward the machine tool machining center.

[0062] Reference Figure 8 The tool holder 1051 has two inclined surfaces on the side facing the inner side of the ring rail 103. When the positioning component 106 on which the tool holder 1051 is located faces the machining center of the machine tool, the inclined surfaces are parallel to the corresponding inclined surfaces.

[0063] The working process of positioning component 106 is as follows:

[0064] Before the tool is retrieved, the sliding block 1061 is moved by the driving component, so that the positioning seat 1063 is aligned with the tool storage seat 1051 of the tool storage unit 105 where the tool to be retrieved is located. Then, the positioning seat 1063 is moved closer to the tool storage seat 1051 by the second linear module 1062. If the position of the tool storage seat 1051 is not deviated, the second inclined plane will eventually fit with the first inclined plane. If the position of the tool storage seat 1051 is deviated, the position of the tool storage seat 1051 can be corrected by the cooperation of the first and second inclined planes. It should be noted that compared with the synchronous belt group 104 or sprocket and chain technology, the driving component only needs to perform linear motion, and its motion accuracy is relatively more precise. Preferably, compared with the gear and rack drive method, the driving component prefers the existing lead screw linear motion technology, which has higher motion accuracy.

[0065] When retrieving the tool, since the tool holder 1051 is slidably mounted on the ring rail 103, the vibration caused by the elastic deformation of the elastic claw 1055 will only affect the positional accuracy of the tool holder 1051 on the ring rail 103. When the inclined surface one of the positioning seat 1063 cooperates with the inclined surface two of the tool holder 1051, the movement of the slide 1061 on the ring rail 103 is restricted, thus solving the positional accuracy impact caused by vibration. Similarly, when storing the tool, the positioning component 106 also operates, so the vibration during storage can also be resolved.

[0066] In summary, the positioning component of this solution can not only position the tool storage unit 105 where the tool to be changed is located before the tool change, so as to prevent it from affecting the tool change, but also solve the vibration effect caused by the elastic claw 1055 restoring its elastic deformation during the subsequent tool change process.

[0067] Tool changer assembly 200:

[0068] Reference Figure 7 , Figure 11 and Figure 12 The tool changing assembly 200 includes a horizontal support 202 that is slidably disposed between two column supports 102 in a vertical direction. The horizontal support 202 is driven to move by a third linear module 201, which is disposed on the column support 102.

[0069] A first movable support 204 is slidably disposed on the horizontal support 202 along the width direction of the machine tool frame. The first movable support 204 is driven to move by the fourth linear module 203, which is disposed on the horizontal support 202.

[0070] A second movable support 206 is slidably disposed on the first movable support 204 along the length of the machine tool frame. The second movable support 206 is driven to move by the fifth linear module 205, which is disposed on the first movable support 204.

[0071] The second movable bracket 206 has a vertically arranged rotating shaft 208 and a second motor 207 for driving the rotating shaft 208 to rotate.

[0072] A horizontally arranged tool changer 209 is provided at the upper end of the rotating shaft 208. A tool changer pawl 210 is provided at each end of the tool changer 209. An electromagnet 211 is also provided on the rotating shaft 208. Both the tool changer 209 and the tool changer pawl 210 are made of magnetic materials, such as iron. When the electromagnet 211 is energized and generates magnetic force, it can make the tool changer pawl 210 magnetic, thus applying a magnetic adsorption effect to the tool.

[0073] The working process of the tool changer assembly 200 is as follows:

[0074] Through the cooperation of the first linear module 101, the third linear module 201, the fourth linear module 203, and the fifth linear module 205, a tool changer 210 can be inserted into the annular groove c of the tool holder of the corresponding tool storage unit 105. Then, the third linear module 201 drives the horizontal support 202 to move down, which in turn moves the tool changer 209 down, applying a vertical downward force to the tool and removing the tool. At the same time, the electromagnet 211 is energized to achieve magnetic adsorption of the tool, preventing the tool from shaking during the subsequent movement.

[0075] Similarly, through the cooperation of the first linear module 101, the third linear module 201, the fourth linear module 203, the fifth linear module 205, and the second motor 207, another tool changer 210 is inserted into the annular groove c of the tool in the machine tool machining center. The machine tool machining center releases the tool, which is magnetically attracted to the tool changer 209. Then, the second motor 207 drives the rotating shaft 208 to rotate, cooperating with the fifth linear module 205 and the third linear module 201 to insert the tool previously taken from the tool magazine 100 into the machine tool machining center, where the machine tool machining center clamps the tool.

[0076] Then, through the cooperation of the first linear module 101, the third linear module 201, the fourth linear module 203, the fifth linear module 205, and the second motor 207, the removed cutting tool is inserted back into the corresponding tool storage unit 105.

[0077] It should be noted that the clamping or releasing of cutting tools by machining centers is a technology that can be achieved by existing technology, and will not be elaborated upon.

[0078] The linear module mentioned in this solution can adopt existing electric telescopic rod technology or existing lead screw linear motion technology, etc., which will not be elaborated further.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gantry machine tool with quick tool changer structure, comprising a tool magazine (100) and a tool changer assembly (200) arranged on a machine frame, characterized in that, The tool magazine (100) comprises a column support (102) arranged on a machine tool frame and sliding along the length direction of the machine tool frame, and a first linear module (101) for driving the column support (102) to move; the upper ends of the column support (102) are provided with a mounting support, and the mounting support is provided with a ring rail (103); a plurality of groups of tool storage units (105) are arranged on the ring rail (103) along the extending direction; The tool storage unit (105) comprises a tool storage seat (1051) which is in sliding guide cooperation with the ring rail (103); the tool storage seat (1051) is provided with a tool sleeve (1053) arranged vertically at one end outside the ring rail (103); the tool sleeve (1053) is hollow inside and the inner cavity is divided into coaxial unequal-diameter lower frustum section, middle cylinder section and upper cylinder section along the axial direction; the diameter of the lower frustum section decreases from bottom to top; the diameter of the upper cylinder section is larger than that of the middle cylinder section; a fixed shaft (1054) is coaxially arranged in the upper cylinder section; the fixed shaft (1054) is hollow inside; a built-in step is coaxially arranged at the upper opening of the fixed shaft (1054); the bottom of the built-in step extends downwardly to form an elastic claw (1055); a plurality of elastic claws (1055) are arranged in the circumferential direction of the fixed shaft (1054); the elastic claw (1055) is made of elastic material; the elastic claw (1055) is provided with an arc surface on the side facing the axial line of the fixed shaft (1054); the arc surfaces of the plurality of elastic claws (1055) cooperate to form a region matched with the convex sphere a of the tool handle; The mounting support is provided with a synchronous belt group (104); the pulleys of the synchronous belt group (104) are arranged vertically and two pulleys are respectively close to the two column supports (102); the shape of the ring rail (103) is consistent with the shape of the synchronous belt of the synchronous belt group (104) and the sizes of the two are proportionally scaled; the center line of the ring rail (103) coincides with the center line of the synchronous belt; The side of the tool storage seat (1051) facing the inside of the ring rail (103) is provided with a linkage groove (1052); the surface of the synchronous belt of the synchronous belt group (104) is provided with a linkage protruding pin (1041); the linkage protruding pin (1041) and the linkage groove (1052) are in sliding connection along the direction perpendicular to the sliding direction of the tool storage seat (1051).

2. The gantry machine tool with quick tool changer according to claim 1, characterized in that, The lower end of the elastic claw (1055) is rounded on the side facing the axial line of the fixed shaft (1054); the shape of the lower frustum section is matched with the frustum section b of the tool handle.

3. The gantry machine tool having a quick tool changer according to claim 1, characterized in that, The mounting support is provided with a positioning assembly (106); the positioning assembly (106) is located inside the synchronous belt group (104).

4. The gantry machine tool having a quick tool changer according to claim 3, characterized in that, The positioning assembly (106) comprises a sliding seat (1061) arranged on the mounting support and sliding along the width direction of the machine tool frame; a driving component is arranged between the sliding seat (1061) and the mounting support for driving the sliding seat (1061) to move; The slide (1061) is provided with a positioning seat (1063) sliding along the length direction of the machine tool frame, the positioning seat (1063) is driven to move by a second linear module (1062) arranged on the slide (1061), and the positioning seat (1063) is provided with two inclined surfaces I on the side facing the machine tool machining center, the distance between the two inclined surfaces I increases along the sliding direction of the positioning seat (1063) and points to the machine tool machining center from the tool magazine (100); The tool storage seat (1051) is provided with two inclined surfaces II on the side facing the inner side of the ring rail (103), and the inclined surfaces II are parallel to the corresponding inclined surfaces I when the tool storage seat (1051) is located on the side of the positioning assembly (106) facing the machine tool machining center.

5. The gantry machine tool having a quick tool changer according to claim 4, wherein, The driving component comprises a rack (1064) arranged on the mounting bracket and a first motor (1065) arranged on the slide (1061), the output end of the first motor (1065) is provided with a gear, the gear is engaged with the rack (1064), and the extension direction of the rack (1064) is parallel to the width direction of the machine tool frame.

6. The gantry machine tool having a quick tool changer according to claim 4, wherein, The tool changing assembly (200) comprises a cross bracket (202) sliding in the vertical direction between the two column supports (102) and a third linear module (201) arranged on the column support (102) and used for driving the cross bracket (202) to move; The cross bracket (202) is provided with a first movable support (204) sliding along the width direction of the machine tool frame, and the first movable support (204) is driven to move by a fourth linear module (203) arranged on the cross bracket (202); The first movable support (204) is provided with a second movable support (206) sliding along the length direction of the machine tool frame, and the second movable support (206) is driven to move by a fifth linear module (205) arranged on the first movable support (204).

7. The gantry machine tool having a quick tool changer according to claim 6, wherein The overhanging end of the second movable support (206) is provided with a rotating shaft (208) arranged vertically and a second motor (207) used for driving the rotating shaft (208) to rotate, the upper end of the rotating shaft (208) is provided with a tool changing seat (209) arranged horizontally, and the two ends of the tool changing seat (209) are respectively provided with a tool changing claw (210), the tool changing claw (210) can be inserted into the ring groove c of the tool handle.

8. The gantry machine tool having a quick tool changer according to claim 7, wherein, The rotating shaft (208) is provided with an electromagnet (211), and the tool changing seat (209) and the tool changing claw (210) are made of magnetic materials.

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