A numerical control machine tool with a truss automatic tool changing and feeding

Abstract

This invention discloses a CNC machine tool with an automatic tool changer and loading / unloading system, belonging to the field of CNC machine tools. It includes an automatic tool changer and loading / unloading device, comprising a mounting frame and a four-position gripper. A truss assembly movable along the XYZ axes is fixedly mounted on the mounting frame. The four-position gripper is mounted on the truss assembly. A material bin is mounted on the mounting frame, and a tool magazine is located on one side of the material bin and mounted on the mounting frame. A machine tool processing area is located on one side of the automatic tool changer and loading / unloading device. The processing area includes a bed, an X-axis drive device, and a Z-axis drive device, both movably mounted on the bed. A grinding wheel tilting mechanism is mounted on the X-axis drive device, and a grinding wheel spindle is mounted on the grinding wheel tilting mechanism. A workpiece clamping mechanism is mounted on the Z-axis drive device, and a grinding wheel dresser is mounted on the workpiece clamping mechanism. This invention saves space and processing time, reducing operating costs.

Description

Technical Field

[0001] This invention belongs to the field of CNC machine tools, and more specifically, relates to a CNC machine tool with automatic tool changer and loading / unloading mechanism. Background Technology

[0002] During the operation of CNC machine tools, the complexity of machining parts often necessitates the use of multiple tools. In machining centers, tool magazines and tool arms are frequently used for frequent tool changes to meet the multi-tool requirements of milling. Grinding machines sometimes use tool magazines combined with the machine tool's own coordinate axes for tool changing, while other methods utilize articulated robots. Regarding loading and unloading, the rapid development of domestic industry in recent years has led to the mature application of various loading and unloading methods, with gantry robots being the primary choice for many manufacturers. In many machine tool processes requiring both automatic tool changing and automatic loading and unloading, the tool magazine and loading / unloading automation are often separated. Tool changing requires waiting for loading and unloading to complete, resulting in a relatively inefficient cycle time.

[0003] Most existing machine tools have separate tool magazines and automated loading / unloading systems. Tool changes require waiting for loading / unloading to complete, which is time-consuming. On most machine tools, the tool magazine is either a complex unit with motors or requires an additional articulated robot, which is relatively expensive. If the machine tool solution already has an automation system, adding another tool changing device or robot is relatively wasteful. Installing a tool magazine on a CNC machine tool requires certain requirements in terms of machine layout and space arrangement. The machine tool travel needs to reach a specific position, and the position of the tool spindle and surrounding structures must avoid interference during tool changes. Summary of the Invention

[0004] The main objective of this invention is to provide a CNC machine tool with an automatic tool changer and loading / unloading mechanism that integrates loading / unloading and tool changing. The tool magazine and material storage are also integrated, which greatly saves space and processing time, and reduces operating costs.

[0005] According to a first aspect of the present invention, a CNC machine tool with automatic tool changer and loading / unloading mechanism is provided, comprising:

[0006] An automatic tool changer and loading / unloading device includes a mounting frame and a four-station gripper. A truss assembly movable along the XYZ axis is fixedly mounted on the mounting frame. The four-station gripper is mounted on the truss assembly so that it can move along the XYZ axis. A hopper for placing workpiece blanks and finished workpieces is provided on the mounting frame. A tool magazine with cutting tools is provided on one side of the hopper. The tool magazine is mounted on the mounting frame.

[0007] The machine tool processing area is located on one side of the automatic tool changer and loading / unloading equipment. The machine tool processing area includes a bed, an X-axis drive device, and a Z-axis drive device. The X-axis drive device and the Z-axis drive device are both movably mounted on the bed. The X-axis drive device is equipped with a grinding wheel tilting mechanism, and the grinding wheel tilting mechanism is equipped with a grinding wheel spindle. The Z-axis drive device is equipped with a workpiece clamping mechanism, and the workpiece clamping mechanism is equipped with a grinding wheel dresser.

[0008] According to the first aspect of the present invention, the CNC machine tool with gantry automatic tool changer and loading / unloading mechanism includes a four-station gripper comprising a finished workpiece unloading gripper, a workpiece blank gripper, a tool loading gripper, a tool unloading gripper, and a flipping mechanism. The finished workpiece unloading gripper, the workpiece blank gripper, the tool loading gripper, and the tool unloading gripper are rotatably connected through the flipping mechanism. The finished workpiece unloading gripper and the workpiece blank gripper are arranged opposite to each other, and the tool loading gripper and the tool unloading gripper are arranged opposite to each other.

[0009] According to a first aspect embodiment of the present invention, the CNC machine tool with truss automatic tool changer and loading / unloading mechanism includes a rotating mechanism comprising a mounting bracket and a rotary cylinder. The mounting bracket is fixedly mounted on the truss assembly, and the rotary cylinder is fixedly mounted on the side of the mounting bracket away from the truss assembly. An assembly frame is fixedly mounted on the rotating end of the rotary cylinder. Two oppositely arranged clamping cylinders and two oppositely arranged tool clamping cylinders are mounted on the assembly frame. Each tool clamping cylinder is respectively disposed between two clamping cylinders. Three first clamping jaws are evenly distributed on the clamping cylinder. An elastic mechanism for receiving workpieces is provided between two adjacent first clamping jaws. Tool pick-and-place jaws are fixedly mounted on each tool clamping cylinder.

[0010] According to the first aspect of the present invention, the CNC machine tool with truss automatic tool changer and loading / unloading mechanism includes a receiving block and a connecting block. The outer side of the end of each clamping cylinder away from the assembly frame is fixedly connected to the connecting block. The connecting block is connected to the receiving block by a fixing bolt. An elastic element is sleeved on the outside of the fixing bolt. The elastic element is disposed between the receiving block and the connecting block to allow the receiving block to move along the length direction of the fixing bolt.

[0011] According to the first aspect of the present invention, the CNC machine tool with gantry automatic tool changer and loading / unloading mechanism is provided, wherein a workpiece positioning device is mounted on the mounting frame.

[0012] According to the first aspect of the present invention, in the CNC machine tool with gantry automatic tool changer and loading / unloading mechanism, the top of the tool magazine is lower than the top of the material bin.

[0013] According to the first aspect of the present invention, the CNC machine tool with gantry automatic tool changer and loading / unloading is provided, wherein the tool magazine is configured as a straight plate structure, and a plurality of tool placement slots are arranged in a linear array on the tool magazine.

[0014] According to a first aspect embodiment of the present invention, the CNC machine tool with truss automatic tool changer and loading / unloading assembly includes an X-axis guide rail, a Y-axis guide rail, and a Z-axis guide rail. Each of the X-axis, Y-axis, and Z-axis guide rails is connected to a guide rail drive motor. An X-axis slider is movably mounted on the X-axis guide rail, a Y-axis slider is movably mounted on the Y-axis guide rail, and a Z-axis slider is movably mounted on the Z-axis guide rail. A four-position gripper is mounted on the Y-axis slider. The Y-axis guide rail is mounted on the X-axis slider, and the X-axis guide rail is mounted on the Z-axis slider.

[0015] According to the first aspect of the present invention, the CNC machine tool with gantry automatic tool changer and loading / unloading device includes an X-axis drive device comprising an X-axis slide plate and an X-axis slide rail. The X-axis slide plate is movably disposed on the X-axis slide rail. A tool setting probe device is fixedly installed on the X-axis slide plate. The grinding wheel tilting mechanism is fixedly installed on the X-axis slide plate.

[0016] According to the first aspect of the present invention, the CNC machine tool with gantry automatic tool changer and loading / unloading mechanism includes a Z-axis drive device comprising a Z-axis slide plate and a Z-axis slide rail, wherein the Z-axis slide plate is movably disposed on the Z-axis slide rail, and the workpiece clamping mechanism is fixedly mounted on the Z-axis slide plate.

[0017] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0018] This invention combines loading / unloading and tool changing functions, enabling CNC machine tools to adapt to various processes without the need for additional tool changing devices. It solves the problem of loose cycle time caused by separate tool changing and loading / unloading in existing technologies, significantly improving production efficiency. It also eliminates the need to purchase multiple machine tools or tool changing equipment, reducing production investment. Furthermore, the integrated material storage and tool magazine reduce floor space requirements, enhance adaptability, and can be flexibly applied to various CNC machine tools without requiring large-scale machine tool modifications, thus reducing equipment deployment difficulty. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a schematic diagram of the structure of the CNC machine tool with automatic tool changer and loading / unloading mechanism in the first embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the four-station gripper in the first embodiment of the present invention;

[0022] Figure 3 This is a front view of the four-station gripper in the first embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of another perspective of the CNC machine tool with automatic tool changer and loading / unloading mechanism in the first embodiment of the present invention. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components, an indirect connection, or an interaction between two components.

[0029] The following disclosure provides many different implementations or examples for different ways of implementing the present invention.

[0030] Reference Figures 1 to 4 As shown, a CNC machine tool with automatic tool changer and loading / unloading mechanism is provided, comprising:

[0031] Automatic tool changer and loading / unloading equipment 1 includes a mounting frame 9 and a four-station gripper 11. A truss assembly 10 that can move along the XYZ axis is fixedly installed on the mounting frame 9. The four-station gripper 11 is installed on the truss assembly 10 so that the four-station gripper 11 can move along the XYZ axis. A hopper 12 for placing workpiece blanks and finished workpieces is provided on the mounting frame 9. A tool magazine 13 with cutting tools is provided on one side of the hopper 12. The tool magazine 13 is installed on the mounting frame 9.

[0032] Machine tool processing area 2 is located on one side of automatic tool changer and loading / unloading equipment 1. Machine tool processing area 2 includes bed 21, X-axis drive device 22 and Z-axis drive device 23. X-axis drive device 22 and Z-axis drive device 23 are movably mounted on bed 21. Grinding wheel tilting mechanism 6 is provided on X-axis drive device 22. Grinding wheel spindle 7 is mounted on grinding wheel tilting mechanism 6. Workpiece clamping mechanism 4 is provided on Z-axis drive device 23. Grinding wheel dresser 5 is provided on workpiece clamping mechanism 4.

[0033] In this embodiment, the gantry assembly 10 integrates the tool changing and material changing functions, enabling a single-spindle, single-station CNC machine tool to complete multi-process, multi-tool composite machining, making it suitable for various machine tools. A four-station gripper 11 is designed to perform tool changing and material changing operations simultaneously, reducing the time spent waiting for the grinding wheel spindle 7 to change tools after changing the workpiece material, thus improving machining efficiency. The tool magazine 13 and the material bin 12 are integrated, and the gantry assembly 10 is used for tool grabbing and unloading operations, making the tool holder placement method of the tool magazine 13 similar to the workpiece placement method. This eliminates the need for motors and other structures in commonly used complex tool magazines, simplifying the overall structure, reducing costs, and improving versatility. The automatic tool changing and loading / unloading equipment 1 integrates the gantry assembly 10, material bin 12, and tool magazine 13 into a single unit, resulting in a compact structure, small footprint, and applicability to various CNC machine tools.

[0034] Preferably, the grinding wheel tilting mechanism 6 can drive the grinding wheel spindle 7 to rotate, and the grinding wheel tilting mechanism 6, in conjunction with the grinding wheel dresser 5, can automatically correct the grinding wheel on the grinding wheel spindle 7.

[0035] In some embodiments of the present invention, the four-station gripper 11 includes a finished workpiece unloading gripper 111, a workpiece blank gripper 112, a tool loading gripper 113, a tool unloading gripper 114, and a flipping mechanism 115. The finished workpiece unloading gripper 111, the workpiece blank gripper 112, the tool loading gripper 113, and the tool unloading gripper 114 are rotatably connected by the flipping mechanism 115. The finished workpiece unloading gripper 111 and the workpiece blank gripper 112 are arranged opposite to each other, and the tool loading gripper 113 and the tool unloading gripper 114 are arranged opposite to each other. The tool loading gripper 113 and the tool unloading gripper 114 are respectively arranged between the finished workpiece unloading gripper 111 and the workpiece blank gripper 112, forming a four-station gripper.

[0036] In this embodiment, after the previous part is processed, the truss assembly 10 drives the four-station gripper 11 into the machine tool processing area 2, and the finished workpiece unloading gripper 111 unloads the finished part on the workpiece clamping mechanism 4; the flipping mechanism 115 rotates 180 degrees to complete the switching, and the workpiece blank gripper 112 loads the blank on the workpiece clamping mechanism 4; then, the tool unloading gripper 114 moves to the grinding wheel spindle 7 and unloads the inner hole grinding wheel and tool holder; the flipping mechanism 115 rotates 180 degrees again to switch, and the tool loading gripper 113 loads the rough grinding wheel onto the grinding wheel spindle 7, and the four-station gripper 11 exits the machine tool processing area 2. The tool probe device 8 begins to detect the position of the thread teeth. After detection, the machine tool processing area 2 starts the rough grinding of the internal thread. At the same time, the four-station gripper 11 moves to the material bin 12, the finished workpiece unloading gripper 111 places the finished part in place, and then moves to the tool magazine 13. The tool unloading gripper 114 places the removed internal grinding wheel and tool holder in place. The gripper flipping mechanism 115 rotates 180 degrees to switch, and the tool loading gripper 113 picks up the internal thread fine grinding wheel and tool holder, waiting outside the machine tool processing area 2. After the rough grinding of the internal thread is completed, the four-station gripper 11 enters the machine tool, the tool unloading gripper 114 removes the rough grinding wheel and tool holder; the flipping mechanism 115 rotates 180 degrees to switch, the tool loading gripper 113 installs the internal thread fine grinding wheel onto the grinding wheel spindle 7, the four-station gripper 11 exits the machine tool processing area 2, and the machine tool processing area 2 starts the internal thread fine grinding. During the internal thread finishing process, the four-station gripper 11 moves to the tool magazine 13, and the tool unloading gripper 114 places the rough grinding wheel and tool holder in place; the gripper flipping mechanism 115 rotates 180 degrees to switch, and the tool loading gripper 113 picks up the internal hole grinding wheel and tool holder, waiting outside the machine tool processing area 2. After the internal thread finishing process is completed, the four-station gripper 11 enters the machine tool, and the tool unloading gripper 114 removes the finishing grinding wheel and tool holder; the flipping mechanism 115 rotates 180 degrees to switch, and the tool loading gripper 113 installs the internal hole grinding wheel onto the grinding wheel spindle 7; the four-station gripper 11 exits the machine tool processing area 2, and the machine tool processing area 2 starts the internal hole grinding process. During internal hole grinding, the four-station gripper 11 moves to the tool magazine 13, where the tool unloading gripper 114 places the fine grinding wheel and tool holder in place. The gripper flipping mechanism 115 rotates 180 degrees to switch positions, and the tool loading gripper 113 picks up the rough grinding wheel and tool holder. It then moves to the material bin 12, where the workpiece blank gripper 11-2 picks up a blank and waits outside the machine tool processing area 2. After the hole grinding is completed, the above steps are repeated to achieve continuous automated machining of the parts. Because the four-station gripper 11 can perform tool changing and material changing operations simultaneously, the waiting time for the grinding wheel spindle 7 to change tools after workpiece material change is significantly reduced, effectively improving the machining cycle time.

[0037] In some embodiments of the present invention, the flipping mechanism 115 includes a mounting bracket 1151 and a rotary cylinder 1157. The mounting bracket 1151 is fixedly mounted on the truss assembly 10, and the rotary cylinder 1157 is fixedly mounted on the side of the mounting bracket 1151 away from the truss assembly 10. An assembly frame 1152 is fixedly mounted on the rotating end of the rotary cylinder 1157. Two oppositely arranged clamping cylinders 1158 and two oppositely arranged tool clamping cylinders 1159 are mounted on the assembly frame 1152. Each tool clamping cylinder 1159 is respectively arranged between two clamping cylinders 1158. Three first clamping claws 1156 are evenly distributed on the clamping cylinder 1158. An elastic mechanism 1154 for receiving workpieces is provided between two adjacent first clamping claws 1156. A tool pick-and-place claw 1153 is fixedly mounted on each tool clamping cylinder 1159. The rotary cylinder 1157 enables rapid and precise rotation of the assembly frame 1152, ensuring the switching accuracy of the four-station gripper 11. The clamping cylinder 1158, in conjunction with the elastic mechanism 1154, is used to clamp the workpiece. The three first clamping jaws 1156 can achieve stable clamping of the workpiece, and the elastic mechanism 1154 prevents the workpiece from being clamped to a very deep position, making the position of the workpiece clamped quite fixed each time, which is convenient for workpiece loading and unloading. The tool clamping cylinder 1159 drives the tool loading and unloading jaws 1153 to accurately clamp the tool, ensuring the stability of the tool loading and unloading process and avoiding tool deviation from affecting machining accuracy. The overall structure is reasonably designed, taking into account the clamping requirements of the workpiece and the tool, simplifying the gripper structure, reducing manufacturing costs, and improving the stability and accuracy of gripper operation.

[0038] Furthermore, the elastic mechanism 1154 includes a receiving block 1001 and a connecting block 1002. The outer side of the end of each clamping cylinder 1158 away from the assembly frame 1152 is fixedly connected to the connecting block 1002. The connecting block 1002 is connected to the receiving block 1001 by a fixing bolt 1003. An elastic element 1004 is sleeved on the outside of the fixing bolt 1003. The elastic element 1004 is disposed between the receiving block 1001 and the connecting block 1002 so that the receiving block 1001 can move along the length direction of the fixing bolt 1003. The receiving block 1001 is connected to the connecting block 1002 by the fixing bolt 1003. With the external elastic element 1004, the receiving block 1001 can move flexibly along the length of the fixing bolt 1003 to achieve elastic buffering during the clamping process. This ensures the stability of workpiece clamping, prevents workpiece slippage, and facilitates the picking and putting of workpieces. The elastic element can be adapted to workpieces of different sizes, improving the versatility of the gripper. At the same time, the structure is simple, easy to disassemble and maintain, and reduces the later equipment maintenance cost.

[0039] In some embodiments of the present invention, a workpiece positioning device 14 is installed on the mounting frame 9. The core function of the workpiece positioning device 14 is to pre-position and calibrate the posture of the workpiece. During the process of picking up or placing the workpiece, the workpiece positioning device 14 starts to operate, finding the empty position in the material bin 12 or the position of the workpiece blank, avoiding the positioning process from occupying the internal processing time of the machine tool processing area 2, effectively shortening the in-machine processing waiting time, improving the equipment utilization rate and overall production cycle, and working with gantry components, four-station grippers, material bins, tool magazines and other components to achieve continuous and efficient automated processing of CNC machine tools.

[0040] In some embodiments of the present invention, the top of the tool magazine 13 is lower than the top of the hopper 12, and the tool magazine 13 is located on one side of the hopper 12 to avoid interference during material handling; preferably, the tool magazine 13 and the working hopper 12 are separated from the hopper where workpieces are placed manually by front and rear baffles to ensure operational safety and structural rationality.

[0041] In some embodiments of the present invention, the tool magazine 13 is configured as a straight plate structure, with several tool placement slots arranged in a linear array on the tool magazine 13. The tool holders on the tools are all set upwards. The tool holders are arranged in a linear array, which is simple in structure. Compared with complex tool magazines, there is no need to configure drive components such as motors, which reduces manufacturing costs and maintenance difficulty. The upward setting of the tool holders is adapted to the picking and placing direction of the four-position gripper 11, which makes it easy for the tool loading gripper 113 and the tool unloading gripper 114 to quickly and accurately pick up the tools, reduce the action time of picking up and placing the tools, and at the same time facilitate the operator to replenish and replace the tools, thereby improving the operating efficiency of the equipment.

[0042] In some embodiments of the present invention, the truss assembly 10 includes an X-axis guide rail 101, a Y-axis guide rail 102, and a Z-axis guide rail 103. Each of the X-axis guide rail 101, Y-axis guide rail 102, and Z-axis guide rail 103 is connected to a guide rail drive motor. An X-axis slider is movably mounted on the X-axis guide rail 101, a Y-axis slider is movably mounted on the Y-axis guide rail 102, and a Z-axis slider is movably mounted on the Z-axis guide rail 103. A four-position gripper 11 is mounted on the Y-axis slider, the Y-axis guide rail 102 is mounted on the X-axis slider, and the X-axis guide rail 101 is mounted on the Z-axis slider. The X-axis, Y-axis, and Z-axis guide rails, in conjunction with their corresponding sliders and guide rail drive motors, enable the four-position gripper 11 to move smoothly and precisely along the XYZ axes, improving the gripper's positioning accuracy, ensuring the accuracy of tool changing and material changing actions, and reducing processing errors caused by gripper offset.

[0043] In some embodiments of the present invention, the X-axis drive device 22 includes an X-axis slide plate 221 and an X-axis slide rail 222. The X-axis slide plate 221 is movably mounted on the X-axis slide rail 222. A tool setting probe device 8 is fixedly mounted on the X-axis slide plate 221. A grinding wheel tilting mechanism 6 is fixedly mounted on the X-axis slide plate 221. The X-axis drive device 22 also includes an X-axis drive motor for driving the X-axis slide plate 221 to move, ensuring the movement accuracy of the grinding wheel tilting mechanism 6 and the tool setting probe device 8.

[0044] In some embodiments of the present invention, the Z-axis driving device 23 includes a Z-axis slide plate 231 and a Z-axis slide rail 232. The Z-axis slide plate 231 is movably mounted on the Z-axis slide rail 232, and the workpiece clamping mechanism 4 is fixedly mounted on the Z-axis slide plate 231. The Z-axis driving device 23 also includes a Z-axis driving motor for driving the Z-axis slide plate 231 to move, thereby driving the workpiece clamping mechanism 4 to move synchronously, so as to achieve precise alignment between the workpiece and the grinding wheel and ensure the positional accuracy of internal thread processing.

[0045] Preferably, the workpiece clamping mechanism 4 is provided with a workpiece spindle.

[0046] The bed 21 of the present invention adopts a flat bed structure, and the machine tool processing area 2 has four CNC coordinate axes X / Z / A / C, wherein the C axis is the workpiece rotation axis, the X axis is the grinding wheel spindle 7 forward and backward movement axis, the Z axis is the workpiece clamping mechanism 4 left and right movement axis, and the A axis is the grinding wheel tilting mechanism 6 tilting axis.

[0047] Encoders are installed on the X / Z / A / C axes of the machine tool to achieve closed-loop control of the coordinate axes. The workpiece spindle on the workpiece clamping mechanism 4, the grinding wheel spindle 7, and the dressing spindle on the grinding wheel dresser 5 are all electric spindles, and are cooled by a forced constant temperature cooling machine to ensure stable operation and high precision of the spindle, and the grinding wheel dressing amount can be automatically compensated.

[0048] The core function of the grinding wheel dresser 5 is to automatically dress the grinding wheel, ensuring the accuracy and stability of the grinding process. During long-term grinding, the surface abrasive grains of the grinding wheel gradually become dull and fall off, and may also become clogged with chips, causing the grinding wheel to lose its cutting ability and affecting the machining accuracy and surface roughness of the workpiece. The grinding wheel dresser 5 can work with the grinding wheel tilting mechanism 6 to automatically dress the grinding wheel, remove dull abrasive grains, clean clogged pores, restore the sharpness and standard shape of the grinding wheel, and at the same time realize automatic compensation of the grinding wheel dressing amount to ensure the consistency of the grinding process.

[0049] The above is a further detailed description of the present invention and should not be considered as a limitation on the specific implementation of the present invention. For those skilled in the art, simple deductions or substitutions without departing from the concept of the present invention are all within the protection scope of the present invention.

Claims

1. A numerical control machine tool with a truss automatic tool changing and feeding and discharging, characterized in that, include: Automatic tool changer and loading / unloading equipment (1), the automatic tool changer and loading / unloading equipment (1) includes a mounting frame (9) and a four-station gripper (11). A truss assembly (10) movable along the XYZ axis is fixedly installed on the mounting frame (9). The four-station gripper (11) is installed on the truss assembly (10) so that the four-station gripper (11) can move along the XYZ axis. A hopper (12) for placing workpiece blanks and finished workpieces is provided on the mounting frame (9). A tool magazine (13) with cutting tools is provided on one side of the hopper (12). The tool magazine (13) is installed on the mounting frame (9). The machine tool processing area (2) is located on one side of the automatic tool changer and loading / unloading equipment (1). The machine tool processing area (2) includes a bed (21), an X-axis drive device (22) and a Z-axis drive device (23). The X-axis drive device (22) and the Z-axis drive device (23) are movably mounted on the bed (21). The X-axis drive device (22) is equipped with a grinding wheel tilting mechanism (6). The grinding wheel tilting mechanism (6) is equipped with a grinding wheel spindle (7). The Z-axis drive device (23) is equipped with a workpiece clamping mechanism (4). The workpiece clamping mechanism (4) is equipped with a grinding wheel dresser (5).

2. The automatic tool changing and loading and unloading gantry NC machine tool according to claim 1, characterized in that, The four-station gripper (11) includes a finished workpiece unloading gripper (111), a workpiece blank gripper (112), a tool loading gripper (113), a tool unloading gripper (114), and a flipping mechanism (115). The finished workpiece unloading gripper (111), the workpiece blank gripper (112), the tool loading gripper (113), and the tool unloading gripper (114) are rotatably connected through the flipping mechanism (115). The finished workpiece unloading gripper (111) and the workpiece blank gripper (112) are arranged opposite to each other, and the tool loading gripper (113) and the tool unloading gripper (114) are arranged opposite to each other.

3. The automatic tool changing and loading and unloading gantry NC machine tool according to claim 2, characterized in that, The flipping mechanism (115) includes a mounting bracket (1151) and a rotary cylinder (1157). The mounting bracket (1151) is fixedly mounted on the truss assembly (10), and the rotary cylinder (1157) is fixedly mounted on the side of the mounting bracket (1151) away from the truss assembly (10). An assembly frame (1152) is fixedly mounted on the rotating end of the rotary cylinder (1157), and two oppositely arranged... The clamping cylinder (1158) and two opposing clamping cylinders (1159) are respectively arranged between the two clamping cylinders (1158). Three first clamping claws (1156) are evenly distributed on the clamping cylinder (1158). An elastic mechanism (1154) for receiving the workpiece is provided between two adjacent first clamping claws (1156). A tool picking and placing claw (1153) is fixedly installed on each clamping cylinder (1159).

4. The CNC machine tool with automatic tool changer and loading / unloading mechanism according to claim 3, characterized in that, The elastic mechanism (1154) includes a receiving block (1001) and a connecting block (1002). The outer side of the end of each clamping cylinder (1158) away from the assembly frame (1152) is fixedly connected to the connecting block (1002). The connecting block (1002) is connected to the receiving block (1001) by a fixing bolt (1003). An elastic element (1004) is sleeved on the outside of the fixing bolt (1003). The elastic element (1004) is disposed between the receiving block (1001) and the connecting block (1002) so that the receiving block (1001) can move along the length direction of the fixing bolt (1003).

5. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The mounting bracket (9) is equipped with a workpiece positioning device (14).

6. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The top of the tool magazine (13) is lower than the top of the hopper (12).

7. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The tool magazine (13) is configured as a straight plate structure, and a number of tool placement slots are arranged in a linear array on the tool magazine (13).

8. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The truss assembly (10) includes an X-axis guide rail (101), a Y-axis guide rail (102), and a Z-axis guide rail (103). Each of the X-axis guide rail (101), Y-axis guide rail (102), and Z-axis guide rail (103) is connected to a guide rail drive motor. An X-axis slider is movably mounted on the X-axis guide rail (101), a Y-axis slider is movably mounted on the Y-axis guide rail (102), and a Z-axis slider is movably mounted on the Z-axis guide rail (103). The four-position gripper (11) is mounted on the Y-axis slider, the Y-axis guide rail (102) is mounted on the X-axis slider, and the X-axis guide rail (101) is mounted on the Z-axis slider.

9. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The X-axis drive device (22) includes an X-axis slide plate (221) and an X-axis slide rail (222). The X-axis slide plate (221) is movably mounted on the X-axis slide rail (222). A tool setting probe device (8) is fixedly installed on the X-axis slide plate (221). The grinding wheel tilting mechanism (6) is fixedly installed on the X-axis slide plate (221).

10. The CNC machine tool with gantry automatic tool changer and loading / unloading as described in claim 1, characterized in that, The Z-axis drive device (23) includes a Z-axis slide plate (231) and a Z-axis slide rail (232). The Z-axis slide plate (231) is movably mounted on the Z-axis slide rail (232), and the workpiece clamping mechanism (4) is fixedly mounted on the Z-axis slide plate (231).

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