A tool changing device and a numerically controlled machine tool having the same

Abstract

The present invention discloses a tool changing device and a CNC machine tool having the same, comprising a tool storage part, a tool changing part and a tool magazine; the tool changing part is located between the tool storage part and the tool magazine; the tool changing part comprises a shifting block and a first driving device, the first driving device drives the shifting block to move between the tool storage part and the tool magazine; tool claws for fixing tools are provided at corresponding positions on the tool storage part and the tool magazine; a second driving device is provided between the tool changing part and the tool magazine, the second driving device drives the tool storage part to move closer to or away from the tool magazine. By providing the tool storage part and the tool changing part, the shifting block can quickly and accurately transfer the tool to the tool storage part, thereby improving the working efficiency and tool changing stability of the tool changing device; by providing the tool storage part and the tool magazine, the second driving device can quickly move the tool storage part to the corresponding position of the tool magazine, thereby ensuring that the tool magazine can store a large number of tools, and also improving the tool changing efficiency and ensuring the convenience of using the tool changing device.

Description

Technical Field

[0001] The invention relates to the field of machine tools, in particular to a tool changing device and a numerically controlled machine tool having the same. Background Art

[0002] With the miniaturization of machined parts, the processing of batch products has put forward requirements for CNC machine tools such as small footprint and low installation and maintenance costs. Therefore, in the production process, it is often necessary to equip a single CNC machine tool with multiple spindles for simultaneous processing, and the matching tool changing device also needs to be improved accordingly. Before the tool changing operation, the existing tool changing device needs to take out the tool head of the corresponding specification from the tool magazine, which increases the time required for tool changing and affects production efficiency. In addition, in order to shorten the tool changing time and shorten the distance between the electric spindle and the magazine, some tool changing devices have a structure that exposes the tools in the tool magazine to the working area, which makes the tools easily contaminated with debris, affecting the processing accuracy and service life of the CNC machine tool. Summary of the invention

[0003] To solve the above problems, the purpose of the present invention is to provide a tool changing device and a CNC machine tool having the same, so as to ensure the efficiency of tool changing, avoid the tool being contaminated by debris, and improve the production efficiency and processing accuracy of the CNC machine tool.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] The first aspect of the present invention is a tool changing device, comprising a tool storage part, a tool changing part and a tool magazine; the tool changing part is located between the tool storage part and the tool magazine; the tool changing part comprises a shift block and a first driving device, the first driving device drives the shift block to move between the tool storage part and the tool magazine; knife claws for fixing the tool are correspondingly provided on the tool storage part and the tool magazine; a second driving device is provided between the tool changing part and the tool magazine, the second driving device drives the tool storage part to move closer to or away from the tool magazine; specifically, the second driving device drives the tool storage part to move closer to the tool magazine, so that the knife claw on the tool storage part is aligned with the knife claw on the tool magazine, and then the first driving device drives the shift block to move between the tool storage part and the tool magazine, pulls the tool on the tool magazine out of the positioning groove and the clamping strip, and quickly transfers it to the tool storage part.

[0006] The above-mentioned tool changing device has at least the following beneficial effects: by setting the tool storage part and the tool changing part, the shift block can quickly and accurately transfer the tool to the tool storage part, thereby improving the working efficiency and tool changing stability of the tool changing device; by setting the tool storage part and the tool magazine, the second drive device can quickly move the tool storage part to the corresponding position of the tool magazine, thereby ensuring that the tool magazine can store a large number of tools, avoiding the need to store and retrieve tools from the tool magazine during each tool changing process, saving tool storage and retrieval time, and also improving tool changing efficiency, ensuring the ease of use of the tool changing device; at the same time, it also ensures the distance between the tool magazine and the tool changing part, thereby avoiding the tool from contaminating the tool magazine during the processing and affecting the processing accuracy.

[0007] Furthermore, the tool magazine is provided with a plurality of mutually parallel connecting rods; the knife claws are evenly distributed on the connecting rods. By providing the connecting rods, it is ensured that the knife claws can store the knives stably and orderly, and the knives are prevented from falling off, thereby improving the stability of the tool changing device.

[0008] Furthermore, grooves are provided between adjacent connecting rods; and the second driving device drives the knife storage portion to reciprocate along the length direction of the grooves.

[0009] Furthermore, the knife storage part is provided with the knife claws matched with the grooves; when the knife storage part is inserted into the grooves, the knife claws on the knife storage part are directly opposite to the knife claws on the tool magazine. By providing the grooves, the range of movement of the knife storage part and the tool changing part is expanded, ensuring that the knife claws on the knife storage part can store and access the knives in the knife claws on the tool magazine.

[0010] Furthermore, a positioning groove cooperating with the tool is provided in the knife claw, and a clamping strip is provided in the positioning groove. By providing the positioning groove and the clamping strip, the knife claw can stably clamp the tool, preventing the tool from falling off during the storage and retrieval process, ensuring that the shifting block can quickly and stably store and retrieve the tool, thereby improving the working efficiency of the tool changing device.

[0011] Furthermore, a movable block and a positioning hole are provided at the upper end of the knife storage part, and both ends of the movable block are inserted into the positioning hole and movably connected with the knife storage part. By providing the movable block and the positioning hole, the connection flexibility and positioning accuracy between the knife changing part and the knife storage part are improved, and displacement of the knife changing part is avoided.

[0012] Furthermore, a track is provided at the upper end of the tool changing part, and a clamping block is provided at the lower end of the movable block to cooperate with the track; the tool changing part is inserted into the track through the clamping block and is movably connected to the movable block. By providing the track and the clamping block, the connection stability and positioning accuracy between the tool changing part and the movable block are ensured, and the shifting block can quickly and stably store and retrieve the tool, thereby improving the stability of the tool changing device.

[0013] Furthermore, the driving ends of the first driving device and the second driving device are both provided with screw rods, and the tool storage unit and the tool magazine are both fixed with threaded holes that match the screw rods. By providing the screw rods and threaded holes, the positioning accuracy between the tool storage unit and the tool magazine, and between the tool storage unit and the tool changing unit is ensured, thereby improving the working efficiency of the tool changing device.

[0014] Furthermore, the first drive device and the second drive device are both stepper motors. Stepper motors have the advantages of high control accuracy, fast response speed and strong stability. The first drive device and the second drive device use stepper motors to effectively ensure the working efficiency and stability of the tool changing device.

[0015] The second aspect of the present invention is a CNC machine tool, comprising a base, a worktable and the tool changing device as described above; the tool storage unit and the worktable are both movably arranged on the base; a plurality of electric spindles are also movably arranged on the base; the second drive device drives the tool changing unit to reciprocate between the tool magazine and the electric spindle.

[0016] The beneficial effects of the above-mentioned CNC machine tool are as follows: by setting the tool storage part and the tool changing part, the shift block can quickly and accurately transfer the tool to the tool storage part, thereby improving the working efficiency and tool changing stability of the CNC machine tool; by setting the tool storage part and the tool magazine, the second drive device can quickly move the tool storage part to the corresponding position of the tool magazine, thereby ensuring that the tool magazine can store a large number of tools, avoiding the need to store and retrieve tools from the tool magazine during each tool change process, saving tool storage and retrieval time, and also improving tool changing efficiency, ensuring the ease of use of the CNC machine tool, while also ensuring the distance between the tool magazine and the electric spindle, thereby avoiding the electric spindle from contaminating the tool on the tool magazine during the machining process and affecting the machining accuracy; by setting the electric spindle and the workbench, the electric spindle can perform a quick tool change operation and then process the workpiece on the workbench, thereby improving the production efficiency and machining accuracy of the CNC machine tool.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic structural diagram of a tool changing device according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of a tool changing device according to an embodiment of the present invention from another angle;

[0021] Figure 3 for Figure 1Enlarged view of part A in the middle;

[0022] Figure 4 for Figure 1 A magnified view of the structure of the middle blade claw;

[0023] Figure 5 This is a schematic structural diagram of a CNC machine tool according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic structural diagram of a CNC machine tool according to an embodiment of the present invention from another angle;

[0025] Figure 7 A side view of a CNC machine tool in a tool storage state according to an embodiment of the present invention;

[0026] Figure 8 The figure is a side view of a CNC machine tool in a tool changing state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] Reference Figures 1 to 4 An embodiment of the present invention provides a tool changing device, comprising a tool storage part 100, a tool changing part 200 and a tool magazine 300; the tool changing part 200 is located between the tool storage part 100 and the tool magazine 300; the tool changing part 200 comprises a shift block 210 and a first driving device 220, the first driving device 220 drives the shift block 210 to move between the tool storage part 100 and the tool magazine 300; tool claws 110 for fixing a tool 600 are correspondingly provided on the tool storage part 100 and the tool magazine 300; a second driving device 250 is provided between the tool changing part 200 and the tool magazine 300, the second driving device 250 drives the tool storage part 100 to move close to or away from the tool magazine 300.

[0029] By setting the tool storage part 100 and the tool changing part 200, the shift block 210 can quickly and accurately transfer the tool 600 to the tool storage part 100, thereby improving the working efficiency and tool changing stability of the tool changing device; by setting the tool storage part 100 and the tool magazine 300, the second drive device 250 can quickly move the tool storage part 100 to the corresponding position of the tool magazine 300, thereby ensuring that the tool magazine 300 can store a large number of tools 600, thereby improving the tool changing efficiency and ensuring the ease of use of the tool changing device; at the same time, the distance between the tool magazine 300 and the tool changing part 200 is also ensured, thereby preventing the tool 600 from contaminating the tool magazine 300 during the processing and affecting the processing accuracy.

[0030] In another embodiment, the tool magazine 300 is provided with a plurality of mutually parallel connecting rods 310; the knife claws 110 are evenly distributed on the connecting rods 310. By providing the connecting rods 310, it is ensured that the knife claws 110 can store the knives 600 stably and orderly, and the knives 600 are prevented from falling off, thereby improving the stability of the tool changing device.

[0031] In another embodiment, a groove 320 is provided between adjacent connecting rods 310 ; and the second driving device 250 drives the knife storage portion 100 to reciprocate along the length direction of the groove 320 .

[0032] In another embodiment, the knife storage part 100 is provided with the knife claw 110 matched with the groove 320; when the knife storage part 100 is inserted into the groove 320, the knife claw 110 on the knife storage part 100 is directly opposite to the knife claw 110 on the tool magazine 300. By providing the groove 320, the range of movement of the knife storage part 100 and the tool changing part 200 is expanded, ensuring that the knife claw 110 on the knife storage part 100 can store and access the knives 600 in the respective knife claws 110 on the tool magazine 300.

[0033] Reference Figure 4 In another embodiment, the knife claw 110 is provided with a positioning groove 111 matched with the knife 600, and the positioning groove 111 is provided with a clamping strip 112. By providing the positioning groove 111 and the clamping strip 112, the knife claw 110 can stably clamp the knife 600, prevent the knife 600 from falling off during the access process, ensure that the shifting block 210 can quickly and stably access the knife 600, and improve the working efficiency of the tool changing device.

[0034] Reference Figure 3 In another embodiment, a movable block 120 and a positioning hole 130 are provided at the upper end of the knife storage part 100, and both ends of the movable block 120 are inserted into the positioning hole 130 to be movably connected with the knife storage part 100. By providing the movable block 120 and the positioning hole 130, the connection flexibility and positioning accuracy between the knife changing part 200 and the knife storage part 100 are improved, and the displacement of the knife changing part 200 is avoided.

[0035] In another embodiment, the upper end of the tool changing part 200 is provided with a track 230, and the lower end of the movable block 120 is provided with a clamping block 121 that cooperates with the track 230; the tool changing part 200 is inserted into the track 230 through the clamping block 121 to be movably connected with the movable block 120. By providing the track 230 and the clamping block 121, the connection stability and positioning accuracy between the tool changing part 200 and the movable block 120 are ensured, and the shifting block 210 is ensured to quickly and stably store and retrieve the tool 600, thereby improving the stability of the tool changing device.

[0036] In another embodiment, the driving ends of the first driving device 220 and the second driving device 250 are both provided with a screw rod 260, and the tool storage unit 100 and the tool magazine 300 are both fixed with a threaded hole 270 that matches the screw rod 260. By providing the screw rod 260 and the threaded hole 270, the positioning accuracy between the tool storage unit 100 and the tool magazine 300, and between the tool storage unit 100 and the tool changing unit 200 is ensured, thereby improving the working efficiency of the tool changing device.

[0037] In another embodiment, both the first driving device 220 and the second driving device 250 are stepper motors. Stepper motors have the advantages of high control accuracy, fast response speed, and strong stability. The first driving device 220 and the second driving device 250 use stepper motors to effectively ensure the working efficiency and stability of the tool changing device.

[0038] Reference Figures 5 to 8 The embodiment of the present invention further provides a CNC machine tool, comprising a base 400, a workbench 500 and the tool changing device as described above; the tool storage unit 100 and the workbench 500 are both movably arranged on the base 400; a plurality of electric spindles 410 are also movably arranged on the base 400; the second driving device 250 drives the tool changing unit 200 to reciprocate between the tool magazine 300 and the electric spindle 410.

[0039] The working principle of the present invention is further described below.

[0040] Before use, first place a tool 600 of corresponding size and specification in the tool claw 110 on the tool magazine 300. Through the positioning groove 111 and the clamping strip 112, the tool 600 can be stably clamped in the tool claw 110; then install the connecting rod 310, the tool storage part 100 and the tool changing part 200 on the base 400, and adjust the position of the electric spindle 410 to ensure that when the tool storage part 100 moves to the side away from the tool magazine 300, the electric spindle 41 is directly opposite to the tool claw 110 on the tool storage part 100; place the workpiece to be processed on the workbench 500. During use, the second driving device 250 drives the tool storage part 100 to move close to the tool magazine 300, so that the knife claw 110 on the tool storage part 100 is aligned with the knife claw 110 on the tool magazine 300, and the first driving device 220 drives the shifting block 210 to move between the tool storage part 100 and the tool magazine 300, and pulls the tool 600 on the tool magazine 300 out of the positioning groove 111 and the card strip 112, and quickly transfers it to the tool storage part 100. At this time, the CNC machine tool is in a state as shown in FIG. Figure 7The tool storage state shown; then the first drive device 220 drives the shift block 210 to reset, and the second drive device 250 drives the tool storage unit 100 to move away from the tool magazine 300 until the knife claw 110 on the tool storage unit 100 is directly opposite to the electric spindle 410; the electric spindle 410 moves downward, and if there is a tool 600 in the electric spindle 410, the electric spindle 410 moves to the vacant knife claw 110, otherwise, the electric spindle 410 directly moves to the knife claw 110 with the tool 600, and performs the tool change operation. At this time, the CNC machine tool is in a state as shown in FIG. Figure 8 The tool changing state is shown. After the electric spindle 410 changes the tool 600, the second drive device 250 drives the tool storage unit 100 to move close to the tool magazine 300, and the tool storage unit 100 is inserted into the groove 320 to prevent debris from affecting the tool 600 on the tool claw 110; then the electric spindle 410 processes the workpiece on the workbench 500. Since there are multiple tool storage units 100, and each tool storage unit 100 has multiple tool claws 110, multiple electric spindles 410 can perform tool changing operations at the same time; in addition, during the tool changing process, the electric spindle 410 directly replaces the tool 600 on the tool storage unit 100, saving the time of storing and retrieving the tool 600 from the tool magazine 300 each time, greatly improving the tool changing efficiency of the CNC machine tool. The tool changing unit 200 is inserted into the track 230 through the clamping block 121 and is movably connected to the movable block 120. The first driving device 220 and the second driving device 250 drive the shifting block 210 and the tool storage unit 100 to move through the screw rod 260, thereby further improving the positioning accuracy of the shifting block 210 and the tool storage unit 100, ensuring that the tool 600 can be replaced and accessed quickly, efficiently and accurately, thereby improving the working efficiency and machining accuracy of the CNC machine tool.

[0041] From the above description, it can be seen that the tool changing device of the present invention and the CNC machine tool having the same can quickly and accurately transfer the tool 600 to the tool storage part 100 by setting the tool storage part 100 and the tool changing part 200, thereby improving the working efficiency and tool changing stability of the CNC machine tool; by setting the tool storage part 100 and the tool magazine 300, the second drive device 250 can quickly move the tool storage part 100 to the corresponding position of the tool magazine 300, ensuring that the tool magazine 300 can store a large number of tools 600, avoiding the need to remove tools from the tool magazine during each tool change process. The tool 600 is stored and retrieved on the tool magazine 300, which saves the access time of the tool 600, improves the tool changing efficiency, ensures the convenience of using the CNC machine tool, and also ensures the distance between the tool magazine 300 and the electric spindle 410, so as to avoid the electric spindle 410 causing contamination to the tool 600 on the tool magazine 300 during the processing, thereby affecting the processing accuracy; by setting the electric spindle 410 and the workbench 500, the electric spindle 410 can perform a quick tool change operation and then process the workpiece on the workbench 500, thereby improving the production efficiency and processing accuracy of the CNC machine tool.

[0042] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A tool changing device, It is characterized in that The tool storage unit comprises a tool storage portion, a tool changing portion and a tool magazine; the tool changing portion is located between the tool storage portion and the tool magazine; the tool changing portion comprises a shifting block and a first driving device, the first driving device driving the shifting block to move between the tool storage portion and the tool magazine; knife claws for fixing the tool are provided at positions corresponding to the positions on the tool storage portion and the tool magazine, the knife claws are provided with positioning grooves that cooperate with the tool, and the positioning grooves are provided with card strips; a second driving device is provided between the tool changing portion and the tool magazine, the second driving device drives the tool storage portion to move close to or away from the tool magazine; specifically, the second driving device drives the tool storage portion to move close to the tool magazine, so that the knife claws on the tool storage portion and the knife claws on the tool magazine are in the correct position After alignment, the first driving device drives the shifting block to move between the tool storage part and the tool magazine, pulls the tool on the tool magazine out of the positioning groove and the clamping strip, and quickly transfers it to the tool storage part; a movable block is provided at the upper end of the tool storage part, a track is provided at the upper end of the tool changing part, and a clamping block matching the track is provided at the lower end of the movable block; the tool changing part is inserted into the track through the clamping block and is movably connected with the movable block; screw rods are provided on the driving ends of the first driving device and the second driving device, and threaded holes matching the screw rods are fixed on the tool storage part and the tool magazine; the first driving device and the second driving device respectively drive the shifting block and the tool storage part to move through the screw rods.

2. A tool changing device according to claim 1, It is characterized in that The tool magazine is provided with a plurality of mutually parallel connecting rods; the knife claws are evenly distributed on the connecting rods.

3. A tool changing device according to claim 2, It is characterized in that A groove is provided between adjacent connecting rods; and the second driving device drives the knife storage part to reciprocate along the length direction of the groove.

4. A tool changing device according to claim 3, It is characterized in that The knife storage part is provided with the knife claw matched with the groove; when the knife storage part is inserted into the groove, the knife claw on the knife storage part is directly opposite to the knife claw on the tool magazine.

5. A tool changing device according to claim 1, It is characterized in that A positioning hole is provided at the upper end of the knife storage portion, and two ends of the movable block are inserted into the positioning hole and movably connected with the knife storage portion.

6. A tool changing device according to claim 5, It is characterized in that The first driving device and the second driving device are both stepping motors.

7. A CNC machine tool, It is characterized in that It comprises a base, a workbench and a tool changing device as claimed in any one of claims 1 to 6; the tool storage unit and the workbench are both movably arranged on the base; a plurality of electric spindles are also movably arranged on the base; the second driving device drives the tool changing unit to reciprocate between the tool magazine and the electric spindle.

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