A tool changing device for CNC machine tools

Abstract

This invention relates to a tool changing device, specifically an auxiliary tool changing device for CNC machine tools. The device includes a head, a spindle, an external hexagonal extrusion frame, a clamping member, a cutting tool, a connecting mechanism, and an extrusion mechanism. The spindle is housed within the head, and the external hexagonal extrusion frame is threadedly connected to its lower outer part. The clamping member is installed within the spindle, holding the cutting tool within it. The connecting mechanism is mounted on the machine tool, and the extrusion mechanism is located between the head and the connecting mechanism. When changing tools on a CNC machine tool, this invention only requires controlling the spindle to move the external hexagonal extrusion frame into the internal hexagonal sleeve. This allows control of the drive motor to operate, controlling the clamping member to release and clamp the cutting tool, eliminating the need for manual release and clamping. This makes operation more convenient and improves tool loading efficiency.

Description

Technical Field

[0001] This invention relates to a tool changing device, specifically an auxiliary tool changing device for CNC machine tools. Background Technology

[0002] With the continuous advancement of modern manufacturing, CNC machine tools, with their high precision, high efficiency, and excellent automation performance, have become core equipment in the field of machining, widely used in high-requirement industries such as aerospace, automobile manufacturing, precision molds, and electronic components. In actual machining processes, to complete multiple operations such as drilling, milling, tapping, and boring, a single CNC machine tool often needs to use multiple cutting tools for continuous operation. Therefore, tool changes are frequently required for CNC machine tools.

[0003] Currently, most small and medium-sized enterprises still use semi-automatic CNC equipment. When changing tools, they mainly rely on manual operation by the operator to loosen the clamping parts, remove the tool, and then replace it with a new tool to complete the tool disassembly and installation. This manual tool changing method is not only cumbersome and time-consuming, but also prone to problems such as inaccurate tool installation, reversed tool installation, or loosening due to operational errors, which pose certain safety hazards and affect machining accuracy and production safety. Summary of the Invention

[0004] In view of this, the present invention provides an auxiliary tool changing device for CNC machine tools.

[0005] Technical solution: A CNC machine tool auxiliary tool changing device includes a head, a spindle, an external hexagonal extrusion frame, a clamping component, a cutting tool, a connecting mechanism, and an extrusion mechanism. The spindle is installed inside the head, and the external hexagonal extrusion frame is threadedly connected to the lower part of the spindle. The clamping component is installed inside the spindle, and the cutting tool is clamped inside the clamping component. The connecting mechanism is installed on the machine tool, and the extrusion mechanism is provided between the head and the connecting mechanism.

[0006] Furthermore, it is particularly preferred that the connecting mechanism includes a guide sleeve, an outer sleeve, an elastic element one, an elastic element two, a connecting seat, and an internal hexagonal sleeve. The connecting seat is mounted on the machine tool, and the outer sleeve is connected to the connecting seat. The guide sleeve is connected to the upper part of the outer sleeve, and the internal hexagonal sleeve is slidably and rotatably connected inside the outer sleeve. An elastic element one is connected between the internal hexagonal sleeve and the outer sleeve, and an elastic element two is connected between the guide sleeve and the outer sleeve. The internal hexagonal sleeve can be fitted onto the external hexagonal extrusion frame.

[0007] Furthermore, it is particularly preferred that the bottom of the internal hexagonal sleeve is evenly spaced with multiple locking shafts, the bottom of the locking shafts is tapered, and the upper part of the guide sleeve is evenly spaced with multiple locking grooves, and the locking shafts can be inserted into the locking grooves when they move down.

[0008] Furthermore, it is particularly preferred that the extrusion mechanism includes a lower pressure sleeve and an extrusion shaft, the lower pressure sleeve is connected to the bottom of the die head, a plurality of extrusion shafts are evenly spaced at the bottom of the lower pressure sleeve, and a plurality of inclined grooves are evenly spaced at the upper part of the outer sleeve, the number of inclined grooves being the same as the number of extrusion shafts, and the inclined grooves being located below the extrusion shafts.

[0009] Furthermore, it is particularly preferred that the device also includes a drive mechanism, which includes an external gear ring, a drive motor, and a drive gear. The drive motor is mounted on the connecting seat, and the output shaft of the drive motor is connected to a drive gear. An external gear ring is connected to the lower outer part of the outer sleeve, and the external gear ring meshes with the drive gear.

[0010] Furthermore, it is particularly preferred that the sleeve also includes a connecting sleeve, the top of which is connected to the hexagonal sleeve, and the connecting sleeve has a guide groove, which is hexagonal.

[0011] Furthermore, it is particularly preferred that the device also includes a feeding mechanism, which comprises a feeding sleeve, a base plate, a stepper motor, a feeding sleeve, an outer cylinder, and a drive assembly. The bottom of the connecting seat is connected to the base plate, and the feeding sleeve is rotatably connected to the top of the base plate. A stepper motor is mounted on the base plate, and the output shaft of the stepper motor rotates with the feeding sleeve. Multiple feeding sleeves are slidably connected to the outer side of the feeding sleeve at uniform intervals along the circumference. The top of the base plate is connected to the outer cylinder, which is sleeved between the outer sides of the multiple feeding sleeves. A drive assembly is provided between the base plate and the feeding sleeve.

[0012] Furthermore, it is particularly preferred that the drive assembly includes a transmission gear, a connecting gear, a threaded rod, and a servo motor. Multiple threaded rods are rotatably connected to the outer side of the feeding sleeve at uniform intervals along the circumference. The threaded rods are threadedly engaged with the feeding sleeve. A transmission gear is connected to the bottom of the threaded rod. A servo motor is mounted on the base plate. A connecting gear is connected to the output shaft of the servo motor. The transmission gear can move to mesh with the connecting gear.

[0013] In addition, it is particularly preferred that the feed sleeve also includes wedge blocks, with multiple wedge blocks evenly spaced circumferentially connected in the upper part of each feed sleeve.

[0014] 1. When performing tool changing on a CNC machine tool, this invention only requires controlling the spindle to move the external hexagonal extrusion frame into the internal hexagonal sleeve. This allows the drive motor to operate and control the clamping components to loosen and clamp the cutting tool, eliminating the need for manual loosening and clamping of the cutting tool. This makes operation more convenient and improves tool loading efficiency.

[0015] 2. When performing tool changing, this invention can control a servo motor to drive the threaded rod to rotate, thereby driving the feeding sleeve to move up and down, which in turn drives the cutting tool to move up and down, feeding different cutting tools into the clamping part, so as to achieve the effect of automatic cutting tool changing without manual replacement, making the operation more convenient. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection mechanism, extrusion mechanism and drive mechanism of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection mechanism of the present invention.

[0020] Figure 5 This is an exploded view of the connecting mechanism, extrusion mechanism, and driving mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the connecting sleeve of the present invention.

[0022] Figure 7 This is a schematic diagram of the connecting sleeve and the internal hexagonal sleeve of the present invention.

[0023] Figure 8 This is a schematic diagram of the first structure of the feeding mechanism of the present invention.

[0024] Figure 9 This is a schematic diagram of a second structure of the feeding mechanism of the present invention.

[0025] Figure 10 This is a schematic diagram of the third structure of the feeding mechanism of the present invention.

[0026] Figure 11 This is a schematic diagram of the feeding sleeve and wedge block of the present invention.

[0027] In the diagram: 1. Machine head, 2. Main shaft, 3. External hexagonal extrusion frame, 4. Clamping component, 5. Cutting blade, 6. Internal hexagonal sleeve, 61. Locking shaft, 71. Guide sleeve, 72. Outer sleeve, 73. Elastic component one, 74. Elastic component two, 75. Connecting seat, 81. External gear ring, 82. Drive motor, 83. Drive gear, 84. Lower pressure sleeve, 85. Extrusion shaft, 91. Connecting sleeve, 101. Feeding sleeve, 102. Base plate, 103. Stepper motor, 104. Feeding sleeve, 105. Threaded rod, 106. Transmission gear, 107. Connecting gear, 108. Servo motor, 109. Outer cylinder, 11. Wedge block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0029] A CNC machine tool auxiliary tool changing device, such as Figures 1-5 As shown, the machine includes a machine head 1, a spindle 2, an external hexagonal extrusion frame 3, a clamping member 4, a cutting tool 5, a connecting mechanism, and an extrusion mechanism. The spindle 2 is installed inside the machine head 1. The external hexagonal extrusion frame 3 is threadedly connected to the lower part of the spindle 2. The clamping member 4 is installed inside the spindle 2, and the cutting tool 5 is clamped inside the clamping member 4. The above are all prior art and will not be described in detail in this embodiment. The connecting mechanism is installed on the machine tool, and the extrusion mechanism is provided between the machine head 1 and the connecting mechanism.

[0030] like Figures 2-5 As shown, the connecting mechanism includes a guide sleeve 71, an outer sleeve 72, an elastic element 73, an elastic element 74, a connecting seat 75, and an internal hexagonal sleeve 6. The connecting seat 75 is mounted on the machine tool, and the outer sleeve 72 is connected to the connecting seat 75. The guide sleeve 71 is connected to the upper part of the outer sleeve 72. The internal hexagonal sleeve 6 is slidably and rotatably connected inside the outer sleeve 72. An elastic element 73, which is a connecting spring, is connected between the internal hexagonal sleeve 6 and the outer sleeve 72. An elastic element 74, which is a compression spring, is connected between the guide sleeve 71 and the outer sleeve 72. The internal hexagonal sleeve 6 can be fitted onto the external hexagonal extrusion frame 3.

[0031] like Figure 4 As shown, the bottom of the internal hexagonal sleeve 6 is evenly spaced with multiple locking shafts 61. The bottom of the locking shaft 61 is tapered. The upper part of the guide sleeve 71 is evenly spaced with multiple locking grooves. The locking shaft 61 can be inserted into the locking groove when it moves down.

[0032] like Figures 2-5 As shown, the extrusion mechanism includes a lower pressure sleeve 84 and an extrusion shaft 85. The lower pressure sleeve 84 is connected to the bottom of the die head 1. Multiple extrusion shafts 85 are evenly spaced at the bottom of the lower pressure sleeve 84. Multiple inclined grooves are evenly spaced on the upper part of the outer sleeve 72. The number of inclined grooves is the same as the number of extrusion shafts 85. The inclined grooves are located below the extrusion shafts 85 so that when the extrusion shafts 85 move down, they can contact the inclined grooves and extrude the inclined grooves to move.

[0033] like Figures 2-5As shown, it also includes a drive mechanism, which includes an external gear ring 81, a drive motor 82, and a drive gear 83. The drive motor 82 is mounted on the right side of the connecting seat 75, and the drive gear 83 is connected to the output shaft of the drive motor 82. The external gear ring 81 is connected to the lower outer part of the outer sleeve 72. The external gear ring 81 meshes with the drive gear 83 so that the operation of the drive motor 82 can drive the outer sleeve 72 to rotate through the drive gear 83 and the external gear ring 81.

[0034] When a tool changer is required on a CNC machine tool, this tool changer can be used. When using this device for tool changing, first control the machine head 1 to move above the internal hexagonal sleeve 6, then control the machine head 1 to move downwards. As the machine head 1 moves downwards, it will drive the external hexagonal extrusion frame 3 and the lower pressure sleeve 84 downwards. The downward movement of the lower pressure sleeve 84 can drive the extrusion shaft 85 downwards. As the external hexagonal extrusion frame 3 moves downwards, it will move into the internal hexagonal sleeve 6. Then, the external hexagonal extrusion frame 3 will move downwards to the bottom of the internal hexagonal sleeve 6. At this point, if the external hexagonal extrusion frame 3 continues to move downwards, it can drive the extrusion shaft 85 downwards. As the internal hexagonal socket 6 moves downward, it drives the locking shaft 61 to move downward and insert into the locking groove. The elastic element 73 is compressed, thus locking the internal hexagonal socket 6 and the guide sleeve 71 together. At this time, the extrusion shaft 85 also moves to contact the inclined groove. Subsequently, the machine head 1 continues to move downward, which will compress the external hexagonal extrusion frame 3, the internal hexagonal socket 6, and the guide sleeve 71 downward. The elastic element 74 is compressed, and simultaneously, the downward movement of the extrusion shaft 85 compresses the inclined groove, thereby driving the outer sleeve 72 to rotate. The rotation of the outer sleeve 72 drives the outer sleeve 72 and... The internal hex socket 6 rotates, which in turn drives the external hexagonal extrusion frame 3 to rotate, thus loosening the external hexagonal extrusion frame 3. After loosening, the drive motor 82 is controlled to operate, driving the drive gear 83 to rotate. The drive gear 83, in turn, drives the external gear ring 81 to rotate, which in turn drives the outer sleeve 72 to rotate, thus loosening the external hexagonal extrusion frame 3 again. When the external hexagonal extrusion frame 3 is loosened, it will move down and no longer press the clamping member 4. At this time, the clamping member 4 releases the cutting tool 5. Then, the cutting blade 5 can be directly removed and a new cutting blade 5 can be inserted. Then, the drive motor 82 is controlled to drive the drive gear 83 to rotate in the opposite direction. When the drive gear 83 rotates in the opposite direction, it can drive the outer gear ring 81 to rotate in the opposite direction, thereby driving the outer sleeve 72 to rotate in the opposite direction. This causes the outer hexagonal extrusion frame 3 to move upward and drive the clamping member 4 to fix the cutting blade 5. In this way, the cutting blade 5 can be changed using this tool changing device. During the tool changing, the cutting blade 5 can be automatically released and clamped without manual operation, making the operation more convenient.

[0035] like Figure 6 and Figure 7As shown, it also includes a connecting sleeve 91. The top of the internal hexagonal sleeve 6 is connected to the connecting sleeve 91. The connecting sleeve 91 has a guide groove. The guide groove is hexagonal. When the external hexagonal extrusion frame 3 moves onto the guide sleeve, it can squeeze the connecting sleeve 91 to rotate through the guide groove, thereby driving the internal hexagonal sleeve 6 to rotate, so that the internal hexagonal sleeve 6 is aligned with the hexagonal position of the external hexagonal extrusion frame 3.

[0036] When the external hexagonal extrusion bracket 3 moves down, it can contact the guide groove. If the six corners of the external hexagonal extrusion bracket 3 and the internal hexagonal sleeve 6 are not aligned with each other, the guide groove can be squeezed to make the internal hexagonal sleeve 6 rotate. When the internal hexagonal sleeve 6 rotates, it can be aligned with the six corners of the external hexagonal extrusion bracket 3, so that the external hexagonal extrusion bracket 3 can be smoothly inserted into the internal hexagonal sleeve 6 when it moves down.

[0037] like Figures 8-10 As shown, it also includes a feeding mechanism, which includes a feeding sleeve 101, a base plate 102, a stepper motor 103, a feeding sleeve 104, an outer cylinder 109, and a driving assembly. The bottom of the connecting seat 75 is connected to the base plate 102. The feeding sleeve 101 is rotatably connected to the top left side of the base plate 102. The stepper motor 103 is installed on the left side of the base plate 102. The output shaft of the stepper motor 103 rotates with the feeding sleeve 101 so that the stepper motor 103 can drive the feeding sleeve 101 to rotate. Multiple feeding sleeves 104 are slidably connected to the outer side of the feeding sleeve 101 at uniform intervals along the circumference. The feeding sleeves 104 can slide up and down along the feeding sleeve 101. The outer cylinder 109 is connected to the top left side of the base plate 102. The outer cylinder 109 is sleeved between the outer sides of the multiple feeding sleeves 104. A driving assembly is provided between the base plate 102 and the feeding sleeve 101.

[0038] like Figures 8-10 As shown, the drive assembly includes a transmission gear 106, a connecting gear 107, a threaded rod 105, and a servo motor 108. Multiple threaded rods 105 are rotatably connected to the outer side of the feeding sleeve 101 at uniform intervals along the circumference. The threaded rods 105 are threadedly engaged with the feeding sleeve 104, allowing the rotation of the threaded rods 105 to drive the feeding sleeve 104 up and down via the threads. A transmission gear 106 is connected to the bottom of each threaded rod 105. A servo motor 108 is mounted on the left side of the base plate 102. A connecting gear 107 is connected to the output shaft of the servo motor 108. The transmission gear 106 can move to mesh with the connecting gear 107. When the transmission gear 106 meshes with the connecting gear 107, the servo motor 108 can be controlled to rotate, driving the connecting gear 107 to rotate via the transmission gear 106.

[0039] When releasing the cutting blade 5, the servo motor 108 can be controlled to drive the connecting gear 107 to rotate. When the connecting gear 107 rotates, it drives the threaded rod 105 to rotate via the transmission gear 106. When the threaded rod 105 rotates, it drives the feeding sleeve 104 to move upwards via the thread. After the feeding sleeve 104 moves upwards, the cutting blade 5 is released and falls onto the feeding sleeve 104, where it is collected. Then, the servo motor 108 is controlled to drive the connecting gear 107 to rotate in the opposite direction. When the connecting gear 107 rotates in the opposite direction, it drives the threaded rod 105 via the transmission gear 106. 5. Reverse rotation causes the feeding sleeve 104 to move downwards. After the feeding sleeve 104 moves downwards, the stepper motor 103 can be controlled to drive the unloading sleeve 101 to rotate. When the unloading sleeve 101 rotates, it can drive the feeding sleeve 104 to rotate, so that the feeding sleeve 104, which contains other cutting blades 5, rotates to below the clamping member 4. At this time, the servo motor 108 is controlled to drive the connecting gear 107 to rotate in the reverse direction, so that the feeding sleeve 104 moves upwards again to transport the cutting blades 5 into the clamping member 4. In this way, the cutting blades 5 can be automatically replaced without manual operation, making the operation more convenient.

[0040] like Figure 11 As shown, it also includes wedge blocks 11. Each feeding sleeve 104 has multiple wedge blocks 11 evenly spaced along the circumference in its upper part. After the feeding sleeve 104 moves upward and fits on the outside of the cutting blade 5, the feeding sleeve 104 continues to move upward, which can drive the wedge blocks 11 to move upward. When the cutting blade 5 moves upward, the upper part of the cutting blade 5 becomes thicker. At this time, the cutting blade 5 can be clamped by contacting the wedge blocks 11. Then, when the feeding sleeve 104 moves downward, the cutting blade 5 can be pulled downward by the wedge blocks 11, thereby assisting in unloading the cutting blade 5.

[0041] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A numerical control machine tool auxiliary tool changer, characterized by, The machine includes a machine head (1), a spindle (2), an external hexagonal extrusion frame (3), a clamping member (4), a cutting tool (5), a connecting mechanism, and an extrusion mechanism. The machine head (1) is equipped with a spindle (2), and the lower part of the spindle (2) is connected to the external hexagonal extrusion frame (3) by a thread. The clamping member (4) is installed inside the spindle (2), and the cutting tool (5) is clamped inside the clamping member (4). The connecting mechanism is set on the machine tool, and an extrusion mechanism is provided between the machine head (1) and the connecting mechanism. The connecting mechanism includes a guide sleeve (71), an outer sleeve (72), a connecting seat (75), and an inner hexagonal sleeve (6). The connecting seat (75) is mounted on the machine tool, and the outer sleeve (72) is connected to the connecting seat (75). The guide sleeve (71) is connected to the upper part of the outer sleeve (72), and the inner hexagonal sleeve (6) is slidably and rotatably connected inside the outer sleeve (72). The inner hexagonal sleeve (6) can be fitted onto the outer hexagonal extrusion frame (3). The bottom of the internal hexagonal sleeve (6) is evenly spaced with multiple locking shafts (61), and the upper part of the guide sleeve (71) is evenly spaced with multiple locking grooves. The locking shafts (61) can be inserted into the locking grooves when they move down. The bottom of the machine head (1) is connected to a lower pressure sleeve (84), and multiple extrusion shafts (85) are evenly spaced at the bottom of the lower pressure sleeve (84). Multiple inclined grooves are evenly spaced at the upper part of the outer sleeve (72), and the number of inclined grooves is the same as the number of extrusion shafts (85). The inclined grooves are located below the extrusion shafts (85). The CNC machine tool auxiliary tool changing device also includes a drive mechanism, which includes an external gear ring (81), a drive motor (82) and a drive gear (83). The drive motor (82) is mounted on the connecting seat (75), and the drive gear (83) is connected to the output shaft of the drive motor (82). The external gear ring (81) is connected to the lower part of the outer sleeve (72), and the external gear ring (81) meshes with the drive gear (83). The CNC machine tool auxiliary tool changing device also includes a feeding mechanism, which includes a feeding sleeve (101), a base plate (102), a stepper motor (103), a feeding sleeve (104), an outer cylinder (109), and a drive assembly. The bottom of the connecting seat (75) is connected to the base plate (102), and the feeding sleeve (101) is rotatably connected to the top of the base plate (102). The stepper motor (103) is installed on the base plate (102), and the output shaft of the stepper motor (103) rotates with the feeding sleeve (101). Multiple feeding sleeves (104) are slidably connected to the outer side of the feeding sleeve (101) at uniform intervals along the circumference. The top of the base plate (102) is connected to the outer cylinder (109), and the outer cylinder (109) is sleeved between the outer sides of the multiple feeding sleeves (104). A drive assembly is provided between the base plate (102) and the feeding sleeve (101).

2. The auxiliary tool changing device for CNC machine tools according to claim 1, characterized in that, An elastic element (73) is connected between the inner hexagonal sleeve (6) and the outer sleeve (72), and an elastic element (74) is connected between the guide sleeve (71) and the outer sleeve (72).

3. The auxiliary tool changing device for CNC machine tools according to claim 2, characterized in that, The bottom of the locking shaft (61) is tapered.

4. A CNC machine tool auxiliary tool changing device according to claim 3, characterized in that, It also includes a connecting sleeve (91), the top of the internal hexagonal sleeve (6) is connected to the connecting sleeve (91), and the connecting sleeve (91) has a guide groove, which is hexagonal.

5. A CNC machine tool auxiliary tool changing device according to claim 4, characterized in that, The drive assembly includes a transmission gear (106), a connecting gear (107), a threaded rod (105), and a servo motor (108). Multiple threaded rods (105) are rotatably connected to the outer side of the feeding sleeve (101) at uniform intervals along the circumference. The threaded rods (105) are threadedly engaged with the feeding sleeve (104). The bottom of the threaded rods (105) is connected to the transmission gear (106). The servo motor (108) is mounted on the base plate (102). The output shaft of the servo motor (108) is connected to the connecting gear (107). The transmission gear (106) can move to mesh with the connecting gear (107).

6. A CNC machine tool auxiliary tool changing device according to claim 5, characterized in that, It also includes wedge blocks (11), with multiple wedge blocks (11) evenly spaced along the circumference in the upper part of each feeding sleeve (104).

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