High-speed CNC machining center

Abstract

The present invention relates to a high-speed CNC machining center, which includes a machine frame, a spindle box and a tool magazine. The tool magazine includes a swing frame and a turntable. The turntable is rotatably mounted on the swing frame. A plurality of tool claws are provided on the periphery of the turntable, and each tool claw is used for clamping a tool. A tool changing station is provided on the tool magazine in the rotation direction of the turntable. The spindle box is mounted on the machine frame so as to move up and down. A spindle is provided on the spindle box. The swing frame of the tool magazine is swingably mounted on the machine frame between an avoidance position and a tool changing position. A linkage mechanism is provided between the spindle box and the swing frame. Each tool claw is slidably mounted on the turntable between an extended position and a retracted position. An expansion and contraction drive mechanism for driving the tool claw reaching the tool changing station to slide is provided on the swing frame. By enabling the tool claw to slide along the radial direction of the tool, the present invention realizes that after the spindle clamps and fixes the tool, the tool claw disengages from the tool, so as to avoid the tool claw prying the tool when the tool magazine swings, and ensure the clamping accuracy.

Description

Technical Field

[0001] The present invention relates to a high-speed CNC machining center. Background Art

[0002] A high-speed CNC machining center generally includes a frame, a spindle box and a tool magazine. The linkage between the spindle box and the tool magazine can achieve tool change.

[0003] The Chinese Patent Application Publication Specification CN 107030511 A discloses an intelligent high-precision and fast tool-changing servo tool magazine, which includes a tool disc and tool claw mechanisms evenly distributed around the tool disc. Each tool claw mechanism is used to hold a tool.

[0004] The Chinese Patent Application Publication Specification CN 107803542 A discloses a tool claw of a numerically controlled milling machine with elastic setting. It holds the tool by two supporting feet plates. At the front end of each supporting feet plate, there is a roller for closely abutting the held tool, and at the rear end of each supporting feet plate, there is a return spring for providing the acting force for the supporting feet plate to hold the tool.

[0005] The tool-changing mechanism of a drilling and tapping machine disclosed in the Chinese Utility Model Patent Specification CN 204868284 U includes a spindle box that can slide up and down, a tool magazine bracket and a tool disc. The tool disc is hinged to the tool magazine bracket through a pin shaft. A guiding plate is fixed on the outside of the spindle box. There is a roller on the tool disc that abuts against the guiding plate. An elastic member (i.e., a tension spring) is provided between the tool disc and the tool magazine bracket for pulling the tool disc towards the column side so that the roller always abuts against the guiding plate. When the guiding plate moves up and down driven by the spindle box, it can guide the roller, causing the tool disc to deflect around the pin shaft, so as to be in an inclined state or a drooping state. During this process, the elastic member always generates a pulling force on the tool disc.

[0006] The tool-changing process of the existing high-speed CNC machining center can be seen as follows:

[0007] (a) As Figure 1 shown, the tool magazine 101 is hinged to the frame 103 through a pin shaft 102. The tension spring 104 between the frame 103 and the tool magazine 101 is used to always make the roller 105 on the tool magazine 101 abut against the guiding plate 107 with a cam curve profile 106. The turntable of the tool magazine 101 rotates the tool to be changed 110 to the tool-changing station. At this time, the spindle 109 on the spindle box 108 is located above the tool to be changed 110;

[0008] (b) As Figure 2 shown, the tool to be changed 110 is held on the tool claw 111;

[0009] (c) As Figure 3As shown, the spindle box 108 is driven down so that the tool handle of the tool to be replaced is inserted into the spindle 109 and is clamped and fixed by the spindle 109;

[0010] (d) If Figure 4 As shown, the spindle box 108 is driven down continuously, and the tool magazine 101 swings under the compulsion of the cam curve profile 106 of the guide plate, so that the tool magazine 101 avoids the spindle box 108 and the tool 110 to be replaced is separated from the tool claw 111, thereby realizing the tool change.

[0011] However, if Figure 5 As shown, with the axis direction of the spindle as the vertical direction and the axis direction perpendicular to the spindle as the horizontal direction, when the tool magazine 101 swings, since the position of the tool to be replaced 110 in the horizontal direction remains unchanged, the tool claw 111 rises with the swing of the tool magazine, resulting in the prying of the tool to be replaced 110, which increases the wear of the tool, affects the accuracy of tool clamping, and thus affects the machining accuracy. Summary of the invention

[0012] The object of the present invention is to provide a high-speed CNC machining center, comprising a frame, a spindle box and a tool magazine; the tool magazine comprises a swing frame and a turntable, the turntable is rotatably mounted on the swing frame around the axis of the turntable, the periphery of the turntable is provided with a plurality of tool claws equidistantly distributed around the axis of the turntable, each tool claw is used to clamp a tool; the tool magazine is provided with a tool changing station in the rotation direction of the turntable, and any tool claw can be selectively made to reach the tool changing station when the turntable rotates; the spindle box is mounted on the frame for up and down lifting and lowering movement; the spindle box is provided with a spindle; the swing frame of the tool magazine is swingably mounted on the frame between a evasive position and a tool changing position, and a linkage mechanism is provided between the spindle box and the swing frame for driving the swing frame to swing when the spindle box is lifted and lowered; each tool claw is slidably mounted on the turntable between an extended position and a retracted position along the radial direction of the tool clamped by the tool claw; the swing frame is provided with a telescopic driving mechanism for driving the tool claw that reaches the tool changing station to slide.

[0013] The present invention enables the knife claw to slide in the radial direction of the tool, thereby allowing the knife claw to detach from the tool after the spindle completes clamping and fixing the tool, so as to avoid the knife claw from prying the tool when following the swing of the tool magazine, thereby ensuring the clamping accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figures 1 to 5 The schematic diagram of the tool changing process of the existing high-speed CNC machining center is shown;

[0015] Figure 6 Shows a front view of the present invention;

[0016] Figure 7 and Figure 8 Two stereograms of the present invention at different angles are shown respectively;

[0017] Figure 9 and Figure 10 respectively show the perspective views of the headstock and the tool magazine of the present invention at two different angles;

[0018] Figure 11 shows the front view of the headstock and the tool magazine of the present invention;

[0019] Figure 12 and Figure 13 respectively show the exploded perspective views of the headstock and the tool magazine of the present invention at two different angles;

[0020] Figure 14 shows the perspective view of the groove cam of the present invention;

[0021] Figure 15 shows the front view of the groove cam of the present invention;

[0022] Figure 16 and Figure 17 respectively show the exploded perspective views of the tool magazine of the present invention at two different angles;

[0023] Figure 18 shows the perspective view of the turntable after hiding all the tools of the present invention;

[0024] Figure 19 shows Figure 18 the enlarged partial view of part A of;

[0025] Figure 20 shows after Figure 19 the schematic diagram of the components disassembled on the basis of;

[0026] Figure 21 shows Figure 19 the sectional view taken along B-B of;

[0027] Figure 22 shows after Figure 21 the schematic diagram of the components disassembled on the basis of;

[0028] Figure 23 shows the perspective view of the telescopic drive mechanism of the present invention;

[0029] Figure 24 shows the front view of the telescopic drive mechanism of the present invention;

[0030] Figure 25 shows the exploded perspective view of the telescopic drive mechanism of the present invention;

[0031] Figure 26 shows the perspective view of the swing frame and the turntable of the present invention;

[0032] Figure 27 showsFigure 26 Partial enlarged view of part C;

[0033] Figure 28 The perspective view shows the telescopic drive mechanism and the tool claw of the present invention, where the active part of the clutch is engaged with the driven part of the clutch, and the tool claw is in the extended position;

[0034] Figure 29 Shows that on the basis of Figure 28 Schematic diagram after driving the tool claw to slide to the retracted position;

[0035] Figure 30 Shows that on the basis of Figure 28 Schematic diagram after driving the active part of the clutch to separate from the driven part of the clutch;

[0036] Figures 31 to 35 Schematic diagram showing the tool change process of the present invention.

[0037] Reference numerals in the drawings:

[0038] 10 Machine frame;

[0039] 20 Spindle box, 201 Spindle;

[0040] 30 Tool magazine, 301 Swing frame, 302 Turntable, 303 Inner cover, 304 Outer cover, 305 Guide mechanism, 306 Telescopic drive motor, 307 Active part of the clutch, 308 Clutch support, 309 Clutch sliding seat, 310 Clutch drive motor, 311 Clutch drive lead screw, 312 Clutch drive nut, 313 Push rod, 314 Roller;

[0041] 40 Tool claw, 401 Rotating shaft, 402 Driven part of the clutch, 403 Gear, 404 Rack, 405 Concave socket;

[0042] 50 Tool;

[0043] 60 Elastic positioning bead, 601 Ball bead;

[0044] 70 Groove cam, 701 Groove, 702 Tool change holding section, 703 Transition section, 704 Avoidance holding section. Detailed implementation manners

[0045] The following further describes the solution of the present application in conjunction with the drawings.

[0046] As Figures 1 to 30 shown, a high-speed CNC machining center includes a machine frame 10, a spindle box 20 and a tool magazine 30;

[0047] The tool magazine 30 includes a swing frame 301 and a turntable 302. The turntable 302 is rotatably mounted on the swing frame 301 around the axis of the turntable. A plurality of tool claws 40 are circumferentially and equally spaced around the axis of the turntable on the periphery of the turntable 302. Each tool claw 40 is used to hold a tool 50, where the tools include drilling tools, milling tools, and tapping tools, thereby forming a high-speed CNC machining center for drilling, milling, and tapping. In this embodiment, the tool magazine 30 includes an inner cover 303 fixedly mounted on the swing frame 301 and an outer cover 304 fixedly mounted on the turntable 302. The specific structure of the tool claw 40 can adopt the existing technology.

[0048] The tool magazine 30 is provided with a tool change station in the rotation direction of the turntable 302. When the turntable 302 rotates, any tool claw 40 can be selectively made to reach the tool change station.

[0049] The spindle headstock 20 is mounted on the machine frame 10 to move up and down, and a spindle 201 is provided on the spindle headstock 20.

[0050] The swing frame 301 of the tool magazine 30 is swingably mounted on the machine frame 10 between an avoidance position and a tool change position.

[0051] A linkage mechanism is provided between the spindle headstock 20 and the swing frame 301 to drive the swing frame 301 to swing when the spindle headstock 20 moves up and down.

[0052] Each tool claw 40 is slidably mounted on the turntable 302 along the radial direction of the tool 50 held by the tool claw between an extended position and a retracted position. In this embodiment, a guiding mechanism 305 (such as a guide rail slider) for guiding the tool claw to slide along the radial direction of the tool held by the tool claw can be provided for each tool claw on the turntable 302.

[0053] The swing frame 301 is provided with a telescopic driving mechanism for driving the tool claw 40 that reaches the tool change station to slide.

[0054] This technical solution enables the tool claw to slide along the radial direction of the tool, thereby realizing that after the spindle clamps and fixes the tool, the tool claw disengages from the tool to avoid the tool claw prying the tool when the tool magazine swings, ensuring the clamping accuracy.

[0055] Each tool claw 40 is respectively equipped with a rotating shaft 401, a driven part 402 of a clutch, and a transmission mechanism. The rotating shaft 401 is rotatably mounted on the turntable 302. The driven part 402 of the clutch is fixedly mounted on the rotating shaft 401. The transmission mechanism is arranged between the tool claw 40 and the rotating shaft 401, and the transmission mechanism is configured to convert the rotational motion of the rotating shaft 401 into the linear sliding of the tool claw 40.

[0056] The telescopic driving mechanism includes a telescopic driving motor 306 and the driving part 307 of a clutch. The driving part 307 of the clutch is fixedly installed on the output shaft of the telescopic driving motor 306;

[0057] The driving part 307 of the clutch of the telescopic driving mechanism can selectively engage and disengage with the driven part 402 of the clutch of the tool claw reaching the tool changing station. The rotating shaft of the tool claw reaching the tool changing station is connected to the output shaft of the telescopic driving motor when the driven part of the clutch is engaged with the driving part of the clutch to transmit power, and the rotating shaft of the tool claw reaching the tool changing station is separated from the output shaft of the telescopic driving motor when the driven part of the clutch is separated from the driving part of the clutch to cut off the power.

[0058] This technical solution has a reasonable design. By using the separation and engagement of the driving part of the same clutch with the driven parts of different clutches, it is possible to use the same telescopic driving motor to control all tool claws, without the need to configure a telescopic driving motor for each tool claw separately. While ensuring the effectiveness of the control, the structure is simplified.

[0059] The telescopic driving mechanism further includes a clutch support 308, a clutch sliding seat 309, a clutch driving motor 310, a clutch transmission lead screw 311 and a clutch transmission nut 312;

[0060] The clutch support 308 is fixedly installed on the swing frame 301;

[0061] The clutch sliding seat 309 is slidably installed on the clutch support 308 along the axis of the output shaft of the telescopic driving motor 306;

[0062] The telescopic driving motor 306 is fixedly installed on the clutch sliding seat 309;

[0063] The axis of the output shaft of the telescopic driving motor 306 coincides with the axis of the rotating shaft 401 of the tool claw reaching the tool changing station;

[0064] The driving part 307 of the clutch of the telescopic driving mechanism and the driven parts 402 of the clutches of each tool claw are both toothed half clutches, so that the driving part of the clutch of the telescopic driving mechanism and the driven part of the clutch of the tool claw reaching the tool changing station form a jaw clutch;

[0065] The clutch transmission lead screw 311 is rotatably installed on the clutch support 308, and the axis of the clutch transmission lead screw 311 is parallel to the axis of the output shaft of the telescopic driving motor 306;

[0066] The clutch transmission nut 312 is fixedly installed on the clutch sliding seat 309, and the clutch transmission nut 312 is sleeved outside the clutch transmission lead screw 311, so that the clutch transmission nut 312 and the clutch transmission lead screw 312 form a lead screw-nut motion mechanism;

[0067] The clutch driving motor 310 is fixedly mounted on the clutch bracket 308, and the output shaft of the clutch driving motor 310 is fixedly connected to the clutch transmission lead screw 311, so that when the output shaft of the clutch driving motor rotates, the clutch sliding seat, the telescopic driving motor and the active part of the clutch are driven by the lead screw nut motion mechanism to slide along the axis of the output shaft of the telescopic driving motor away from or close to the rotating shaft of the tool claw reaching the tool changing station and the driven part of the clutch;

[0068] When the output of the clutch driving motor 310 rotates, it drives the telescopic driving motor 306 to slide between an engaged position and a disengaged position;

[0069] The active part 307 of the clutch of the telescopic driving mechanism is engaged with the driven part 402 of the clutch of the tool claw reaching the tool changing station when the telescopic driving motor 306 is in the engaged position;

[0070] The active part 307 of the clutch of the telescopic driving mechanism is disengaged from the driven part 402 of the clutch of the tool claw reaching the tool changing station when the telescopic driving motor 306 is in the disengaged position.

[0071] This technical solution can use the clutch driving motor to control the engagement and disengagement between the active part of the clutch and the driven part of the clutch of the tool claw reaching the tool changing station. Its design is reasonable and easy to implement. In addition, the clutch driving motor is used to drive the active part of the clutch away from the driven part of the clutch to avoid the interference of the active part of the clutch on the rotation of the turntable.

[0072] The transmission mechanism of each tool claw includes a gear 403 and a rack 404 extending radially along the tool held by the tool claw;

[0073] The rack 404 is fixedly mounted on the tool claw 40;

[0074] The gear 403 is fixedly mounted on the rotating shaft 401.

[0075] The transmission mechanism disclosed by this technical solution has a simple structure and is easy to implement.

[0076] Each tool claw 40 is also respectively equipped with a locking mechanism. The locking mechanism is mounted on the turntable 302 and is configured to prevent the rotation of the rotating shaft (i.e., prevent the tool claw from sliding) when the tool claw 40 is in the extended position.

[0077] This technical solution can lock the tool claws in the extended position by setting up a locking mechanism. On the one hand, it can prevent the tool claws from disengaging from the extended position, which may cause the spindle to fail to align with the tool on the tool claw reaching the tool change station, thus affecting the tool change operation. On the other hand, it can ensure that the driven part of the toothed clutch is aligned with the driving part of the toothed clutch when the tool claw reaches the tool change station, facilitating the alignment and engagement of the two parts.

[0078] This locking mechanism includes an elastic positioning bead 60;

[0079] A concave socket 405 for the ball bead 601 of the elastic positioning bead to sink into is provided on the driven part 402 of the clutch of each tool claw;

[0080] When the tool claw is in the extended position, the ball bead 601 of the elastic positioning bead of each tool claw sinks into the concave socket 405 of the driven part of the clutch to prevent the driven part 402 of the clutch from rotating, thereby preventing the rotation of the rotating shaft and the sliding of the tool claw.

[0081] The locking mechanism disclosed in this technical solution has a simple structure and is easy to implement. Only under a forced torque, the driven part of the clutch (including the rotating shaft and the tool claw) can move. After the driving part of the clutch is engaged with the driven part of the clutch, the telescopic drive motor can provide a force to overcome the elastic positioning bead to the driven part of the clutch, causing the ball bead of the elastic positioning bead to move out of the concave socket, and the driven part of the clutch (including the rotating shaft and the tool claw) will move.

[0082] In this embodiment, the elastic positioning bead (also called positioning bead (ball plunger and Spring plunger), ball head plunger or spring plunger) can adopt the existing technology.

[0083] This linkage mechanism includes a grooved cam 70 fixedly installed on the spindle box and a push rod 313 fixedly installed on the swing frame 301.

[0084] A groove 701 is provided on the grooved cam 70, and a roller 314 placed in the groove 701 is provided on the push rod 313;

[0085] The groove 701 includes a tool change holding section 702, a transition section 703, and an avoidance holding section 704 connected in sequence from bottom to top. Among them,

[0086] The tool magazine 30 is always located at the tool change position when the roller 314 is in the tool change holding section 702;

[0087] The tool magazine 30 is always located at the avoidance position when the roller 314 is in the avoidance holding section 704;

[0088] The transition section 703 is for the roller 314 to transition between the tool change holding section 702 and the avoidance holding section 704.

[0089] As in the prior art and Figures 1 to 5 the tension spring shown in it, its effectiveness directly affects the entire tool change process. And the tension spring itself is prone to fatigue failure, so it needs to be replaced regularly.

[0090] However, in this embodiment, by using the principle of the groove cam mechanism, the roller is always restricted within the groove, and there is no need to additionally set a tension spring, which can improve the service life and ensure the smooth progress of the tool change process.

[0091] A groove cam 70 and a push rod 313 form a set of linkage units;

[0092] There are two sets of such linkage units;

[0093] The two sets of linkage units are separated on both sides of the spindle box 20.

[0094] Setting a set of linkage units on both sides of the spindle box in this technical solution can make the linkage process smoother and more stable.

[0095] The working process of the present invention can be referred to as follows.

[0096] (1) As Figure 31 shown, the roller 314 is in the tool change holding section 702 of the groove, the tool magazine 30 is in the tool change position, the turntable 302 rotates the tool 50 to the tool change station, the tool claw 40 is in the extended position, the telescopic drive motor 306 is in the separated position, the active part 307 of the clutch is separated from the driven part 402 of the clutch, and the spindle 201 is located above the tool 50;

[0097] (2) As Figure 32 shown, drive the spindle box 20 to descend so that the tool shank of the tool 50 is inserted into the spindle 201 and clamped and fixed by the spindle 201, and drive the clutch sliding seat 309 and the telescopic drive motor 306 to descend to the engagement position so that the active part 307 of the clutch is engaged with the driven part 402 of the clutch;

[0098] (3) As Figure 33 shown, drive the tool claw 40 to slide to the retracted position so that the tool claw 40 leaves the tool 50;

[0099] (4) As Figure 34 shown, drive the spindle box 20 to descend again, the spindle 201 drives the tool to descend, and the roller 314 forces the tool magazine to swing from the tool change position to the avoidance position under the guidance of the transition section 703 of the groove so that the tool magazine 30 avoids the spindle box 20;

[0100] (5) As Figure 35As shown, after the main spindle box 20 continues to descend, the roller 314 is in the avoidance and retention section 704 of the groove, and the tool magazine 30 is in the avoidance position, completing the tool change operation.

[0101] After that, after the tool is used up, first drive the main spindle box to reach the position as Figure 32 shown, where the main spindle box can first rise to the highest position and then descend to the Figure 32 shown position; then drive the tool claw to slide from the retracted position to the extended position so that the tool claw clamps the tool on the main spindle; finally, the main spindle releases the tool, the main spindle box rises to separate the main spindle from the tool, and drive the clutch sliding seat and the telescopic drive motor to rise to the separation position to separate the active part of the clutch from the driven part of the clutch; complete putting the used tool back to the tool claw.

Claims

1. A high-speed CNC machining center, comprising a frame, a spindle box and a tool magazine; The tool magazine includes a swing frame and a turntable, the turntable is rotatably mounted on the swing frame around the axis of the turntable, a plurality of tool claws are circumferentially and equally spaced around the axis of the turntable on the periphery of the turntable, and each tool claw is used for clamping a tool; The tool magazine is provided with a tool changing station in the rotation direction of the turntable, and when the turntable rotates, any tool claw can be selectively made to reach the tool changing station; The spindle box is mounted on the frame to move up and down, and a spindle is provided on the spindle box; The swing frame of the tool magazine is swingably mounted on the frame between a retracted position and a tool changing position; A linkage mechanism is provided between the spindle box and the swing frame to drive the swing frame to swing when the spindle box moves up and down; Each tool claw is slidably mounted on the turntable along the radial direction of the tool clamped by the tool claw between an extended position and a retracted position; The swing frame is provided with a telescopic drive mechanism for driving the tool claw reaching the tool changing station to slide; It is characterized in that: The linkage mechanism includes a groove cam fixedly mounted on the spindle box and a push rod fixedly mounted on the swing frame, The groove cam is provided with a groove, and a roller is provided on the push rod and placed in the groove; The groove includes a tool changing holding section, a transition section and a retracted holding section connected in sequence from bottom to top, wherein, The tool magazine is always located at the tool changing position when the roller is in the tool changing holding section; The tool magazine is always located at the retracted position when the roller is in the retracted holding section; The transition section is for the roller to transition between the tool changing holding section and the retracted holding section.

2. The high-speed CNC machining center according to claim 1, characterized in that: Each tool claw is respectively provided with a rotating shaft, a driven part of a clutch and a transmission mechanism, the rotating shaft is rotatably mounted on the turntable, the driven part of the clutch is fixedly mounted on the rotating shaft, the transmission mechanism is arranged between the tool claw and the rotating shaft, and the transmission mechanism is configured to convert the rotational movement of the rotating shaft into the linear sliding of the tool claw; The telescopic drive mechanism includes a telescopic drive motor and a driving part of the clutch, and the driving part of the clutch is fixedly mounted on the output shaft of the telescopic drive motor; The driving part of the clutch of the telescopic drive mechanism can be selectively engaged and disengaged with the driven part of the clutch of the tool claw reaching the tool changing station.

3. The high-speed CNC machining center according to claim 2, characterized in that: The telescopic drive mechanism further includes a clutch support, a clutch sliding seat, a clutch drive motor, a clutch transmission lead screw and a clutch transmission nut; The clutch support is fixedly mounted on the swing frame; The clutch sliding seat is slidably mounted on the clutch support along the axis of the output shaft of the telescopic drive motor; The telescopic drive motor is fixedly mounted on the clutch sliding seat; The axis of the output shaft of the telescopic drive motor coincides with the axis of the rotating shaft of the tool claw reaching the tool changing station; The driving part of the clutch of the telescopic drive mechanism and the driven part of the clutch of each tool claw are both toothed half clutches; The clutch transmission lead screw is rotatably mounted on the clutch support, and the axis of the clutch transmission lead screw is parallel to the axis of the output shaft of the telescopic drive motor; The clutch drive nut is fixedly mounted on the clutch sliding seat, and the clutch drive nut is sleeved outside the clutch drive lead screw, so that the clutch drive nut and the clutch drive lead screw form a lead screw nut motion mechanism; The clutch drive motor is fixedly mounted on the clutch bracket, and the output shaft of the clutch drive motor is fixedly connected to the clutch drive lead screw; When the output of the clutch drive motor rotates, it drives the telescopic drive motor to slide between an engaged position and a disengaged position; The active part of the clutch of the telescopic drive mechanism is engaged with the driven part of the clutch of the tool claw reaching the tool change station when the telescopic drive motor is in the engaged position; The active part of the clutch of the telescopic drive mechanism is disengaged from the driven part of the clutch of the tool claw reaching the tool change station when the telescopic drive motor is in the disengaged position.

4. The high-speed CNC machining center according to claim 3, characterized in that: The transmission mechanism of each tool claw includes a gear and a rack extending radially along the tool held by the tool claw; The rack is fixedly mounted on the tool claw; The gear is fixedly mounted on the rotating shaft.

5. The high-speed CNC machining center according to claim 4, characterized in that: Each tool claw is also respectively provided with a locking mechanism, which is mounted on the turntable, and the locking mechanism is configured to prevent the rotating shaft from rotating when the tool claw is in the extended position.

6. The high-speed CNC machining center according to claim 5, characterized in that: The locking mechanism includes an elastic positioning bead; A concave groove for the ball of the elastic positioning bead to sink into is provided on the driven part of the clutch of each tool claw; The ball of the elastic positioning bead of each tool claw sinks into the concave groove of the driven part of the clutch when the tool claw is in the extended position to prevent the driven part of the clutch from rotating.

7. The high-speed CNC machining center according to claim 1, characterized in that: A groove cam and a push rod form a set of linkage units; There are two sets of such linkage units; The two sets of linkage units are separated on both sides of the spindle box.

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