Numerical control full-automatic tool changing engraving machine

Abstract

The invention relates to the technical field of engraving machines, and provides a numerical control full-automatic tool-changing engraving machine which comprises a bearing unit and supporting assemblies located on the two sides of the bearing unit, engraving assemblies are arranged on the supporting assemblies, a pair of sliding rails is fixedly connected to the top of the bearing unit, a workpiece table is arranged at the tops of the sliding rails, and the workpiece table is in sliding connection with the sliding rails. The top of the workpiece table is fixedly connected with multiple sets of clamping assemblies and a bottom plate, the carving assembly comprises a third electric telescopic rod, the output end of the third electric telescopic rod is rotationally connected with a first rotating shaft, the other end of the first rotating shaft is fixedly connected with a second rotating shaft, the other end of the second rotating shaft is fixedly connected with a cutterhead, and multiple sets of cutters are arranged on the cutterhead; by carrying multiple sets of tools at a time, tool changing in the carving work is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engraving machines, in particular to a numerically controlled fully automatic tool-changing engraving machine, which improves the efficiency of engraving work by carrying tools of various models at the same time. Background Art

[0002] Engraving machine is a kind of drilling and milling combined processing equipment, which is controlled by computer and uses cutting tools to carve on various materials with high precision.

[0003] CNC engraving machine is a kind of engraving machine. By controlling the driving motor, the tool can be moved along a predetermined path to engrave the pattern on the design drawing on the material. The CNC engraving machine is equipped with an external tool magazine, and its spindle can replace the tool through a hydraulic device to achieve automatic tool change;

[0004] In order to meet the needs of engraving, one engraving job often requires the cooperation of multiple types of tools to complete. The tools are replaced by setting up a tool magazine. When executing some tasks that require frequent tool changes, the spindle will be moved to the tool magazine position many times, and then returned to the material position after the tool change, which affects the efficiency of the engraving work. In addition, the material to be engraved is fixed on the base throughout the work. When multi-sided engraving is required, the machine needs to be stopped to turn the material over, further reducing production efficiency. Summary of the invention

[0005] The present invention provides a CNC fully automatic tool-changing engraving machine, in which multiple sets of tools are installed on a tool disc, electric telescopic rod three cooperates with a sleeve to replace the tools on the main shaft and the tools on the tool disc, and the workpiece can be lifted by electric telescopic rod one and electric telescopic rod two, so that the engraving machine can engrave multiple surfaces of the workpiece conveniently, so as to solve the problems in the background technology that the tool replacement needs to go back and forth to the tool magazine and the back of the workpiece cannot be engraved.

[0006] The technical solution of the present invention is as follows:

[0007] A CNC fully automatic tool-changing engraving machine, a bearing unit and support components located on both sides of the bearing unit, an engraving component is arranged on the support component, a pair of slide rails are fixedly connected to the top of the bearing unit, a workpiece table is slidably connected to the top of the slide rails, a bottom plate and a plurality of clamping components are fixedly connected to the top of the workpiece table, a mounting groove corresponding to the clamping component is provided on the bottom plate, the clamping component includes an axle seat fixed to a corner of the top of the workpiece table, a connecting rod is rotatably connected to the axle seat, a groove 1 and a groove 2 are provided at the bottom of the connecting rod, and a An electric telescopic rod one, the electric telescopic rod one is fixedly connected to the workpiece table, the output end of the electric telescopic rod one is rotatably connected to the inner wall of the groove one, the side wall of the groove two is fixedly connected to the electric telescopic rod two, the output end of the electric telescopic rod two is fixedly connected to a support seat, the top of the support seat is fixedly connected to a splint, one side of the support seat is rotatably connected to an airbag seat, one side of the airbag seat is fixedly connected to an airbag clamp, a pair of elastic parts one are arranged between the support seat and the airbag seat, one end of the elastic part one is fixedly connected to the support seat, and the other end of the elastic part one is fixedly connected to the airbag seat.

[0008] The engraving assembly includes a horizontal track, a horizontal moving unit is arranged on the horizontal track, a vertical moving unit is fixedly connected to one side of the horizontal moving unit, a mounting frame is rotatably connected to the bottom of the vertical moving unit, a mounting seat is rotatably connected in the mounting frame, a main shaft is rotatably connected in the mounting seat, a tool changing assembly is fixedly connected to one side of the mounting seat, the tool changing assembly includes an electric telescopic rod three fixed to one side of the mounting seat, a sleeve is fixedly connected to the bottom of the electric telescopic rod three, the electric telescopic rod three is located in the sleeve, a rotating shaft one is rotatably connected to the output end of the electric telescopic rod three, the other end of the rotating shaft one is fixedly connected to the rotating shaft two, the other end of the rotating shaft two is fixedly connected to a cutter disc, and a plurality of groups of cutting tools are arranged on the cutter disc.

[0009] Furthermore, a ratchet is provided on the rotating shaft one, a groove three is horizontally provided on the rotating shaft two, an elastic member two is fixedly connected in the groove three, and a ball is fixedly connected at one end of the elastic member two.

[0010] Furthermore, a plurality of groups of circular grooves are evenly and vertically formed on the cutter disc, and a limiting groove is horizontally formed on the side wall of the circular groove. An elastic member three is fixedly connected in the limiting groove, and one end of the elastic member three is fixedly connected to a limiting pin.

[0011] Furthermore, a limit ring is fixedly connected to the side wall of the circular groove, and an annular groove is provided on the tool.

[0012] Furthermore, the sleeve includes a sleeve segment 1 and a sleeve segment 2 with different inner diameters. The connecting ends of the sleeve segment 2 and the sleeve segment 1 are fixedly connected to a central axis. A pawl is mounted on the central axis. The pawl is rotatably connected to the central axis. A coil spring is arranged between the pawl and the central axis.

[0013] Furthermore, the inner wall of the sleeve section 2 is provided with a slide groove 1, a slide groove 2 and a slide groove 3, and the slide groove 1 is connected to the slide groove 2.

[0014] Furthermore, the second slide groove extends to the outside of the second sleeve section, and the third slide groove is connected to the second slide groove.

[0015] Furthermore, the opening depths of the slide groove 1 and the slide groove 2 are the same as the radial distance of the ball extending out of the groove 3, and the opening depth of the slide groove 3 is smaller than the opening depth of the slide groove 2.

[0016] Furthermore, a pipe is fixedly connected to the back of the airbag seat, the pipe passes through the support seat and extends to the outside of the mounting groove, and an air pump is fixedly connected to the side of the workpiece table, and the pipe is connected to the air pump.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention uses a tool disc and a spindle in combination. When the tool needs to be replaced, the tool on the tool disc can be replaced with the tool on the spindle, so that there is no need to frequently use the tool magazine to change tools during one engraving work, thereby improving work efficiency.

[0019] 2. The present invention uses a connecting rod and an electric telescopic rod 1 in combination. When the back of a workpiece needs to be engraved, the electric telescopic rod 1 can be used to lift the workpiece so that the workpiece is in an inclined state, which facilitates the engraving component to engrave multiple surfaces of the workpiece.

[0020] 3. The present invention uses an airbag clamp and an air pump in combination. When engraving is required on a workpiece with a curved surface, the airbag clamp can be replaced to clamp the workpiece, so that the workpiece can be installed more stably during the process of lifting and engraving the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the appearance structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the bearing unit of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the engraving assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the tool changing assembly of the present invention;

[0026] Figure 6 is a schematic cross-sectional view of the sleeve of the present invention;

[0027] Figure 7 It is a schematic cross-sectional view of the second rotating shaft of the present invention;

[0028] Figure 8 This is a structural schematic diagram of a rotating shaft of the present invention;

[0029] Fig. 9 It is a schematic cross-sectional view of the cutter head of the present invention;

[0030] Fig.10 It is a schematic diagram of the main shaft structure of the present invention.

[0031] In the figure:

[0032] 1. Carrying unit; 11. Slide rail; 12. Work table; 121. Air pump; 13. Clamping assembly; 131. Shaft seat; 132. Connecting rod; 133. Groove 1; 134. Groove 2; 135. Electric telescopic rod 1; 136. Electric telescopic rod 2; 137. Support seat; 138. Airbag seat; 139. Airbag clamp; 1310. Elastic part 1; 1311. Pipeline; 1312. Clamping plate; 14. Bottom plate; 141. Mounting groove; 2. Support assembly; 3. Engraving assembly; 31. Horizontal track; 32. Horizontal moving unit; 33. Vertical moving unit; 34. Mounting frame; 35. Mounting seat; 36. Spindle; 37. Tool changing assembly; 371. Electric telescopic rod three; 372. Sleeve; 3721. Sleeve section one; 3722. Sleeve section two; 3723. Central axis; 3724. Ratchet; 3725. Coil spring; 3726. Slide slot one; 3727. Slide slot two; 3728. Slide slot three; 373. Rotating shaft one; 3731. Ratchet; 374. Rotating shaft two; 3741. Groove three; 3742. Elastic part two; 3743. Sphere; 375. Cutter disc; 3751. Circular groove; 3752. Limiting groove; 3753. Elastic part three; 3754. Limiting pin; 3755. Limiting ring; 376. Cutter; 3761. Annular groove; 4. Clamping unit; 5. Servo motor. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] The present invention provides a CNC fully automatic tool-changing engraving machine, comprising: a bearing unit 1 and support components 2 located on both sides of the bearing unit 1, an engraving component 3 is arranged on the support component 2, a pair of slide rails 11 are fixedly connected to the top of the bearing unit 1, a workpiece table 12 is slidably connected to the top of the slide rails 11, a bottom plate 14 and a plurality of clamping components 13 are fixedly connected to the top of the workpiece table 12, a mounting groove 141 corresponding to the clamping component 13 is opened on the bottom plate 14, the clamping component 13 includes an axle seat 131 fixed to a corner of the top of the workpiece table 12, and the axle seat 131 is fixed to the top of the workpiece table 12. The seat 131 is rotatably connected with a connecting rod 132, and a groove 133 and a groove 2 134 are provided at the bottom of the connecting rod 132. An electric telescopic rod 135 is arranged in the groove 133, and the electric telescopic rod 135 is fixedly connected to the workpiece table 12. The output end of the electric telescopic rod 135 is rotatably connected to the inner wall of the groove 133, and the side wall of the groove 2 134 is fixedly connected with an electric telescopic rod 2 136, and the output end of the electric telescopic rod 2 136 is fixedly connected to a support seat 137, and the top of the support seat 137 is fixedly connected with a clamping plate 1312. One side of the support seat 137 is rotatably connected to an airbag seat 138, and one side of the airbag seat 138 is fixedly connected to an airbag clamp 139. A pair of elastic members 1310 are provided between the support seat 137 and the airbag seat 138. One end of the elastic member 1310 is fixedly connected to the support seat 137, and the other end of the elastic member 1310 is fixedly connected to the airbag seat 138. When the electric telescopic rod 136 is started, the support seat 137 can be driven to move along the mounting groove 141, so that the clamping plate 1312 clamps the workpiece placed on the bottom plate 14. When the surface of the workpiece being clamped is a curved surface or the back of the workpiece is to be aligned with the back of the workpiece, the clamping plate 1312 can be clamped to the workpiece. When engraving a surface, start the electric telescopic rod 135 to lift the connecting rod 132, and then start the electric telescopic rod 136 to make the airbag clamp 139 fit the surface of the workpiece, and then use the air pump 121 to inflate the airbag clamp 139 to clamp the workpiece. By controlling the electric telescopic rods 136 on both sides of the workpiece, the inclination angle of the workpiece can be adjusted to facilitate engraving on multiple surfaces of the workpiece. When the workpiece is tilted, the airbag seat 138 and the support seat 137 will rotate, so that the airbag clamp 139 can better fit the surface of the workpiece, and the elastic member 1310 can restore it in a non-working state;

[0035] The engraving assembly 3 includes a horizontal track 31, a horizontal moving unit 32 is arranged on the horizontal track 31, a vertical moving unit 33 is fixedly connected to one side of the horizontal moving unit 32, a mounting frame 34 is rotatably connected to the bottom of the vertical moving unit 33, a mounting seat 35 is rotatably connected in the mounting frame 34, a main shaft 36 is rotatably connected in the mounting seat 35, a tool changing assembly 37 is fixedly connected to one side of the mounting seat 35, and the tool changing assembly 37 includes an electric telescopic rod 371 fixed to one side of the mounting seat 35, and the electric telescopic rod 371 is fixed to one side of the mounting seat 35. A sleeve 372 is fixedly connected to the bottom, the electric telescopic rod three 371 is located in the sleeve 372, the output end of the electric telescopic rod three 371 is rotatably connected to a rotating shaft 1 373, the other end of the rotating shaft 1 373 is fixedly connected to a rotating shaft 2 374, the other end of the rotating shaft 2 374 is fixedly connected to a cutter disc 375, and a plurality of groups of cutting tools 376 are arranged on the cutter disc 375, and the cooperation of the horizontal moving unit 32 and the vertical moving unit 33 can move the cutting tools 376 to the engraving location of the workpiece, and different types of cutting tools 376 are used in turn to engrave the workpiece.

[0036] Among them, a ratchet 3731 is provided on the rotating shaft 1 373, and a groove 3741 is horizontally provided on the rotating shaft 2 374. An elastic member 2 3742 is fixedly connected in the groove 3741, and a ball 3743 is fixedly connected to one end of the elastic member 2 3742. The ball 3743 will retract into the groove 3 3741 after receiving the pressure from the inner wall of the sleeve 372, and the elastic member 2 3742 will be compressed.

[0037] Among them, multiple groups of circular grooves 3751 are evenly and vertically opened on the tool disc 375, and the side walls of the circular grooves 3751 are horizontally opened with limiting grooves 3752. An elastic member 3753 is arranged in the limiting groove 3752, and one end of the elastic member 3753 is fixedly connected to the inner wall of the limiting groove 3752, and the other end of the elastic member 3753 is fixedly connected to the limiting pin 3754. When the limiting pin 3754 extends out of the limiting groove 3752, it will cooperate with the circular groove 3751 to fix the tool 376.

[0038] The side wall of the circular groove 3751 is fixedly connected to a limit ring 3755, and the tool 376 is provided with an annular groove 3761. When the tool 376 is installed in the circular groove 3751, the limit ring 3755 will be located in the annular groove 3761, so that the tool 376 is installed more stably.

[0039] Among them, the sleeve 372 includes a sleeve segment 1 3721 and a sleeve segment 2 3722 with different inner diameters. The connecting ends of the sleeve segment 2 3722 and the sleeve segment 1 3721 are fixedly connected with a central axis 3723. A pawl 3724 is mounted on the central axis 3723. The pawl 3724 is rotatably connected to the central axis 3723. A coil spring 3725 is arranged between the pawl 3724 and the central axis 3723. The ratchet 3731 cooperates with the pawl 3724 to limit the rotation direction of the rotating shaft 1 373 and the rotating shaft 2 374.

[0040] Among them, the inner wall of the sleeve section 2 3722 is provided with a slide groove 1 3726, a slide groove 2 3727 and a slide groove 3728. The slide groove 1 3726 is connected with the slide groove 2 3727, and cooperates with the ball 3743 to make the rotating shaft 2 374 move downward and rotate along the trajectory of the slide groove 1 3726 and the slide groove 2 3727.

[0041] The second slide groove 3727 extends to the outside of the second sleeve section 3722, and the third slide groove 3728 is connected to the second slide groove 3727. When the second rotating shaft 374 moves upward, it moves along the track of the third slide groove 3728.

[0042] Among them, the opening depths of the slide groove 1 3726 and the slide groove 2 3727 are the same as the radial distance of the ball 3743 extending out of the groove 3 3741, and the opening depth of the slide groove 3 3728 is smaller than the opening depth of the slide groove 2 3727. When the ball 3743 moves in the slide groove 1 3726 and the slide groove 2 3727, the elastic member 2 3742 is in a relaxed state. When the ball 3743 moves in the slide groove 3 3728, a part of it will be squeezed into the groove 3 3741, and the elastic member 2 3742 will be compressed.

[0043] Among them, the back of the airbag seat 138 is fixedly connected with a pipe 1311, and the pipe 1311 passes through the support seat 137 and extends to the outside of the mounting groove 141. The side of the workpiece table 12 is fixedly connected with an air pump 121, and the pipe 1311 is connected to the air pump 121, and the air pump 121 can inflate the airbag clamp 139.

[0044] Embodiment 1:

[0045] like Figure 1-10As shown, in this embodiment, before the CNC engraving machine starts working, the various types of tools 376 required for this engraving work are first installed on the cutter disc 375, and then the workpiece to be engraved is placed on the base plate 14. When the workpiece is a normal plate, the electric telescopic rod 136 is started to drive the support seat 137 to move along the mounting groove 141, and then drive the clamping plate 1312 to move toward the workpiece. The multiple clamping plates 1312 cooperate to clamp the workpiece. A driving component is provided in the workpiece table 12, which can drive the workpiece table 12 to move along the slide rail 11. The driving component is started to move the workpiece table 12 to the bottom of the engraving component 3. The tool 376 is moved above the workpiece table 12 by the movement of the horizontal moving unit 32 on the horizontal rail 31, and then the height of the tool 376 is lowered by the vertical moving unit 33, so that the tool 376 contacts the workpiece. At the same time, the spindle 36 in the mounting seat 35 will drive the tool 376 to rotate, and when the tool 376 contacts the workpiece, the surface of the workpiece is rotated and cut for engraving.

[0046] When the engraving assembly 3 needs to change the tool, the main shaft 36 is stopped, and the electric telescopic rod 371 is started. The output end of the electric telescopic rod 371 drives the rotating shaft 1 373 and the rotating shaft 2 374 to move in the sleeve 372. The ball 3743 on the rotating shaft 2 374 will first move along the sliding groove 1 3726. At this time, the rotating shaft 2 374 gradually extends out of the sleeve section 2 3722, driving the cutter disc 375 to move downward. At this time, the circular groove 3751 without the tool 376 will gradually fit onto the tool 376 connected to the main shaft 36. The limit pin 3754 fits with the conical surface of the tool 376 and retracts into the limit groove 3752 under the thrust of the electric telescopic rod 371. The elastic part 3753 is compressed. When the limit pin 3754 moves to the annular groove 3761, it will be ejected out of the limit groove 3752 by the elastic force of the elastic part 3753. The limit pin 3754 enters the annular groove 3761, fixing the tool 376 in the circular groove 3751. At the same time, the spindle 36 is separated from the tool 376, and the disassembly of the tool 376 is completed.

[0047] It should be noted that a servo motor 5 for driving the spindle 36 to rotate is disposed in the mounting seat 35 of the engraving machine. A clamping unit 4 is disposed at the end of the spindle 36 to clamp one spherical end of the tool 376 so that the tool 376 is driven to rotate when the spindle 36 rotates.

[0048] As the electric telescopic rod three 371 continues to push, when the ball 3743 moves to the second slide groove 3727, it will enter the second slide groove 3727 and move along the second slide groove 3727. At this time, the second shaft 374 together with the first shaft 373 spirally move downward in the sleeve 372, driving the tool 376 that is detached from the main shaft 36 to move downward around the second shaft 374 to make it leave the bottom of the main shaft 36. When the ball 3743 moves out of the second slide groove 3727, the electric telescopic rod three 371 is stopped. At this time, the tool disc 375 will drive the next group of tools 376 to rotate to the bottom of the main shaft 36.

[0049] The next set of cutters 376 is installed. The electric telescopic rod 371 is started to retract it. Due to the cooperation between the pawl 3724 and the ratchet 3731, the shaft 2 374 together with the shaft 1 373 can only rotate in one direction. Under the action of the electric telescopic rod 371, the ball 3743 is squeezed by the inner wall of the sleeve section 2 3722 to partially retract into the groove 3 3741. The elastic member 2 3742 is compressed, and the ball 3743 moves vertically upward along the shallow groove 3 3728 until the ball end of the cutter 376 enters the spindle 36. The clamping unit 4 in the spindle 36 clamps the ball end of the cutter 376, and the installation is completed. To change the tool, the electric telescopic rod three 371 continues to drive the rotating shaft two 374 and the rotating shaft one 373 to retract, and the limit pin 3754 contacts the edge of the annular groove 3761. When the electric telescopic rod three 371 is pulled, the limit pin 3754 is squeezed by the edge of the annular groove 3761 and retracts into the limit groove 3752. At this time, the elastic member three 3753 is compressed. When the limit pin 3754 disengages from the annular groove 3761, the tool 376 disengages from the tool disc 375, and the electric telescopic rod three 371 will drive the rotating shaft two 374 to completely retract the sleeve 372, so that the tool 376 on the tool disc 375 is higher than the tool 376 in the main shaft 36.

[0050] When the workpiece processed by the engraving machine has a curved surface or needs to have its bottom surface processed, the electric telescopic rod 135 is started, and its output end pushes the connecting rod 132 to rotate around the shaft seat 131, so that the connecting rod 132 is lifted, and at the same time, the electric telescopic rod 136 is started, so that its output end drives the airbag clamp 139 to move toward the workpiece until the surface of the airbag clamp 139 fits the workpiece, and the air pump 121 is started to inflate the airbag clamp 139, and the workpiece is clamped with the cooperation of multiple groups of airbag clamps 139, and the workpiece can be tilted by controlling the electric telescopic rod 136 on one side of the workpiece to extend and the electric telescopic rod 136 on the other side to contract, and the workpiece can be tilted, and the workpiece can be lifted while being lifted by the extension of the electric telescopic rod 135, so that the engraving component 3 can engrave multiple surfaces of the workpiece.

[0051] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A CNC fully automatic tool-changing engraving machine, comprising: A bearing unit (1) and a supporting assembly (2) located on both sides of the bearing unit (1), wherein the supporting assembly (2) is provided with an engraving assembly (3), characterized in that: a pair of slide rails (11) are fixedly connected to the top of the bearing unit (1), a workpiece table (12) is slidably connected to the top of the slide rails (11), a bottom plate (14) and a plurality of clamping assemblies (13) are fixedly connected to the top of the workpiece table (12), a mounting groove (141) corresponding to the clamping assembly (13) is provided on the bottom plate (14), the clamping assembly (13) comprises an axle seat (131) fixed to a corner of the top of the workpiece table (12), a connecting rod (132) is rotatably connected to the axle seat (131), a groove 1 (133) and a groove 2 (134) are provided at the bottom of the connecting rod (132), and an electric telescopic rod 1 (135) is provided in the groove 1 (133). The electric telescopic rod (135) is fixedly connected to the workpiece platform (12); the output end of the electric telescopic rod (135) is rotatably connected to the inner wall of the groove (133); the side wall of the groove (134) is fixedly connected to the electric telescopic rod (136); the output end of the electric telescopic rod (136) is fixedly connected to the support seat (137); the top of the support seat (137) is fixedly connected to a clamp (1312); one side of the support seat (137) is rotatably connected to an airbag seat (138); one side of the airbag seat (138) is fixedly connected to an airbag clamp (139); a pair of elastic members (1310) are provided between the support seat (137) and the airbag seat (138); one end of the elastic member (1310) is fixedly connected to the support seat (137); and the other end of the elastic member (1310) is fixedly connected to the airbag seat (138); The engraving assembly (3) comprises a horizontal track (31), a horizontal moving unit (32) is arranged on the horizontal track (31), a vertical moving unit (33) is fixedly connected to one side of the horizontal moving unit (32), a mounting frame (34) is rotatably connected to the bottom of the vertical moving unit (33), a mounting seat (35) is rotatably connected inside the mounting frame (34), a main shaft (36) is rotatably connected inside the mounting seat (35), a tool changing assembly (37) is fixedly connected to one side of the mounting seat (35), and the tool changing assembly (37) includes The invention relates to an electric telescopic rod three (371) fixed to one side of the mounting seat (35); the bottom of the electric telescopic rod three (371) is fixedly connected to a sleeve (372); the electric telescopic rod three (371) is located in the sleeve (372); the output end of the electric telescopic rod three (371) is rotatably connected to a rotating shaft one (373); the other end of the rotating shaft one (373) is fixedly connected to a rotating shaft two (374); the other end of the rotating shaft two (374) is fixedly connected to a knife disc (375); and the knife disc (375) is provided with a plurality of sets of knives (376).

2. A CNC fully automatic tool-changing engraving machine as claimed in claim 1, characterized in that: The first rotating shaft (373) is provided with a ratchet (3731), the second rotating shaft (374) is horizontally provided with a groove (3741), the groove (3741) is fixedly connected with an elastic member (3742), and one end of the elastic member (3742) is fixedly connected with a ball (3743).

3. A CNC fully automatic tool-changing engraving machine as claimed in claim 1, characterized in that: The cutter disc (375) is evenly and vertically provided with a plurality of groups of circular grooves (3751), and the side walls of the circular grooves (3751) are horizontally provided with limit grooves (3752). An elastic member three (3753) is arranged in the limit groove (3752), and one end of the elastic member three (3753) is fixedly connected to the inner wall of the limit groove (3752), and the other end of the elastic member three (3753) is fixedly connected to the limit pin (3754).

4. A CNC fully automatic tool-changing engraving machine as claimed in claim 3, characterized in that: The side wall of the circular groove (3751) is fixedly connected to a limit ring (3755), and the cutter (376) is provided with an annular groove (3761).

5. A CNC fully automatic tool-changing engraving machine as claimed in claim 2, characterized in that: The sleeve (372) includes a sleeve section 1 (3721) and a sleeve section 2 (3722) having different inner diameters. The sleeve section 2 (3722) is fixedly connected to a central shaft (3723). A pawl (3724) is mounted on the central shaft (3723). The pawl (3724) is rotatably connected to the central shaft (3723). A coil spring (3725) is arranged between the pawl (3724) and the central shaft (3723).

6. A CNC fully automatic tool-changing engraving machine as claimed in claim 5, characterized in that: The inner wall of the sleeve section 2 (3722) is provided with a slide groove 1 (3726), a slide groove 2 (3727) and a slide groove 3 (3728), and the slide groove 1 (3726) is connected to the slide groove 2 (3727).

7. A CNC fully automatic tool-changing engraving machine as claimed in claim 6, characterized in that: The second slide groove (3727) extends to the outside of the second sleeve section (3722), and the third slide groove (3728) is connected to the second slide groove (3727).

8. A CNC fully automatic tool-changing engraving machine as claimed in claim 7, characterized in that: The opening depths of the slide groove 1 (3726) and the slide groove 2 (3727) are the same as the radial distance of the ball (3743) extending out of the groove 3 (3741), and the opening depth of the slide groove 3 (3728) is less than the opening depth of the slide groove 2 (3727).

9. A CNC fully automatic tool-changing engraving machine as claimed in claim 1, characterized in that: The back of the airbag seat (138) is fixedly connected to a pipe (1311), the pipe (1311) passes through the support seat (137) and extends to the outside of the mounting groove (141), and the side of the workpiece platform (12) is fixedly connected to an air pump (121), and the pipe (1311) is connected to the air pump (121).

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