A three-dimensional engraving machine

Abstract

The present invention provides a three-dimensional engraving machine, which belongs to the technical field of mechanical processing equipment. It solves the problem that the engraving accuracy of the existing engraving machine is easy to decrease after long-term use. The three-dimensional engraving machine includes a frame, a crossbeam, a tool holder and a mounting seat. The frame includes two columns. The columns are fixed with a slide rail arranged vertically on the outer side in the left and right directions. The two ends of the crossbeam respectively have an annular sliding sleeve part. The two sliding sleeve parts are respectively located in the extension direction of the two ends of the crossbeam and are respectively sleeved on the corresponding columns. A slider is fixed on the inner side of each sliding sleeve part, and the slider is slidably connected with the slide rail. The vertical slide rails of the engraving machine are arranged on the left and right sides of the frame, away from the processing area where the mounting seat on the front side of the frame is located, and a dust cover can be installed. The dustproof effect is good, and most of the chips can be prevented from entering the vertical slide rail, thereby reducing the wear problem of the vertical slide rail caused by the entry of chips, so that the engraving accuracy of the engraving machine is not easy to decrease after a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing equipment and relates to a three-dimensional engraving machine. Background Art

[0002] From the processing principle, engraving is a combination of drilling and milling. It has a wide range of applications, including woodworking engraving machines, laser engraving machines, advertising engraving machines, jade engraving machines, stone engraving machines, cylindrical engraving machines, etc. The application range of engraving machines is very wide, and it has even replaced manual engraving technology, laying the foundation for the rapid mass production of products. Engraving machines are divided into vertical engraving machines and horizontal engraving machines. Among them, vertical engraving machines are mainly used for engraving vertically set columnar workpieces.

[0003] For example, Chinese patent [application number: 201520260602.0] discloses a large vertical five-axis CNC engraving device including a machine body, an engraving tool for engraving, an engraving tool holder for mounting the engraving tool, and an up-and-down adjustment device for pushing the engraving tool holder to move up and down. The up and down adjustment device is a fourth slide rail arranged on the front side of the portal frame, and the crossbeam for installing the engraving tool holder is slidably connected to the fourth slide rail; for example, Chinese patent [application number 201620403032.0] discloses a four-axis vertical stone engraving machine, including a frame, and the engraving machine is fixed with a vertically arranged slide rail on the upper edge of the front side of the frame, and the crossbeam for installing the saw blade mounting frame is slidably connected to the slide rail; for example, Chinese patent [application number: 201410077893.X] discloses a large-scale environmentally friendly vertical multifunctional three-dimensional CNC engraving machine, including a gantry frame, and the inner sides of the two side columns of the gantry frame are fixed with X vertical slide rails, and the X vertical slide rails are slidably connected with Z longitudinal beams arranged along the horizontal longitudinal direction, and the Z longitudinal beams are slidably connected with Y beams for installing tools.

[0004] From the analysis of the above-mentioned prior art, it can be known that in the existing vertical engraving machines, the slide rails arranged vertically are either installed on the front side of the frame or on the inner side of the frame. This arrangement causes the positional relationship between the crossbeam and the vertical slide rail to be located on one side of the front-rear direction of the vertical slide rail. The existing arrangement of the vertical slide rails causes the vertical slide rails to be subjected to a very large horizontal and longitudinal component of force, which causes the sliding fit to be easily biased, causing the vertical slide rails to be easily deformed, or the lateral wear is aggravated, resulting in a decrease in the sliding fit accuracy, resulting in a decrease in engraving accuracy; on the other hand, the front or inner side of the existing vertical slide rails are arranged closer to the processing area, and the chips and dust generated by the processing are easy to enter between the slider and the vertical slide rail, which is easy to cause wear of the slider and the vertical slide rail over time, resulting in a decrease in vertical sliding accuracy, unstable sliding fit, and ultimately a decrease in engraving accuracy. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a three-dimensional engraving machine. The present invention solves the technical problem that the engraving accuracy of the engraving machine is easily reduced after long-term use.

[0006] The objective of the present invention can be achieved through the following technical scheme: a three-dimensional engraving machine, comprising a frame, a strip-shaped crossbeam, a tool holder connected to the crossbeam and a mounting seat arranged on the front side of the frame, the frame comprising two columns, characterized in that a vertically arranged slide rail is fixed to the outer sides of the columns in the left and right directions, the two ends of the crossbeam respectively have annular sliding sleeve parts, the two sliding sleeve parts are respectively located in the extension directions of the two ends of the crossbeam and are respectively sleeved on the corresponding columns, a slider is fixed to the inner side of each sliding sleeve part, and the slider is slidably connected to the slide rail.

[0007] In the prior art, a blowing device is generally used to blow away the chips or to strengthen the strength and hardness of the beam and the slide rail itself, so that the slide rail is not easily deformed and worn, thereby solving the above-mentioned problem; the present invention is different from the existing conventional technical means. In the present invention, the three-dimensional engraving machine overcomes the problem of decreased engraving accuracy after long-term use of the engraving machine by improving the position of the vertical slide rail and its related structure of sliding cooperation with the beam. Specifically, the present engraving machine arranges vertical slide rails on the left and right sides of the frame, that is, the vertical slide rails are arranged on the outer sides of the two columns in the left and right directions, and designs annular sliding sleeve parts at both ends of the strip-shaped crossbeam, and the sliding sleeve parts are sleeved on the corresponding columns, so that the position of the crossbeam is located between the two columns, and then a sliding block corresponding to the position of the slide rail is fixed on the inner side of the sliding sleeve part to realize the sliding connection between the crossbeam and the column; from the above structural analysis, it can be seen that the vertical slide rail of the present engraving machine is far away from the processing area where the front mounting seat of the frame is located, and the dustproof effect is good, which can prevent most of the chips from entering the vertical slide rail, thereby reducing the wear problem of the vertical slide rail caused by the entry of chips, so that the engraving accuracy of the present engraving machine is not easy to deteriorate after a long time. At the same time, the two ends of the crossbeam are sleeved on the column through the sliding sleeve part, and because the sliding sleeve part is designed in the straight extension direction of the strip crossbeam, the position relationship between the crossbeam and the two columns in the front-to-back direction will not deviate to one side, and the vertical slide rail is located on the outside of the column, and the slider is located on the inside of the sliding sleeve, that is, none of the three positions of the sliding cooperation, the column and the crossbeam will deviate to the front and rear sides of the vertical plane where the three are located, so that the crossbeam itself is not easy to generate horizontal and longitudinal components on the vertical slide rail, so that the vertical slide rail is not easy to deform or wear on one side, thereby further making the engraving accuracy of the engraving machine not easy to decrease, so that the engraving accuracy of the engraving machine can be guaranteed for a long time. In addition, the above-mentioned sliding sleeve part and the crossbeam can be designed as an integral or split body, and the ring-shaped ring of the sliding sleeve part includes a square frame structure, a circular sleeve structure, or other ring-shaped structures that are surrounded in a circle or have partial gaps.

[0008] In the above-mentioned three-dimensional engraving machine, there are two slide rails on each of the columns, and the distance from the slide rail close to the front side of the beam to the front side of the beam is the same as the distance from the slide rail close to the rear side of the beam to the rear side of the beam. Through the above design, on the one hand, the two vertical slide rails can ensure the stability of sliding, and of course a wider slide rail can also be understood as two slide rails; on the other hand, the position arrangement of the above-mentioned two vertical slide rails and the front and rear sides of the beam makes the position of the vertical slide rail and the beam unbiased, so that the beam itself will not generate horizontal longitudinal force on the vertical slide rail, making it difficult for the vertical slide rail to deform or wear on one side, so that the engraving accuracy of this engraving machine is not easy to decrease after long-term use.

[0009] In the above-mentioned three-dimensional engraving machine, a cushion block is fixedly connected between the inner side of the sleeve and the slider. By squeezing the cushion block designed above, it is possible to avoid an unreasonable gap between the slider and the vertical slide rail and thus prevent the slider from loosening, so that the slider and the vertical slide rail can fit closely together, thereby ensuring the sliding stability of the two, and thus making the engraving accuracy of the engraving machine not easy to decrease after long-term use.

[0010] In the above-mentioned three-dimensional engraving machine, the sliding sleeve part includes a side plate and an end plate, the side plates are fixed or integrally formed on the front and rear sides of the beam, the end plates are fixed on the ends of the side plates, the corresponding columns are surrounded between the two side plates and the end plates, and the slider is fixed on the inner side of the end plate. The sliding sleeve part designed as above is a rectangular frame structure as a whole, that is, a rectangular frame structure formed by two side plates and the end plates at one end of the beam, so that the connection between the beam and the column for sliding connection has good structural rigidity, so that the structure at this place is not easy to deform after long-term use, thereby ensuring the stability of the vertical sliding of the beam, and further making the engraving accuracy of the engraving machine not easy to decrease after long-term use.

[0011] In the above-mentioned three-dimensional engraving machine, the bottom of the two side panels is fixed or integrally formed with a bottom plate that connects the two side panels. Through the design of the above bottom plate, the rigidity of the sliding connection structure at both ends of the crossbeam is further strengthened, thereby further making the engraving accuracy of the engraving machine not easy to decrease after long-term use.

[0012] In the above-mentioned three-dimensional engraving machine, the column outer cover is provided with a dust cover, the front side, the rear side and the outer side of the column are all shielded by the dust cover, and the slide rail and the sliding sleeve are both located in the corresponding dust cover. Since the vertical slide rail of the engraving machine is designed on the outer side of the column, the engraving machine can be installed with the above-mentioned dust cover on both sides of the column, and the vertical slide rail is further shielded by the dust cover, so as to better prevent chips or dust from entering the slide rail and causing the slide rail to wear, so that the crossbeam can slide stably for a long time, thereby further making the engraving accuracy of the engraving machine not easy to decrease after long-term use.

[0013] In the above-mentioned three-dimensional engraving machine, the sliding sleeve part slides up and down relative to the column with the crossbeam under the drive of the driving device, and the driving device is a driving cylinder, a hydraulic cylinder or a screw motor. The driving cylinder or the driving oil cylinder can fix the piston rod to the sliding sleeve part to drive the sliding sleeve part to slide; the screw motor can cooperate with the screw by fixing a nut on the sliding sleeve part, so that the screw motor can drive the sliding sleeve part to slide.

[0014] In the above-mentioned three-dimensional engraving machine, the upper side surface of the crossbeam is slidably connected to a support plate that can slide horizontally, and the tool holder is slidably connected to the support plate and can slide horizontally longitudinally; the mounting seat is arranged separately on the front side of the frame; or the mounting seat is directly fixed to the frame; or the mounting seat is fixed to the frame through a connecting member. Specifically, a transverse guide rail arranged horizontally in the transverse direction is fixed on the upper side surface of the crossbeam, and the support plate is slidably connected to the transverse guide rail and driven by a driving member 1; a longitudinal guide rail arranged horizontally in the longitudinal direction is fixed on the support plate, and the tool holder is slidably connected to the longitudinal guide rail and driven by a driving member 2; a saw blade and a drill are provided at the front and rear ends of the tool holder, respectively.

[0015] As another solution, in the above-mentioned three-dimensional engraving machine, the engraving machine also includes a base, the frame is slidably connected to the base and can slide along the horizontal longitudinal direction, the upper side surface of the crossbeam is slidably connected to a support plate that can slide along the horizontal transverse direction, and the tool holder is fixedly connected to the support plate; the mounting seat is separately arranged on the front side of the base; or the mounting seat is directly fixedly connected to the base; or the mounting seat is fixedly connected to the base through a connecting member. Specifically, a longitudinal guide rail arranged along the horizontal longitudinal direction is fixed on the base, the frame is slidably connected to the longitudinal guide rail and driven by a third driving member; a transverse guide rail arranged along the horizontal transverse direction is fixed on the upper side surface of the crossbeam, the support plate is slidably connected to the transverse guide rail and driven by a second driving member; a saw blade and a drill bit are respectively provided at the front and rear ends of the tool holder. The above-mentioned driving members one, two, and three can all be driven by cylinders, oil cylinders, motors, and other driving members.

[0016] In the above-mentioned three-dimensional engraving machine, a single-column positioning structure is provided on one side of the mounting seat, and the single-column positioning structure includes a mounting table, and four rectangularly distributed guide rods are fixed on the mounting table, and a lifting block is slidably connected to the guide rod, and a horizontal guide rod arranged horizontally is fixed on the lifting block, and a positioning block provided with a top is slidably connected to the horizontal guide rod, and the positioning block is driven by a driving member 4. As another scheme, a double-column positioning structure is provided between the mounting seat and the frame in the above-mentioned three-dimensional engraving machine, and the double-column positioning structure includes mounting columns located on the left and right sides of the mounting seat and a positioning frame located above the mounting seat and arranged horizontally, and the positioning frame is slidably connected to the mounting column and can slide vertically, and a top is provided in the middle of the positioning frame. When the workpiece is vertically clamped on the mounting seat, the top is positioned by the positioning member in the above-mentioned single-column positioning structure or double-column positioning structure, so as to improve the clamping positioning accuracy and ensure the engraving accuracy of the engraving machine.

[0017] Compared with the existing technology, this three-dimensional engraving machine has the following advantages:

[0018] 1. The vertical slide rails of this engraving machine are arranged on the left and right sides of the frame, away from the processing area where the mounting seat on the front side of the frame is located, and a dust cover can be installed, which has a good dustproof effect and can prevent most of the chips from entering the vertical slide rails, thereby reducing the wear problem of the vertical slide rails caused by the chips entering, so that the engraving accuracy of this engraving machine is not easy to decrease after a long time;

[0019] 2. The design of the sliding sleeve structure on both sides of the crossbeam in this engraving machine and the position design of the vertical slide rail and the crossbeam ensure that the crossbeam itself will not generate horizontal and longitudinal force on the vertical slide rail, so that the vertical slide rail is not easy to deform or wear on one side after long-term use, thereby further reducing the engraving accuracy of this engraving machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the engraving machine in the first embodiment. Figure 1 .

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle beam Figure 1 .

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle beam Figure 2 .

[0023] Figure 4 It is a schematic diagram of the single-column positioning structure in this engraving machine.

[0024] Figure 5 This is a schematic diagram of the structure of the engraving machine in the first embodiment. Figure 2 .

[0025] Figure 6 This is a schematic diagram of the structure of the engraving machine in the first embodiment. Figure 3 .

[0026] Figure 7 This is a schematic diagram of the structure of the engraving machine in the first embodiment. Figure 4 .

[0027] Figure 8 This is a schematic diagram of the structure of the engraving machine in the second embodiment. Figure 1 .

[0028] Fig. 9 This is a schematic diagram of the structure of the engraving machine in the second embodiment. Figure 2 .

[0029] Fig.10 This is a schematic diagram of the structure of the engraving machine in the second embodiment. Figure 3 .

[0030] In the figure, 1, frame; 1a, column; 2, crossbeam; 2a, sliding sleeve; 2a1, side plate; 2a2, end plate; 2a3, bottom plate; 3, tool holder; 31, saw blade; 32, drill bit; 4, mounting seat; 5, slide rail; 6, slider; 7, cushion block; 8, dust cover; 9, driving device; 10, support plate; 11, connecting piece; 12, transverse guide rail; 13, base; 14, longitudinal guide rail; 15, driving member one; 16, driving member two; 17, driving member three; 18, mounting table; 19, lifting block; 20, guide rod; 21, horizontal guide rod; 22, positioning block; 23, driving member four; 24, mounting column; 25, positioning frame; 26, top. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] Embodiment 1:

[0033] Specifically, if Figure 1As shown, the three-dimensional engraving machine includes a frame 1, a strip-shaped crossbeam 2, a tool holder 3 connected to the crossbeam 2, and a mounting seat 4 arranged on the front side of the frame 1. The frame 1 includes two columns 1a. The columns 1a are fixed with slide rails 5 arranged vertically on the outer sides in the left and right directions. There are two slide rails 5 on each column 1a. The distance from the slide rail 5 close to the front side of the crossbeam 2 to the front side of the crossbeam 2 is the same as the distance from the slide rail 5 close to the rear side of the crossbeam 2 to the rear side of the crossbeam 2. The two ends of the crossbeam 2 are respectively provided with a sliding sleeve portion 2a, and the sliding sleeve portion 2a is in the shape of a rectangular frame. The two sliding sleeve portions 2a are located in the length direction of the crossbeam 2 and are respectively sleeved on the corresponding columns 1a. The inner side of the sliding sleeve portion 2a is fixed with a slider 6 corresponding to the position of the above-mentioned slide rail 5 and slidably connected. In addition, a cushion block 7 is fixed between the inner side of the sliding sleeve portion 2a and the slider 6.

[0034] More specifically, if Figure 2 and Figure 3 As shown, the sleeve portion 2a includes a side plate 2a1 and an end plate 2a2, the side plate 2a1 is fixed or integrally formed on the front and rear sides of the cross beam 2, the end plate 2a2 is fixed on the end of the side plate 2a1, the corresponding column 1a is surrounded between the two side plates 2a1 and the end plate 2a2, and the slider 6 is fixed on the inner side of the end plate 2a2. The bottom of the two side plates 2a1 is fixed or integrally formed with a bottom plate 2a3 that connects the two side plates 2a1. The sleeve portion 2a slides up and down relative to the column 1a with the cross beam 2 under the drive of the driving device 9, and the driving device 9 is a driving cylinder, a hydraulic cylinder or a screw motor. In this embodiment, the driving device 9 is preferably a screw motor, and by setting a gear transmission mechanism and a screw rod, the sleeve portions 2a on both sides of the column 1a can be moved synchronously through a screw motor. In addition, since the slide rail 5 of the engraving machine adopts the above-mentioned setting, a dust cover 8 can be provided on the outside of the column 1a, and the front, rear and outer sides of the column 1a are all blocked by the dust cover 8, and the slide rail 5 and the sliding sleeve part 2a are both located in the corresponding dust cover 8.

[0035] For example Figures 1 to 3 As shown, the upper side of the cross beam 2 is slidably connected with a support plate 10 that can slide horizontally, and the tool holder 3 is slidably connected to the support plate 10 and can slide horizontally longitudinally; wherein, a transverse guide rail 12 arranged horizontally in the transverse direction is fixed on the upper side of the cross beam 2, and the support plate 10 is slidably connected to the transverse guide rail 12 and driven by a driving member 15; a longitudinal guide rail 14 arranged horizontally in the longitudinal direction is fixed on the support plate 10, and the tool holder 3 is slidably connected to the longitudinal guide rail 14 and driven by a driving member 2 16; a saw blade 31 and a drill bit 32 are respectively provided at the front and rear ends of the tool holder 3. Figure 5 , Figure 6 and Figure 7 As shown, the mounting seat 4 is separately arranged on the front side of the frame 1; or the mounting seat 4 is directly fixedly connected to the frame 1; or the mounting seat 4 is fixedly connected to the frame 1 through a connecting member 11.

[0036] In addition, the engraving machine can adopt a single-column positioning structure or a double-column positioning structure. Figure 1 and Figure 4 As shown, a single-column positioning structure is provided on one side of the mounting seat 4, and the single-column positioning structure includes a mounting platform 18, on which four rectangularly distributed guide rods 20 are fixed, and a lifting block 19 is slidably connected to the guide rod 20, and a horizontal guide rod 21 arranged along the horizontal lateral direction is fixed to the lifting block 19, and a positioning block 22 with a top 26 is slidably connected to the horizontal guide rod 21, and the positioning block 22 is driven by a driving member 23. Figure 6 and Figure 7 As shown, a double-column positioning structure is provided between the mounting base 4 and the frame 1, and the double-column positioning structure includes mounting columns 24 located on the left and right sides of the mounting base 4 and a positioning frame 25 located above the mounting base 4 and arranged laterally, the positioning frame 25 is slidably connected to the mounting columns 24 and can slide in the vertical direction, and a top 26 is provided in the middle of the positioning frame 25.

[0037] In this example, the above-mentioned driving parts 15, 2, 3, and 4 can all be driving parts such as cylinders, oil cylinders, and motors.

[0038] Embodiment 2:

[0039] The technical solution in this embodiment is basically the same as that in the first embodiment, except that Figure 8 , Fig. 9 , Fig.10 As shown, in this embodiment, the engraving machine also includes a base 13, the frame 1 is slidably connected to the base 13 and can slide in the horizontal longitudinal direction, the upper side of the crossbeam 2 is slidably connected to a support plate 10 that can slide in the horizontal transverse direction, and the tool holder 3 is fixedly connected to the support plate 10; the mounting seat 4 is arranged separately on the front side of the base 13; or the mounting seat 4 is directly fixedly connected to the base 13; or the mounting seat 4 is fixedly connected to the base 13 through a connecting member 11. A longitudinal guide rail 14 arranged in the horizontal longitudinal direction is fixed on the base 13, the frame 1 is slidably connected to the longitudinal guide rail 14 and driven by a third driving member 17; a transverse guide rail 12 arranged in the horizontal transverse direction is fixed on the upper side of the crossbeam 2, and the support plate 10 is slidably connected to the transverse guide rail 12 and driven by a second driving member 16.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0041] Although the terms such as frame 1, column 1a, crossbeam 2, sleeve 2a, side plate 2a1, end plate 2a2, bottom plate 2a3, tool holder 3, saw blade 31, drill bit 32, mounting seat 4, slide rail 5, slide block 6, cushion block 7, dust cover 8, drive device 9, support plate 10, connecting member 11, transverse guide rail 12, base 13, longitudinal guide rail 14, drive member 1 15, drive member 2 16, drive member 3 17, mounting table 18, lifting block 19, guide rod 20, horizontal guide rod 21, positioning block 22, drive member 4 23, mounting column 24, positioning frame 25, top 26 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A three-dimensional engraving machine, comprising a frame (1), a strip-shaped crossbeam (2), a tool holder (3) connected to the crossbeam (2), and a mounting seat (4) arranged on the front side of the frame (1), wherein the frame (1) comprises two columns (1a), characterized in that: A slide rail (5) arranged vertically is fixed to the outer sides of the two upright posts (1a) in the left-right direction. The two ends of the crossbeam (2) have annular slide sleeve parts (2a). The two slide sleeve parts (2a) are respectively located in the extension direction of the two ends of the crossbeam (2) and are respectively sleeved on the corresponding upright posts (1a). A slider (6) is fixed to the inner side of each slide sleeve part (2a). The slider (6) is slidably connected to the slide rail (5).

2. The three-dimensional engraving machine according to claim 1, characterized in that: There are two slide rails (5) on each of the uprights (1a), and the distance between the slide rail (5) close to the front side of the beam (2) and the front side of the beam (2) is the same as the distance between the slide rail (5) close to the rear side of the beam (2) and the rear side of the beam (2).

3. The three-dimensional engraving machine according to claim 1 or 2, characterized in that: The sliding sleeve portion (2a) comprises a side plate (2a1) and an end plate (2a2); the side plate (2a1) is fixed or integrally formed on the front and rear sides of the cross beam (2); the end plate (2a2) is fixed on the end of the side plate (2a1); the corresponding column (1a) is surrounded between the two side plates (2a1) and the end plate (2a2); and the slider (6) is fixed on the inner side of the end plate (2a2).

4. The three-dimensional engraving machine according to claim 3, characterized in that: A bottom plate (2a3) is fixed or integrally formed at the bottom of the two side plates (2a1) to connect the two side plates (2a1).

5. The three-dimensional engraving machine according to claim 1 or 2, characterized in that: The outer cover of the column (1a) is provided with a dust cover (8); the front side, the rear side and the outer side of the column (1a) are all shielded by the dust cover (8); and the slide rail (5) and the slide sleeve (2a) are both located in the corresponding dust cover (8).

6. The three-dimensional engraving machine according to claim 1 or 2, characterized in that: A cushion block (7) is fixedly connected between the inner side of the sliding sleeve portion (2a) and the sliding block (6).

7. The three-dimensional engraving machine according to claim 1 or 2, characterized in that: The sliding sleeve portion (2a) is driven by a driving device (9) to slide up and down with the crossbeam (2) relative to the column (1a); the driving device (9) is a driving cylinder, a hydraulic cylinder or a screw motor.

8. The three-dimensional engraving machine according to claim 1, characterized in that: The upper side of the crossbeam (2) is slidably connected to a support plate (10) capable of sliding horizontally, and the tool holder (3) is slidably connected to the support plate (10) and capable of sliding horizontally; the mounting seat (4) is separately arranged on the front side of the frame (1); or the mounting seat (4) is directly fixedly connected to the frame (1); or the mounting seat (4) is fixedly connected to the frame (1) via a connecting piece (11).

9. The three-dimensional engraving machine according to claim 8, characterized in that: A transverse guide rail (12) arranged in a horizontal transverse direction is fixed on the upper side of the crossbeam (2); the support plate (10) is slidably connected to the transverse guide rail (12) and driven by a first driving member (15); a longitudinal guide rail (14) arranged in a horizontal longitudinal direction is fixed on the support plate (10); the tool holder (3) is slidably connected to the longitudinal guide rail (14) and driven by a second driving member (16); a saw blade (31) and a drill bit (32) are respectively provided at the front and rear ends of the tool holder (3).

10. The three-dimensional engraving machine according to claim 1, characterized in that: The engraving machine further comprises a base (13), the frame (1) is slidably connected to the base (13) and can slide in a horizontal longitudinal direction, the upper side surface of the crossbeam (2) is slidably connected to a support plate (10) that can slide in a horizontal transverse direction, and the tool holder (3) is fixedly connected to the support plate (10); the mounting seat (4) is separately arranged on the front side of the base (13); or the mounting seat (4) is directly fixedly connected to the base (13); or the mounting seat (4) is fixedly connected to the base (13) via a connecting member (11).

11. The three-dimensional engraving machine according to claim 10, characterized in that: A longitudinal guide rail (14) arranged in a horizontal longitudinal direction is fixed on the base (13), and the frame (1) is slidably connected to the longitudinal guide rail (14) and driven by a third driving member (17); a transverse guide rail (12) arranged in a horizontal transverse direction is fixed on the upper side of the crossbeam (2), and the support plate (10) is slidably connected to the transverse guide rail (12) and driven by a second driving member (16); a saw blade (31) and a drill bit (32) are respectively provided at the front and rear ends of the tool holder (3).

12. The three-dimensional engraving machine according to claim 8 or 10, characterized in that: A single-column positioning structure is provided on one side of the mounting seat (4), and the single-column positioning structure comprises a mounting platform (18), on which four rectangularly distributed guide rods (20) are fixed, and a lifting block (19) is slidably connected to the guide rod (20), and a horizontal guide rod (21) arranged in a horizontal transverse direction is fixed to the lifting block (19), and a positioning block (22) provided with a top (26) is slidably connected to the horizontal guide rod (21), and the positioning block (22) is driven by a driving member (23).

13. The three-dimensional engraving machine according to claim 8 or 10, characterized in that: A double-column positioning structure is provided between the mounting seat (4) and the frame (1), the double-column positioning structure comprising mounting posts (24) located on the left and right sides of the mounting seat (4) and a positioning frame (25) located above the mounting seat (4) and arranged in the transverse direction, the positioning frame (25) being slidably connected to the mounting posts (24) and being able to slide in the vertical direction, and a top point (26) being provided in the middle of the positioning frame (25).

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